Merge branch 'data_migrations' of gimli.ms.mff.cuni.cz:/akce/mam/git/mamweb into data_migrations

5 years ago · 164d7625e0
45 changed files with 658 additions and 194 deletions
--- a/galerie/migrations/0001_initial.py
+++ b/galerie/migrations/0001_initial.py
@ -21,8 +21,8 @@ class Migration(migrations.Migration):
                ('datum_zmeny', models.DateTimeField(auto_now=True, verbose_name=b'Datum posledn\xc3\xad zm\xc4\x9bny')),
                ('popis', models.TextField(null=True, verbose_name=b'Popis', blank=True)),
                ('zobrazit', models.IntegerField(default=1, verbose_name=b'Zobrazit?', choices=[(0, b'V\xc5\xbedy'), (1, b'Organiz\xc3\xa1tor\xc5\xafm'), (2, b'Nikdy')])),
-                ('galerie_up', models.ForeignKey(blank=True, to='galerie.Galerie', null=True)),
-                ('soustredeni', models.ForeignKey(blank=True, to='seminar.Soustredeni', null=True)),
+                ('galerie_up', models.ForeignKey(blank=True, to='galerie.Galerie', null=True, on_delete=models.CASCADE)),
+                ('soustredeni', models.ForeignKey(blank=True, to='seminar.Soustredeni', null=True, on_delete=models.CASCADE)),
            ],
            options={
                'verbose_name': 'Galerie',
@ -42,7 +42,7 @@ class Migration(migrations.Migration):
                ('datum_vlozeni', models.DateTimeField(auto_now_add=True, verbose_name=b'Datum vlo\xc5\xbeen\xc3\xad')),
                ('datum', models.DateTimeField(verbose_name=b'Datum po\xc5\x99\xc3\xadzen\xc3\xad fotografie')),
                ('poradi', models.IntegerField(null=True, verbose_name=b'Po\xc5\x99ad\xc3\xad', blank=True)),
-                ('galerie', models.ForeignKey(to='galerie.Galerie')),
+                ('galerie', models.ForeignKey(to='galerie.Galerie', on_delete=models.CASCADE)),
            ],
            options={
                'verbose_name': 'Obr\xe1zek',
--- a/galerie/migrations/0004_nepovinna_galerie_u_obrazku.py
+++ b/galerie/migrations/0004_nepovinna_galerie_u_obrazku.py
@ -14,7 +14,7 @@ class Migration(migrations.Migration):
        migrations.AlterField(
            model_name='obrazek',
            name='galerie',
-            field=models.ForeignKey(blank=True, to='galerie.Galerie', null=True),
+            field=models.ForeignKey(blank=True, to='galerie.Galerie', null=True, on_delete=models.CASCADE),
            preserve_default=True,
        ),
    ]
--- a/galerie/migrations/0008_auto_20190430_2340.py
+++ b/galerie/migrations/0008_auto_20190430_2340.py
@ -0,0 +1,71 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.20 on 2019-04-30 21:40
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+import galerie.models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('galerie', '0007_obrazek_odstranen_datum'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='galerie',
+            name='datum_vytvoreni',
+            field=models.DateTimeField(auto_now_add=True, verbose_name='Datum vytvoření'),
+        ),
+        migrations.AlterField(
+            model_name='galerie',
+            name='datum_zmeny',
+            field=models.DateTimeField(auto_now=True, verbose_name='Datum poslední změny'),
+        ),
+        migrations.AlterField(
+            model_name='galerie',
+            name='nazev',
+            field=models.CharField(max_length=100, verbose_name='Název'),
+        ),
+        migrations.AlterField(
+            model_name='galerie',
+            name='popis',
+            field=models.TextField(blank=True, null=True, verbose_name='Popis'),
+        ),
+        migrations.AlterField(
+            model_name='galerie',
+            name='poradi',
+            field=models.IntegerField(blank=True, null=True, verbose_name='Pořadí'),
+        ),
+        migrations.AlterField(
+            model_name='galerie',
+            name='zobrazit',
+            field=models.IntegerField(choices=[(0, 'Vždy'), (1, 'Organizátorům'), (2, 'Nikdy')], default=1, verbose_name='Zobrazit?'),
+        ),
+        migrations.AlterField(
+            model_name='obrazek',
+            name='datum_vlozeni',
+            field=models.DateTimeField(auto_now_add=True, verbose_name='Datum vložení'),
+        ),
+        migrations.AlterField(
+            model_name='obrazek',
+            name='nazev',
+            field=models.CharField(blank=True, max_length=50, null=True, verbose_name='Název'),
+        ),
+        migrations.AlterField(
+            model_name='obrazek',
+            name='obrazek_velky',
+            field=models.ImageField(help_text='Lze vložit libovolně velký obrázek. Ideální je, aby alespoň jeden rozměr měl alespoň 500px.', upload_to=galerie.models.obrazek_filename),
+        ),
+        migrations.AlterField(
+            model_name='obrazek',
+            name='popis',
+            field=models.TextField(blank=True, null=True, verbose_name='Popis'),
+        ),
+        migrations.AlterField(
+            model_name='obrazek',
+            name='poradi',
+            field=models.IntegerField(blank=True, null=True, verbose_name='Pořadí'),
+        ),
+    ]
--- a/galerie/migrations/0009_auto_20190610_2358.py
+++ b/galerie/migrations/0009_auto_20190610_2358.py
@ -0,0 +1,31 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.21 on 2019-06-10 21:58
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('galerie', '0008_auto_20190430_2340'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='galerie',
+            name='galerie_up',
+            field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.SET_NULL, to='galerie.Galerie'),
+        ),
+        migrations.AlterField(
+            model_name='galerie',
+            name='soustredeni',
+            field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.PROTECT, to='seminar.Soustredeni'),
+        ),
+        migrations.AlterField(
+            model_name='obrazek',
+            name='galerie',
+            field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.SET_NULL, to='galerie.Galerie'),
+        ),
+    ]
--- a/galerie/models.py
+++ b/galerie/models.py
@ -57,7 +57,7 @@ class Obrazek(models.Model):
 	nazev = models.CharField('Název', max_length=50, blank=True, null=True)
 	popis = models.TextField('Popis', blank=True, null=True)
 	datum_vlozeni = models.DateTimeField('Datum vložení', auto_now_add=True)
-	galerie = models.ForeignKey('Galerie', blank=True, null=True)
+	galerie = models.ForeignKey('Galerie', blank=True, null=True, on_delete=models.SET_NULL)
 	poradi = models.IntegerField('Pořadí', blank=True, null=True)

 	def __unicode__(self):
@ -88,8 +88,10 @@ class Galerie(models.Model):
 	popis = models.TextField('Popis', blank = True, null = True)
 	titulni_obrazek = models.ForeignKey(Obrazek, blank = True, null = True, related_name = "+", on_delete = models.SET_NULL)
 	zobrazit = models.IntegerField('Zobrazit?', default = ORG, choices = VIDITELNOST)
-	galerie_up = models.ForeignKey('Galerie', blank = True, null = True)
-	soustredeni = models.ForeignKey(Soustredeni, blank = True, null = True)
+	galerie_up = models.ForeignKey('Galerie', blank = True, null = True,
+		on_delete=models.SET_NULL)
+	soustredeni = models.ForeignKey(Soustredeni, blank = True, null = True,
+		on_delete=models.PROTECT)
 	poradi = models.IntegerField('Pořadí', blank = True, null = True)

 	def __unicode__(self):
--- a/korektury/migrations/0001_initial.py
+++ b/korektury/migrations/0001_initial.py
@ -50,7 +50,7 @@ class Migration(migrations.Migration):
                ('cas', models.DateTimeField(help_text=b'\xc4\x8cas zad\xc3\xa1n\xc3\xad koment\xc3\xa1\xc5\x99e', verbose_name='\u010das koment\xe1\u0159e')),
                ('autor', models.TextField(help_text=b'Autor koment\xc3\xa1\xc5\x99e', verbose_name='autor koment\xe1\u0159e', blank=True)),
                ('text', models.TextField(help_text=b'Text koment\xc3\xa1\xc5\x99e', verbose_name='text koment\xe1\u0159e', blank=True)),
-                ('oprava', models.ForeignKey(to='korektury.Oprava')),
+                ('oprava', models.ForeignKey(to='korektury.Oprava', on_delete=models.CASCADE)),
            ],
            options={
                'ordering': ['cas'],
--- a/korektury/migrations/0002_auto_20151202_2351.py
+++ b/korektury/migrations/0002_auto_20151202_2351.py
@ -19,7 +19,7 @@ class Migration(migrations.Migration):
                ('cas', models.DateTimeField(default=django.utils.timezone.now, help_text=b'\xc4\x8cas zad\xc3\xa1n\xc3\xad koment\xc3\xa1\xc5\x99e', verbose_name='\u010das koment\xe1\u0159e')),
                ('autor', models.TextField(help_text=b'Autor koment\xc3\xa1\xc5\x99e', verbose_name='autor koment\xe1\u0159e', blank=True)),
                ('text', models.TextField(help_text=b'Text koment\xc3\xa1\xc5\x99e', verbose_name='text koment\xe1\u0159e', blank=True)),
-                ('oprava', models.ForeignKey(to='korektury.Oprava')),
+                ('oprava', models.ForeignKey(to='korektury.Oprava', on_delete=models.CASCADE)),
            ],
            options={
                'ordering': ['cas'],
--- a/korektury/migrations/0006_oprava_pdf.py
+++ b/korektury/migrations/0006_oprava_pdf.py
@ -14,7 +14,7 @@ class Migration(migrations.Migration):
        migrations.AddField(
            model_name='oprava',
            name='pdf',
-            field=models.ForeignKey(default=-1, to='korektury.KorekturovanePDF'),
+            field=models.ForeignKey(default=-1, to='korektury.KorekturovanePDF', on_delete=models.CASCADE),
            preserve_default=True,
        ),
    ]
--- a/korektury/migrations/0010_Pridani_odkazu_na_organizatora.py
+++ b/korektury/migrations/0010_Pridani_odkazu_na_organizatora.py
@ -15,11 +15,11 @@ class Migration(migrations.Migration):
        migrations.AddField(
            model_name='komentar',
            name='autor_org',
-            field=models.ForeignKey(blank=True, to='seminar.Organizator', help_text='Autor koment\xe1\u0159e', null=True),
+            field=models.ForeignKey(blank=True, to='seminar.Organizator', help_text='Autor koment\xe1\u0159e', null=True, on_delete=models.CASCADE),
        ),
        migrations.AddField(
            model_name='oprava',
            name='autor_org',
-            field=models.ForeignKey(blank=True, to='seminar.Organizator', help_text=b'Autor opravy', null=True),
+            field=models.ForeignKey(blank=True, to='seminar.Organizator', help_text=b'Autor opravy', null=True, on_delete=models.CASCADE),
        ),
    ]
--- a/korektury/migrations/0014_add_org_to_pdf.py
+++ b/korektury/migrations/0014_add_org_to_pdf.py
@ -16,10 +16,10 @@ class Migration(migrations.Migration):
            model_name='korekturovanepdf',
            name='org',
            field=models.ForeignKey(default=None,
-                                    blank=True,
-                                    to='seminar.Organizator',
-                                    help_text=b'Zodpov\xc4\x9bdn\xc3\xbd\
-                                            organiz\xc3\xa1tor za obsah',
-                                    null=True),
+                  blank=True,
+                  to='seminar.Organizator',
+                  help_text=b'Zodpov\xc4\x9bdn\xc3\xbd\
+                          organiz\xc3\xa1tor za obsah',
+                  null=True, on_delete=models.CASCADE),
        ),
    ]
--- a/korektury/migrations/0015_auto_20161004_2005.py
+++ b/korektury/migrations/0015_auto_20161004_2005.py
@ -14,6 +14,6 @@ class Migration(migrations.Migration):
        migrations.AlterField(
            model_name='korekturovanepdf',
            name='org',
-            field=models.ForeignKey(default=None, blank=True, to='seminar.Organizator', help_text=b'Zodpov\xc4\x9bdn\xc3\xbd organiz\xc3\xa1tor za obsah', null=True),
+            field=models.ForeignKey(default=None, blank=True, to='seminar.Organizator', help_text=b'Zodpov\xc4\x9bdn\xc3\xbd organiz\xc3\xa1tor za obsah', null=True, on_delete=models.CASCADE),
        ),
    ]
--- a/korektury/migrations/0016_auto_20190430_2340.py
+++ b/korektury/migrations/0016_auto_20190430_2340.py
@ -0,0 +1,77 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.20 on 2019-04-30 21:40
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+import django.db.models.deletion
+import django.utils.timezone
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('korektury', '0015_auto_20161004_2005'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='komentar',
+            name='cas',
+            field=models.DateTimeField(default=django.utils.timezone.now, help_text='Čas zadání komentáře', verbose_name='čas komentáře'),
+        ),
+        migrations.AlterField(
+            model_name='komentar',
+            name='text',
+            field=models.TextField(blank=True, help_text='Text komentáře', verbose_name='text komentáře'),
+        ),
+        migrations.AlterField(
+            model_name='korekturovanepdf',
+            name='cas',
+            field=models.DateTimeField(default=django.utils.timezone.now, help_text='Čas vložení PDF', verbose_name='čas vložení PDF'),
+        ),
+        migrations.AlterField(
+            model_name='korekturovanepdf',
+            name='komentar',
+            field=models.TextField(blank=True, help_text='Komentář ke korekturovanému PDF (např. na co se zaměřit)', verbose_name='komentář k PDF'),
+        ),
+        migrations.AlterField(
+            model_name='korekturovanepdf',
+            name='nazev',
+            field=models.CharField(blank=True, help_text='Název (např. 22.1 verze 4) korekturovaného PDF', max_length=50, verbose_name='název PDF'),
+        ),
+        migrations.AlterField(
+            model_name='korekturovanepdf',
+            name='org',
+            field=models.ForeignKey(blank=True, default=None, help_text='Zodpovědný organizátor za obsah', null=True, on_delete=django.db.models.deletion.CASCADE, to='seminar.Organizator'),
+        ),
+        migrations.AlterField(
+            model_name='korekturovanepdf',
+            name='status',
+            field=models.CharField(choices=[('pridavani', 'Přidávání korektur'), ('zanaseni', 'Korektury jsou zanášeny'), ('zastarale', 'Stará verze, nekorigovat')], default='pridavani', max_length=16, verbose_name='stav PDF'),
+        ),
+        migrations.AlterField(
+            model_name='korekturovanepdf',
+            name='stran',
+            field=models.IntegerField(default=0, help_text='Počet stran PDF', verbose_name='počet stran'),
+        ),
+        migrations.AlterField(
+            model_name='oprava',
+            name='autor',
+            field=models.ForeignKey(blank=True, help_text='Autor opravy', null=True, on_delete=django.db.models.deletion.CASCADE, to='seminar.Organizator'),
+        ),
+        migrations.AlterField(
+            model_name='oprava',
+            name='status',
+            field=models.CharField(choices=[('k_oprave', 'K opravě'), ('opraveno', 'Opraveno'), ('neni_chyba', 'Není chyba'), ('k_zaneseni', 'K zanesení do TeXu')], default='k_oprave', max_length=16, verbose_name='stav opravy'),
+        ),
+        migrations.AlterField(
+            model_name='oprava',
+            name='strana',
+            field=models.IntegerField(help_text='Strana s opravou (od 0)', verbose_name='strana s opravou'),
+        ),
+        migrations.AlterField(
+            model_name='oprava',
+            name='text',
+            field=models.TextField(blank=True, help_text='Text opravy', verbose_name='text opravy'),
+        ),
+    ]
--- a/korektury/migrations/0017_auto_20190610_2358.py
+++ b/korektury/migrations/0017_auto_20190610_2358.py
@ -0,0 +1,36 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.21 on 2019-06-10 21:58
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('korektury', '0016_auto_20190430_2340'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='komentar',
+            name='autor',
+            field=models.ForeignKey(blank=True, help_text='Autor komentáře', null=True, on_delete=django.db.models.deletion.SET_NULL, to='seminar.Organizator'),
+        ),
+        migrations.AlterField(
+            model_name='korekturovanepdf',
+            name='org',
+            field=models.ForeignKey(blank=True, default=None, help_text='Zodpovědný organizátor za obsah', null=True, on_delete=django.db.models.deletion.SET_NULL, to='seminar.Organizator'),
+        ),
+        migrations.AlterField(
+            model_name='oprava',
+            name='autor',
+            field=models.ForeignKey(blank=True, help_text='Autor opravy', null=True, on_delete=django.db.models.deletion.SET_NULL, to='seminar.Organizator'),
+        ),
+        migrations.AlterField(
+            model_name='oprava',
+            name='pdf',
+            field=models.ForeignKey(default=-1, on_delete=django.db.models.deletion.PROTECT, to='korektury.KorekturovanePDF'),
+        ),
+    ]
--- a/korektury/models.py
+++ b/korektury/models.py
@ -49,9 +49,8 @@ class KorekturovanePDF(models.Model):
 	pdf = models.FileField(u'PDF', upload_to = generate_filename)

 	org = models.ForeignKey(Organizator, blank=True,
-							help_text='Zodpovědný organizátor za obsah',
-							null=True,
-							default=None)
+		help_text='Zodpovědný organizátor za obsah',
+		null=True, default=None, on_delete=models.SET_NULL)

 	stran = models.IntegerField(u'počet stran', help_text='Počet stran PDF',
 								default=0)
@ -124,7 +123,7 @@ class Oprava(models.Model):
 	#Interní ID
 	id = models.AutoField(primary_key = True)

-	pdf = models.ForeignKey(KorekturovanePDF, default=-1)
+	pdf = models.ForeignKey(KorekturovanePDF, default=-1, on_delete=models.PROTECT)

 	strana = models.IntegerField(u'strana s opravou', help_text='Strana s opravou (od 0)')

@ -146,7 +145,7 @@ class Oprava(models.Model):

 	autor = models.ForeignKey(Organizator, blank = True,
 			help_text='Autor opravy',
-			null = True)
+			null = True, on_delete=models.SET_NULL)
 	
 	text = models.TextField(u'text opravy',blank = True, help_text='Text opravy')

@ -173,10 +172,10 @@ class Komentar(models.Model):

 	cas = models.DateTimeField(u'čas komentáře',default=timezone.now,help_text = 'Čas zadání komentáře')

-	oprava = models.ForeignKey(Oprava)
+	oprava = models.ForeignKey(Oprava, on_delete=models.CASCADE)
 	autor = models.ForeignKey(Organizator, blank = True,
 			help_text = u'Autor komentáře',
-			null = True)
+			null = True, on_delete=models.SET_NULL)
 	
 	text = models.TextField(u'text komentáře',blank = True, help_text='Text komentáře')

--- a/korektury/views.py
+++ b/korektury/views.py
@ -23,10 +23,10 @@ class KorekturyListView(generic.ListView):
 	model = KorekturovanePDF
 	# Nefunguje, filtry se vubec nepouziji
 	queryset = KorekturovanePDF.objects.annotate(
-		k_oprave_cnt=Count('oprava',filter=Q(oprava__status='k_oprave')),
-		opraveno_cnt=Count('oprava',filter=Q(oprava__status='opraveno')),
-		neni_chyba_cnt=Count('oprava',filter=Q(oprava__status='neni_chyba')),
-		k_zaneseni_cnt=Count('oprava',filter=Q(oprava__status='k_zaneseni')),
+		k_oprave_cnt=Count('oprava',distinct=True,filter=Q(oprava__status='k_oprave')),
+		opraveno_cnt=Count('oprava',distinct=True,filter=Q(oprava__status='opraveno')),
+		neni_chyba_cnt=Count('oprava',distinct=True,filter=Q(oprava__status='neni_chyba')),
+		k_zaneseni_cnt=Count('oprava',distinct=True,filter=Q(oprava__status='k_zaneseni')),
 		)
 	template_name = 'korektury/seznam.html'

--- a/mamweb/settings_common.py
+++ b/mamweb/settings_common.py
@ -52,14 +52,15 @@ AUTHENTICATION_BACKENDS = (
 )


-MIDDLEWARE_CLASSES = (
+MIDDLEWARE = (
    'reversion.middleware.RevisionMiddleware',
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.common.CommonMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
-    'mamweb.middleware.LoggedInHintCookieMiddleware',
+#	FIXME: rozbilo se při přechodu na Django 2.0, nevím, jestli 
+#	se to dá zahodit bez náhrady
+#    'mamweb.middleware.LoggedInHintCookieMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
-    'django.contrib.auth.middleware.SessionAuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware',
    'django.contrib.flatpages.middleware.FlatpageFallbackMiddleware',
--- a/mamweb/settings_local.py
+++ b/mamweb/settings_local.py
@ -10,7 +10,7 @@ import os.path
 # Import common settings
 from .settings_common import *

-MIDDLEWARE_CLASSES += (
+MIDDLEWARE += (
    'debug_toolbar.middleware.DebugToolbarMiddleware',
    )

--- a/mamweb/urls.py
+++ b/mamweb/urls.py
@ -9,29 +9,29 @@ from django import views
 urlpatterns = [

    # Admin a nastroje
-    url(r'^admin/', include(admin.site.urls)),  # NOQA
-    url(r'^ckeditor/', include('ckeditor_uploader.urls')),
-    url(r'^autocomplete/', include('autocomplete_light.urls')),
+    url('admin/', admin.site.urls),  # NOQA
+    url('ckeditor/', include('ckeditor_uploader.urls')),
+    url('autocomplete/', include('autocomplete_light.urls')),

    # Seminarova aplikace (ma vlastni podadresare)
-    url(r'^', include('seminar.urls')),
+    url('', include('seminar.urls')),
    
    # Korekturovaci aplikace (ma vlastni podadresare)
-    url(r'^', include('korektury.urls')),
+    url('', include('korektury.urls')),
    
    # Prednaskova aplikace (ma vlastni podadresare)
-    url(r'^', include('prednasky.urls')),
+    url('', include('prednasky.urls')),

    # Comments (interni i verejne)
-    url(r'^comments_dj/', include('django_comments.urls')),
-    url(r'^comments_fl/', include('fluent_comments.urls')),
+    url('comments_dj/', include('django_comments.urls')),
+    url('comments_fl/', include('fluent_comments.urls')),

 ]

 # This is only needed when using runserver.
 if settings.DEBUG:
    urlpatterns += [
-        url(r'^media/(?P<path>.*)$', views.static.serve,  # NOQA
+        url('media/<str:path>', views.static.serve,  # NOQA
            {'document_root': settings.MEDIA_ROOT, 'show_indexes': True}),
        ]
    urlpatterns += staticfiles_urlpatterns()
--- a/mamweb/wsgi.py
+++ b/mamweb/wsgi.py
@ -4,25 +4,14 @@ WSGI config for mamweb project.
 It exposes the WSGI callable as a module-level variable named ``application``.

 For more information on this file, see
-https://docs.djangoproject.com/en/1.7/howto/deployment/wsgi/
+https://docs.djangoproject.com/en/2.2/howto/deployment/wsgi/
 """

-import sys, os, os.path, traceback, time, signal
-os.environ.setdefault("DJANGO_SETTINGS_MODULE", "mamweb.settings")
-
-sys.path.append(os.path.abspath(os.path.join(os.path.dirname(__file__), '..')))
-sys.path.append(os.path.abspath(os.path.join(os.path.dirname(__file__), '..', 'lib', 'python2.7', 'site-packages')))
+import os

+from django.core.wsgi import get_wsgi_application

-try:
-    from django.core.wsgi import get_wsgi_application
-    application = get_wsgi_application()
+os.environ.setdefault("DJANGO_SETTINGS_MODULE", "mamweb.settings")

-except Exception:
-    print('handling WSGI exception')
-    # Error loading applications
-    if 'mod_wsgi' in sys.modules:
-        traceback.print_exc()
-        os.kill(os.getpid(), signal.SIGINT)
-        time.sleep(2)
+application = get_wsgi_application()

--- a/prednasky/migrations/0001_initial.py
+++ b/prednasky/migrations/0001_initial.py
@ -28,7 +28,7 @@ class Migration(migrations.Migration):
                ('obtiznost', models.IntegerField(verbose_name=b'Obt\xc3\xad\xc5\xbenost', choices=[(1, b'Lehk\xc3\xa1'), (2, b'St\xc5\x99edn\xc3\xad'), (3, b'T\xc4\x9b\xc5\xbek\xc3\xa1')])),
                ('obor', models.CharField(max_length=5, verbose_name=b'Obor')),
                ('klicova', models.CharField(max_length=200, null=True, verbose_name=b'Kl\xc3\xad\xc4\x8dov\xc3\xa1 slova', blank=True)),
-                ('org', models.ForeignKey(to='seminar.Organizator')),
+                ('org', models.ForeignKey(to='seminar.Organizator', on_delete=models.CASCADE)),
            ],
        ),
        migrations.CreateModel(
@ -40,6 +40,6 @@ class Migration(migrations.Migration):
        migrations.AddField(
            model_name='hlasovani',
            name='prednaska',
-            field=models.ForeignKey(to='prednasky.Prednaska'),
+            field=models.ForeignKey(to='prednasky.Prednaska', on_delete=models.CASCADE),
        ),
    ]
--- a/prednasky/migrations/0002_auto_20160417_2347.py
+++ b/prednasky/migrations/0002_auto_20160417_2347.py
@ -14,7 +14,7 @@ class Migration(migrations.Migration):
        migrations.AddField(
            model_name='prednaska',
            name='seznam',
-            field=models.ForeignKey(default=None, blank=True, to='prednasky.Seznam'),
+            field=models.ForeignKey(default=None, blank=True, to='prednasky.Seznam', on_delete=models.CASCADE),
        ),
        migrations.AlterField(
            model_name='hlasovani',
--- a/prednasky/migrations/0003_auto_20160929_0117.py
+++ b/prednasky/migrations/0003_auto_20160929_0117.py
@ -51,7 +51,7 @@ class Migration(migrations.Migration):
        migrations.AlterField(
            model_name='prednaska',
            name='seznam',
-            field=models.ForeignKey(to='prednasky.Seznam_old'),
+            field=models.ForeignKey(to='prednasky.Seznam_old',on_delete=models.CASCADE),
        ),
        migrations.AlterModelTable(
            name='hlasovani',
--- a/prednasky/migrations/0005_auto_20160929_0153.py
+++ b/prednasky/migrations/0005_auto_20160929_0153.py
@ -16,7 +16,7 @@ class Migration(migrations.Migration):
            name='Prednaska_Seznam',
            fields=[
                ('id', models.AutoField(serialize=False, primary_key=True)),
-                ('prednaska', models.ForeignKey(to='prednasky.Prednaska')),
+                ('prednaska', models.ForeignKey(to='prednasky.Prednaska', on_delete=models.CASCADE)),
            ],
            options={
                'db_table': 'prednasky_prednaska_seznam',
@ -29,7 +29,7 @@ class Migration(migrations.Migration):
            fields=[
                ('id', models.AutoField(serialize=False, primary_key=True)),
                ('stav', models.IntegerField(default=2, verbose_name=b'Stav', choices=[(1, b'N\xc3\xa1vrh'), (2, b'Bude')])),
-                ('soustredeni', models.ForeignKey(default=None, to='seminar.Soustredeni', null=True)),
+                ('soustredeni', models.ForeignKey(default=None, to='seminar.Soustredeni', null=True, on_delete=models.CASCADE)),
            ],
            options={
                'ordering': ['soustredeni', 'stav'],
@ -44,6 +44,6 @@ class Migration(migrations.Migration):
        migrations.AddField(
            model_name='prednaska_seznam',
            name='seznam',
-            field=models.ForeignKey(to='prednasky.Seznam'),
+            field=models.ForeignKey(to='prednasky.Seznam', on_delete=models.CASCADE),
        ),
    ]
--- a/prednasky/migrations/0006_hlasovani_seznam.py
+++ b/prednasky/migrations/0006_hlasovani_seznam.py
@ -14,7 +14,7 @@ class Migration(migrations.Migration):
        migrations.AddField(
            model_name='hlasovani',
            name='seznam',
-            field=models.ForeignKey(default=1, to='prednasky.Seznam'),
+            field=models.ForeignKey(default=1, to='prednasky.Seznam', on_delete=models.CASCADE),
            preserve_default=False,
        ),
    ]
--- a/prednasky/migrations/0011_auto_20190430_2340.py
+++ b/prednasky/migrations/0011_auto_20190430_2340.py
@ -0,0 +1,40 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.20 on 2019-04-30 21:40
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('prednasky', '0010_auto_20160929_0508'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='hlasovani',
+            name='body',
+            field=models.IntegerField(choices=[(-1, '-1'), (0, '0'), (1, '1')], default=0, verbose_name='Body'),
+        ),
+        migrations.AlterField(
+            model_name='hlasovani',
+            name='ucastnik',
+            field=models.CharField(max_length=100, verbose_name='Účastník'),
+        ),
+        migrations.AlterField(
+            model_name='prednaska',
+            name='anotace',
+            field=models.TextField(blank=True, help_text='Veřejná anotace v hlasování', null=True, verbose_name='Anotace'),
+        ),
+        migrations.AlterField(
+            model_name='prednaska',
+            name='obtiznost',
+            field=models.IntegerField(choices=[(1, 'Lehká'), (2, 'Střední'), (3, 'Těžká')], verbose_name='Obtížnost'),
+        ),
+        migrations.AlterField(
+            model_name='seznam',
+            name='stav',
+            field=models.IntegerField(choices=[(1, 'Návrh'), (2, 'Bude')], default=1, verbose_name='Stav'),
+        ),
+    ]
--- a/prednasky/migrations/0012_auto_20190610_2358.py
+++ b/prednasky/migrations/0012_auto_20190610_2358.py
@ -0,0 +1,31 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.21 on 2019-06-10 21:58
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('prednasky', '0011_auto_20190430_2340'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='hlasovani',
+            name='seznam',
+            field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.SET_NULL, to='prednasky.Seznam'),
+        ),
+        migrations.AlterField(
+            model_name='prednaska',
+            name='org',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, to='seminar.Organizator'),
+        ),
+        migrations.AlterField(
+            model_name='seznam',
+            name='soustredeni',
+            field=models.ForeignKey(default=None, null=True, on_delete=django.db.models.deletion.PROTECT, to='seminar.Soustredeni'),
+        ),
+    ]
--- a/prednasky/models.py
+++ b/prednasky/models.py
@ -25,7 +25,8 @@ class Seznam(models.Model):
 		ordering = ['soustredeni', 'stav']

 	id = models.AutoField(primary_key = True) 
-	soustredeni = models.ForeignKey(Soustredeni,null = True, default = None)
+	soustredeni = models.ForeignKey(Soustredeni,null = True, default = None, 
+		on_delete=models.PROTECT)
 	stav = models.IntegerField('Stav',choices=STAV_CHOICES,default = STAV_NAVRH)

 	def __str__(self):
@ -55,7 +56,7 @@ class Prednaska(models.Model):

 	id = models.AutoField(primary_key = True) 
 	nazev = models.CharField('Název', max_length = 300)
-	org = models.ForeignKey(Organizator) 
+	org = models.ForeignKey(Organizator, on_delete=models.PROTECT) 
 	popis = models.TextField('Popis pro orgy',null = True, blank = True,help_text = 'Neveřejný popis pro ostatní orgy')
 	anotace = models.TextField('Anotace',null = True, blank = True, help_text = 'Veřejná anotace v hlasování')
 	obtiznost = models.IntegerField('Obtížnost', choices=CHOICES_OBTIZNOST)
@ -75,10 +76,10 @@ class Hlasovani(models.Model):
 		verbose_name_plural = 'Hlasování'
 		ordering = ['ucastnik', 'prednaska']
 	id = models.AutoField(primary_key = True) 
-	prednaska = models.ForeignKey(Prednaska)
+	prednaska = models.ForeignKey(Prednaska, on_delete=models.CASCADE)
 	body = models.IntegerField('Body', default = 0, choices = CHOICES_BODY)
 	ucastnik = models.CharField('Účastník', max_length = 100)
-	seznam = models.ForeignKey(Seznam)
+	seznam = models.ForeignKey(Seznam,null=True,on_delete=models.SET_NULL)

 	def __str__(self):
 		return force_unicode("{} dal {} bodů {} v seznamu {}".format(self.ucastnik, 
--- a/requirements.txt
+++ b/requirements.txt
@ -1,30 +1,30 @@
 # basic libs

-psycopg2==2.7.5
-html5lib==1.0.1
-ipython==5.8.0
-Pillow==5.2.0
-pytz==2018.5
-six==1.10.0
-pexpect==4.6.0
-traitlets==4.3.2
-Unidecode==1.0.22
+psycopg2
+html5lib
+ipython
+Pillow
+pytz
+six
+pexpect
+traitlets
+Unidecode

 # Django and modules

-Django>=1.11.17,<2.0
+Django<2.3
 #django-bootstrap-sass
-django-mptt==0.9.1
-django-reversion==2.0.13
-django-sekizai==0.10.0
-django-countries==5.3.1
-django-solo==1.1.3
-django-ckeditor==5.6.1
-django-flat-theme==1.1.4
-django-taggit==0.23.0
+django-mptt
+django-reversion
+django-sekizai
+django-countries
+django-solo
+django-ckeditor
+django-flat-theme
+django-taggit
 django-autocomplete-light==2.3.6
-django-crispy-forms==1.7.2
-django-imagekit==4.0.2
+django-crispy-forms
+django-imagekit

 # Comments
 akismet==1.0.1
--- a/seminar/admin.py
+++ b/seminar/admin.py
@ -9,7 +9,7 @@ from ckeditor_uploader.widgets import CKEditorUploadingWidget
 from django.db.models import Count
 from django.db import models
 from django.utils.safestring import mark_safe
-from django.core.urlresolvers import reverse
+from django.urls import reverse

 from django.contrib.auth.models import User

--- a/seminar/export.py
+++ b/seminar/export.py
@ -1,7 +1,7 @@
 import datetime, django
 from django.shortcuts import get_object_or_404, render
 from django.http import HttpResponse
-from django.core.urlresolvers import reverse
+from django.urls import reverse
 from django.views import generic
 from django.utils.encoding import force_text

--- a/seminar/migrations/0001_initial.py
+++ b/seminar/migrations/0001_initial.py
@ -63,7 +63,7 @@ class Migration(migrations.Migration):
            name='Nastaveni',
            fields=[
                ('id', models.AutoField(verbose_name='ID', serialize=False, auto_created=True, primary_key=True)),
-                ('aktualni_cislo', models.ForeignKey(verbose_name='posledn\xed vydan\xe9 \u010d\xedslo', to='seminar.Cislo')),
+                ('aktualni_cislo', models.ForeignKey(verbose_name='posledn\xed vydan\xe9 \u010d\xedslo', to='seminar.Cislo', on_delete=models.CASCADE)),
            ],
            options={
                'db_table': 'seminar_nastaveni',
@ -98,10 +98,10 @@ class Migration(migrations.Migration):
                ('text_problemu', models.TextField(verbose_name='ve\u0159ejn\xfd text zad\xe1n\xed a \u0159e\u0161en\xed', blank=True)),
                ('kod', models.CharField(default=b'', help_text='\u010c\xedslo/k\xf3d \xfalohy v \u010d\xedsle nebo k\xf3d t\xe9matu/\u010dl\xe1nku/seri\xe1lu v ro\u010dn\xedku', max_length=32, verbose_name='lok\xe1ln\xed k\xf3d', blank=True)),
                ('body', models.IntegerField(null=True, verbose_name='maximum bod\u016f', blank=True)),
-                ('autor', models.ForeignKey(related_name='autor_uloh', verbose_name='autor probl\xe9mu', to=settings.AUTH_USER_MODEL)),
-                ('cislo_reseni', models.ForeignKey(related_name='resene_problemy', blank=True, to='seminar.Cislo', help_text='\u010c\xedslo s \u0159e\u0161en\xedm \xfalohy, jen pro \xfalohy', null=True, verbose_name='\u010d\xedslo \u0159e\u0161en\xed')),
-                ('cislo_zadani', models.ForeignKey(related_name='zadane_problemy', verbose_name='\u010d\xedslo zad\xe1n\xed', blank=True, to='seminar.Cislo', null=True)),
-                ('opravovatel', models.ForeignKey(related_name='opravovatel_uloh', verbose_name='opravovatel', blank=True, to=settings.AUTH_USER_MODEL, null=True)),
+                ('autor', models.ForeignKey(related_name='autor_uloh', verbose_name='autor probl\xe9mu', to=settings.AUTH_USER_MODEL, on_delete=models.CASCADE)),
+                ('cislo_reseni', models.ForeignKey(related_name='resene_problemy', blank=True, to='seminar.Cislo', help_text='\u010c\xedslo s \u0159e\u0161en\xedm \xfalohy, jen pro \xfalohy', null=True, verbose_name='\u010d\xedslo \u0159e\u0161en\xed', on_delete=models.CASCADE)),
+                ('cislo_zadani', models.ForeignKey(related_name='zadane_problemy', verbose_name='\u010d\xedslo zad\xe1n\xed', blank=True, to='seminar.Cislo', null=True, on_delete=models.CASCADE)),
+                ('opravovatel', models.ForeignKey(related_name='opravovatel_uloh', verbose_name='opravovatel', blank=True, to=settings.AUTH_USER_MODEL, null=True, on_delete=models.CASCADE)),
            ],
            options={
                'db_table': 'seminar_problemy',
@ -117,8 +117,8 @@ class Migration(migrations.Migration):
                ('body', models.IntegerField(null=True, verbose_name='body', blank=True)),
                ('timestamp', models.DateTimeField(auto_now=True, verbose_name='vytvo\u0159eno')),
                ('poznamka', models.TextField(help_text='Neve\u0159ejn\xe1 pozn\xe1mka k \u0159e\u0161en\xed (plain text)', verbose_name='neve\u0159ejn\xe1 pozn\xe1mka', blank=True)),
-                ('cislo_body', models.ForeignKey(related_name='bodovana_reseni', verbose_name='\u010d\xedslo pro body', blank=True, to='seminar.Cislo', null=True)),
-                ('problem', models.ForeignKey(related_name='reseni', verbose_name='probl\xe9m', to='seminar.Problem')),
+                ('cislo_body', models.ForeignKey(related_name='bodovana_reseni', verbose_name='\u010d\xedslo pro body', blank=True, to='seminar.Cislo', null=True, on_delete=models.CASCADE)),
+                ('problem', models.ForeignKey(related_name='reseni', verbose_name='probl\xe9m', to='seminar.Problem', on_delete=models.CASCADE)),
            ],
            options={
                'ordering': ['problem', 'resitel'],
@ -201,7 +201,7 @@ class Migration(migrations.Migration):
                ('datum_konce', models.DateField(help_text='Posledn\xed den soust\u0159ed\u011bn\xed', null=True, verbose_name='datum konce', blank=True)),
                ('verejne_db', models.BooleanField(default=False, verbose_name='soust\u0159ed\u011bn\xed zve\u0159ejn\u011bno', db_column='verejne')),
                ('misto', models.CharField(default=b'', help_text='M\xedsto (n\xe1zev obce, voliteln\u011b t\xe9\u017e objektu', max_length=256, verbose_name='m\xedsto soust\u0159ed\u011bn\xed', blank=True)),
-                ('rocnik', models.ForeignKey(related_name='soustredeni', verbose_name='ro\u010dn\xedk', to='seminar.Rocnik')),
+                ('rocnik', models.ForeignKey(related_name='soustredeni', verbose_name='ro\u010dn\xedk', to='seminar.Rocnik', on_delete=models.CASCADE)),
                ('ucastnici', models.ManyToManyField(help_text='Seznam \xfa\u010dastn\xedk\u016f soust\u0159ed\u011bn\xed', to='seminar.Resitel', db_table='seminar_soustredeni_ucastnici', verbose_name='\xfa\u010dastn\xedci soust\u0159ed\u011bn\xed')),
            ],
            options={
@ -215,37 +215,37 @@ class Migration(migrations.Migration):
        migrations.AddField(
            model_name='resitel',
            name='skola',
-            field=models.ForeignKey(verbose_name='\u0161kola', blank=True, to='seminar.Skola', null=True),
+            field=models.ForeignKey(verbose_name='\u0161kola', blank=True, to='seminar.Skola', null=True, on_delete=models.CASCADE),
            preserve_default=True,
        ),
        migrations.AddField(
            model_name='resitel',
            name='user',
-            field=models.OneToOneField(null=True, blank=True, to=settings.AUTH_USER_MODEL, verbose_name='u\u017eivatel'),
+            field=models.OneToOneField(null=True, blank=True, to=settings.AUTH_USER_MODEL, verbose_name='u\u017eivatel', on_delete=models.CASCADE),
            preserve_default=True,
        ),
        migrations.AddField(
            model_name='reseni',
            name='resitel',
-            field=models.ForeignKey(related_name='reseni', verbose_name='\u0159e\u0161itel', to='seminar.Resitel'),
+            field=models.ForeignKey(related_name='reseni', verbose_name='\u0159e\u0161itel', to='seminar.Resitel', on_delete=models.CASCADE),
            preserve_default=True,
        ),
        migrations.AddField(
            model_name='prilohareseni',
            name='reseni',
-            field=models.ForeignKey(related_name='prilohy', verbose_name='\u0159e\u0161en\xed', to='seminar.Reseni'),
+            field=models.ForeignKey(related_name='prilohy', verbose_name='\u0159e\u0161en\xed', to='seminar.Reseni', on_delete=models.CASCADE),
            preserve_default=True,
        ),
        migrations.AddField(
            model_name='nastaveni',
            name='aktualni_rocnik',
-            field=models.ForeignKey(verbose_name='aktu\xe1ln\xed ro\u010dn\xedk', to='seminar.Rocnik'),
+            field=models.ForeignKey(verbose_name='aktu\xe1ln\xed ro\u010dn\xedk', to='seminar.Rocnik', on_delete=models.CASCADE),
            preserve_default=True,
        ),
        migrations.AddField(
            model_name='cislo',
            name='rocnik',
-            field=models.ForeignKey(related_name='cisla', verbose_name='ro\u010dn\xedk', to='seminar.Rocnik'),
+            field=models.ForeignKey(related_name='cisla', verbose_name='ro\u010dn\xedk', to='seminar.Rocnik', on_delete=models.CASCADE),
            preserve_default=True,
        ),
    ]
--- a/seminar/migrations/0005_alter_problem_autor.py
+++ b/seminar/migrations/0005_alter_problem_autor.py
@ -15,7 +15,7 @@ class Migration(migrations.Migration):
        migrations.AlterField(
            model_name='problem',
            name='autor',
-            field=models.ForeignKey(related_name='autor_uloh', verbose_name='autor probl\xe9mu', blank=True, to=settings.AUTH_USER_MODEL, null=True),
+            field=models.ForeignKey(related_name='autor_uloh', verbose_name='autor probl\xe9mu', blank=True, to=settings.AUTH_USER_MODEL, null=True, on_delete=models.CASCADE),
            preserve_default=True,
        ),
    ]
--- a/seminar/migrations/0013_soustredeni_ucastnici_through_model.py
+++ b/seminar/migrations/0013_soustredeni_ucastnici_through_model.py
@ -16,8 +16,8 @@ class Migration(migrations.Migration):
            fields=[
                ('id', models.AutoField(serialize=False, primary_key=True)),
                ('poznamka', models.CharField(default=b'', help_text='Neve\u0159ejn\xe1 pozn\xe1mka k \xfa\u010dasti (plain text)', max_length=64, verbose_name='neve\u0159ejn\xe1 pozn\xe1mka', blank=True)),
-                ('resitel', models.ForeignKey(verbose_name='\u0159e\u0161itel', to='seminar.Resitel')),
-                ('soustredeni', models.ForeignKey(verbose_name='soust\u0159ed\u011bn\xed', to='seminar.Soustredeni')),
+                ('resitel', models.ForeignKey(verbose_name='\u0159e\u0161itel', to='seminar.Resitel', on_delete=models.CASCADE)),
+                ('soustredeni', models.ForeignKey(verbose_name='soust\u0159ed\u011bn\xed', to='seminar.Soustredeni',on_delete=models.CASCADE)),
            ],
            options={
                'ordering': ['soustredeni', 'resitel'],
--- a/seminar/migrations/0023_add_novinky.py
+++ b/seminar/migrations/0023_add_novinky.py
@ -21,7 +21,7 @@ class Migration(migrations.Migration):
                ('text', models.TextField(null=True, verbose_name=b'Text novinky', blank=True)),
                ('obrazek', models.ImageField(upload_to=b'image_novinky/%Y/%m/%d/', null=True, verbose_name=b'Obr\xc3\xa1zek', blank=True)),
                ('zverejneno', models.BooleanField(default=False, verbose_name=b'Zve\xc5\x99ejn\xc4\x9bno')),
-                ('autor', models.ForeignKey(verbose_name=b'Autor novinky', to=settings.AUTH_USER_MODEL)),
+                ('autor', models.ForeignKey(verbose_name=b'Autor novinky', to=settings.AUTH_USER_MODEL, on_delete=models.CASCADE))
            ],
            options={
                'verbose_name': 'Novinka',
--- a/seminar/migrations/0024_add_organizator.py
+++ b/seminar/migrations/0024_add_organizator.py
@ -24,7 +24,7 @@ class Migration(migrations.Migration):
                ('strucny_popis_organizatora', models.TextField(null=True, verbose_name=b'Stru\xc4\x8dn\xc3\xbd popis organiz\xc3\xa1tora', blank=True)),
                ('foto', models.ImageField(help_text=b'Vlo\xc5\xbe fotografii organiz\xc3\xa1tora o libovon\xc3\xa9 velikosti', upload_to=b'image_organizatori/%Y/', null=True, verbose_name=b'Fotografie organiz\xc3\xa1tora', blank=True)),
                ('foto_male', models.ImageField(upload_to=b'image_organizatori/male/%Y/', null=True, editable=False, blank=True)),
-                ('user', models.OneToOneField(verbose_name=b'Osoba', to=settings.AUTH_USER_MODEL, help_text=b'Vyber \xc3\xba\xc4\x8det sp\xc5\x99a\xc5\xbeen\xc3\xbd s organiz\xc3\xa1torem.')),
+                ('user', models.OneToOneField(verbose_name=b'Osoba', to=settings.AUTH_USER_MODEL, help_text=b'Vyber \xc3\xba\xc4\x8det sp\xc5\x99a\xc5\xbeen\xc3\xbd s organiz\xc3\xa1torem.',on_delete=models.CASCADE)),
            ],
            options={
                'verbose_name': 'Organiz\xe1tor',
--- a/seminar/migrations/0036_add_org_to_soustredeni.py
+++ b/seminar/migrations/0036_add_org_to_soustredeni.py
@ -16,8 +16,8 @@ class Migration(migrations.Migration):
            fields=[
                ('id', models.AutoField(serialize=False, primary_key=True)),
                ('poznamka', models.TextField(help_text='Neve\u0159ejn\xe1 pozn\xe1mka k \xfa\u010dasti organiz\xe1tora (plain text)', verbose_name='neve\u0159ejn\xe1 pozn\xe1mka', blank=True)),
-                ('organizator', models.ForeignKey(verbose_name='organiz\xe1tor', to='seminar.Organizator')),
-                ('soustredeni', models.ForeignKey(verbose_name='soust\u0159ed\u011bn\xed', to='seminar.Soustredeni')),
+                ('organizator', models.ForeignKey(verbose_name='organiz\xe1tor', to='seminar.Organizator', on_delete=models.CASCADE)),
+                ('soustredeni', models.ForeignKey(verbose_name='soust\u0159ed\u011bn\xed', to='seminar.Soustredeni', on_delete=models.CASCADE)),
            ],
            options={
                'ordering': ['soustredeni', 'organizator'],
--- a/seminar/migrations/0037_prispevek.py
+++ b/seminar/migrations/0037_prispevek.py
@ -19,8 +19,8 @@ class Migration(migrations.Migration):
                ('text_org', models.TextField(null=True, verbose_name=b'Orgovsk\xc3\xbd text', blank=True)),
                ('text_resitel', models.TextField(null=True, verbose_name=b'\xc5\x98e\xc5\xa1itelsk\xc3\xbd text', blank=True)),
                ('zverejnit', models.BooleanField(verbose_name=b'Zve\xc5\x99ejnit?')),
-                ('problem', models.ForeignKey(verbose_name=b'Probl\xc3\xa9m', to='seminar.Problem')),
-                ('reseni', models.OneToOneField(null=True, blank=True, to='seminar.Reseni', verbose_name=b'\xc5\x98e\xc5\xa1en\xc3\xad')),
+                ('problem', models.ForeignKey(verbose_name=b'Probl\xc3\xa9m', to='seminar.Problem', on_delete=models.CASCADE)),
+                ('reseni', models.OneToOneField(null=True, blank=True, to='seminar.Reseni', verbose_name=b'\xc5\x98e\xc5\xa1en\xc3\xad', on_delete=models.CASCADE)),
            ],
            options={
                'abstract': False,
--- a/seminar/migrations/0039_pohadka.py
+++ b/seminar/migrations/0039_pohadka.py
@ -21,8 +21,8 @@ class Migration(migrations.Migration):
                ('text', models.TextField(verbose_name='Text poh\xe1dky')),
                ('pred', models.BooleanField(default=True, verbose_name='P\u0159ed \xfalohou')),
                ('timestamp', models.DateTimeField(default=django.utils.timezone.now, verbose_name='Vytvo\u0159eno', editable=False, blank=True)),
-                ('autor', models.ForeignKey(verbose_name=b'Autor poh\xc3\xa1dky', to=settings.AUTH_USER_MODEL)),
-                ('uloha', models.ForeignKey(related_name='pohadky', verbose_name='\xdaloha', to='seminar.Problem')),
+                ('autor', models.ForeignKey(verbose_name=b'Autor poh\xc3\xa1dky', to=settings.AUTH_USER_MODEL, on_delete=models.CASCADE)),
+                ('uloha', models.ForeignKey(related_name='pohadky', verbose_name='\xdaloha', to='seminar.Problem',on_delete=models.CASCADE)),
            ],
            options={
                'ordering': ['uloha__cislo_zadani', 'uloha__kod', '-pred'],
--- a/seminar/migrations/0040_pohadka_nepovinny_autor.py
+++ b/seminar/migrations/0040_pohadka_nepovinny_autor.py
@ -15,6 +15,6 @@ class Migration(migrations.Migration):
        migrations.AlterField(
            model_name='pohadka',
            name='autor',
-            field=models.ForeignKey(verbose_name=b'Autor poh\xc3\xa1dky', to=settings.AUTH_USER_MODEL, null=True),
+            field=models.ForeignKey(verbose_name=b'Autor poh\xc3\xa1dky', to=settings.AUTH_USER_MODEL, null=True, on_delete=models.CASCADE),
        ),
    ]
--- a/seminar/migrations/0041_konfery.py
+++ b/seminar/migrations/0041_konfery.py
@ -37,8 +37,9 @@ class Migration(migrations.Migration):
            fields=[
                ('id', models.AutoField(serialize=False, primary_key=True)),
                ('poznamka', models.TextField(help_text='Neve\u0159ejn\xe1 pozn\xe1mka k \xfa\u010dasti (plain text)', verbose_name='neve\u0159ejn\xe1 pozn\xe1mka', blank=True)),
-                ('konfera', models.ForeignKey(verbose_name='konfera', to='seminar.Konfera')),
-                ('resitel', models.ForeignKey(verbose_name='\u0159e\u0161itel', to='seminar.Resitel')),
+                ('konfera', models.ForeignKey(verbose_name='konfera', to='seminar.Konfera',
+		on_delete=models.PROTECT)),
+                ('resitel', models.ForeignKey(verbose_name='\u0159e\u0161itel', to='seminar.Resitel',on_delete=models.CASCADE)),
            ],
            options={
                'ordering': ['konfera', 'resitel'],
--- a/seminar/migrations/0064_auto_20190610_2358.py
+++ b/seminar/migrations/0064_auto_20190610_2358.py
@ -0,0 +1,162 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.21 on 2019-06-10 21:58
+from __future__ import unicode_literals
+
+from django.conf import settings
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('seminar', '0063_procisteni_migraci'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='cislo',
+            name='rocnik',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, related_name='cisla', to='seminar.Rocnik', verbose_name='ročník'),
+        ),
+        migrations.AlterField(
+            model_name='clanek',
+            name='cislo',
+            field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.PROTECT, to='seminar.Cislo', verbose_name='číslo'),
+        ),
+        migrations.AlterField(
+            model_name='hodnoceni',
+            name='cislo_body',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, related_name='hodnoceni', to='seminar.Cislo', verbose_name='číslo pro body'),
+        ),
+        migrations.AlterField(
+            model_name='hodnoceni',
+            name='problem',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, to='seminar.Problem', verbose_name='problém'),
+        ),
+        migrations.AlterField(
+            model_name='konfery_ucastnici',
+            name='konfera',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='seminar.Konfera', verbose_name='konfera'),
+        ),
+        migrations.AlterField(
+            model_name='konfery_ucastnici',
+            name='resitel',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, to='seminar.Resitel', verbose_name='řešitel'),
+        ),
+        migrations.AlterField(
+            model_name='nastaveni',
+            name='aktualni_cislo',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, to='seminar.Cislo', verbose_name='poslední vydané číslo'),
+        ),
+        migrations.AlterField(
+            model_name='nastaveni',
+            name='aktualni_rocnik',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, to='seminar.Rocnik', verbose_name='aktuální ročník'),
+        ),
+        migrations.AlterField(
+            model_name='novinky',
+            name='autor',
+            field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.SET_NULL, to='seminar.Organizator', verbose_name='Autor novinky'),
+        ),
+        migrations.AlterField(
+            model_name='organizator',
+            name='osoba',
+            field=models.OneToOneField(help_text='osobní údaje organizátora', null=True, on_delete=django.db.models.deletion.SET_NULL, related_name='org', to='seminar.Osoba', verbose_name='osoba'),
+        ),
+        migrations.AlterField(
+            model_name='osoba',
+            name='user',
+            field=models.OneToOneField(blank=True, null=True, on_delete=django.db.models.deletion.DO_NOTHING, to=settings.AUTH_USER_MODEL, verbose_name='uživatel'),
+        ),
+        migrations.AlterField(
+            model_name='pohadka',
+            name='autor',
+            field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.SET_NULL, to='seminar.Organizator', verbose_name='Autor pohádky'),
+        ),
+        migrations.AlterField(
+            model_name='problem',
+            name='autor',
+            field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.SET_NULL, related_name='autor_problemu_problem', to='seminar.Organizator', verbose_name='autor problému'),
+        ),
+        migrations.AlterField(
+            model_name='problem',
+            name='garant',
+            field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.SET_NULL, related_name='garant_problemu_problem', to='seminar.Organizator', verbose_name='garant zadaného problému'),
+        ),
+        migrations.AlterField(
+            model_name='problem',
+            name='nadproblem',
+            field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.SET_NULL, related_name='nadproblem_problem', to='seminar.Problem', verbose_name='nadřazený problém'),
+        ),
+        migrations.AlterField(
+            model_name='reseni',
+            name='text_cely',
+            field=models.OneToOneField(blank=True, null=True, on_delete=django.db.models.deletion.SET_NULL, related_name='reseni_cely_set', to='seminar.Text', verbose_name='Plná verze textu řešení'),
+        ),
+        migrations.AlterField(
+            model_name='reseni_resitele',
+            name='resitele',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, to='seminar.Resitel', verbose_name='řešitel'),
+        ),
+        migrations.AlterField(
+            model_name='resitel',
+            name='osoba',
+            field=models.OneToOneField(null=True, on_delete=django.db.models.deletion.SET_NULL, to='seminar.Osoba', verbose_name='osoba'),
+        ),
+        migrations.AlterField(
+            model_name='resitel',
+            name='skola',
+            field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.SET_NULL, to='seminar.Skola', verbose_name='škola'),
+        ),
+        migrations.AlterField(
+            model_name='skola',
+            name='kontaktni_osoba',
+            field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.SET_NULL, to='seminar.Osoba', verbose_name='Kontaktní osoba'),
+        ),
+        migrations.AlterField(
+            model_name='soustredeni',
+            name='rocnik',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, related_name='soustredeni', to='seminar.Rocnik', verbose_name='ročník'),
+        ),
+        migrations.AlterField(
+            model_name='soustredeni_organizatori',
+            name='organizator',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, to='seminar.Organizator', verbose_name='organizátor'),
+        ),
+        migrations.AlterField(
+            model_name='soustredeni_organizatori',
+            name='soustredeni',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, to='seminar.Soustredeni', verbose_name='soustředění'),
+        ),
+        migrations.AlterField(
+            model_name='soustredeni_ucastnici',
+            name='resitel',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, to='seminar.Resitel', verbose_name='řešitel'),
+        ),
+        migrations.AlterField(
+            model_name='soustredeni_ucastnici',
+            name='soustredeni',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, to='seminar.Soustredeni', verbose_name='soustředění'),
+        ),
+        migrations.AlterField(
+            model_name='tema',
+            name='rocnik',
+            field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.PROTECT, to='seminar.Rocnik', verbose_name='ročník'),
+        ),
+        migrations.AlterField(
+            model_name='uloha',
+            name='cislo_deadline',
+            field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.PROTECT, related_name='deadlinove_ulohy', to='seminar.Cislo', verbose_name='číslo deadlinu'),
+        ),
+        migrations.AlterField(
+            model_name='uloha',
+            name='cislo_reseni',
+            field=models.ForeignKey(blank=True, help_text='Číslo s řešením úlohy, jen pro úlohy', null=True, on_delete=django.db.models.deletion.PROTECT, related_name='resene_ulohy', to='seminar.Cislo', verbose_name='číslo řešení'),
+        ),
+        migrations.AlterField(
+            model_name='uloha',
+            name='cislo_zadani',
+            field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.PROTECT, related_name='zadane_ulohy', to='seminar.Cislo', verbose_name='číslo zadání'),
+        ),
+    ]
--- a/seminar/models.py
+++ b/seminar/models.py
@ -9,7 +9,7 @@ from django.conf import settings
 from django.utils.encoding import python_2_unicode_compatible
 from django.utils.encoding import force_text
 from django.utils.text import slugify
-from django.core.urlresolvers import reverse
+from django.urls import reverse
 from django.core.cache import cache
 from django.core.exceptions import ObjectDoesNotExist
 from django.utils.text import get_valid_filename
@ -64,7 +64,7 @@ class Osoba(SeminarModelBase):

 	# User, pokud má na webu účet
 	user = models.OneToOneField(settings.AUTH_USER_MODEL, blank=True, null=True, 
-				verbose_name='uživatel')
+				verbose_name='uživatel', on_delete=models.DO_NOTHING)

 	# Pohlaví. Že ho neznáme se snad nestane (a ušetří to práci při programování)
 	pohlavi_muz = models.BooleanField('pohlaví (muž)', default=False)
@ -185,7 +185,7 @@ class Skola(SeminarModelBase):
 		help_text='Neveřejná poznámka ke škole (plain text)')
 	
 	kontaktni_osoba = models.ForeignKey(Osoba, verbose_name='Kontaktní osoba', 
-			blank=True, null=True)
+			blank=True, null=True, on_delete=models.SET_NULL)

 	def __str__(self):
 		return '{}, {}, {}'.format(self.nazev, self.ulice, self.mesto)
@ -204,7 +204,8 @@ class Prijemce(SeminarModelBase):
 		help_text='Neveřejná poznámka k příemci čísel (plain text)')

 	osoba = models.OneToOneField(Osoba, verbose_name='komu', blank=False, null=False,
-		help_text='Které osobě či na jakou adresu se mají zasílat čísla')
+		help_text='Které osobě či na jakou adresu se mají zasílat čísla',
+		on_delete=models.CASCADE)

 	# FIXME: možná chceme něco jako vazbu na osobu XOR školu a počet kusů k zaslání
 	# FIXME: a možná taky posílání na mail a možná taky přes něj chceme posílat i řešitelům
@ -225,9 +226,12 @@ class Resitel(SeminarModelBase):
 	# Interní ID
 	id = models.AutoField(primary_key = True)

-	osoba = models.OneToOneField(Osoba, blank=False, null=True, verbose_name='osoba') # FIXME opravit po prvni migraci
+	osoba = models.OneToOneField(Osoba, blank=False, null=True, verbose_name='osoba',
+		on_delete=models.SET_NULL) # FIXME opravit po prvni migraci
+	

-	skola = models.ForeignKey(Skola, blank=True, null=True, verbose_name='škola')
+	skola = models.ForeignKey(Skola, blank=True, null=True, verbose_name='škola',
+		on_delete=models.SET_NULL)

 	# Očekávaný rok maturity a vyřazení z aktivních řešitelů
 	rok_maturity = models.IntegerField('rok maturity', blank=True, null=True)
@ -387,7 +391,8 @@ class Cislo(SeminarModelBase):
 	# Interní ID
 	id = models.AutoField(primary_key = True)

-	rocnik = models.ForeignKey(Rocnik, verbose_name='ročník', related_name='cisla', db_index=True)
+	rocnik = models.ForeignKey(Rocnik, verbose_name='ročník', related_name='cisla',
+		db_index=True,on_delete=models.PROTECT)

 	cislo = models.CharField('název čísla', max_length=32, db_index=True,
 		help_text='Většinou jen "1", vyjímečně "7-8", lexikograficky určuje pořadí v ročníku!')
@ -467,7 +472,8 @@ class Organizator(SeminarModelBase):
 # zmena dedicnosti z models.Model na SeminarModelBase, potencialni vznik bugu

 	osoba = models.OneToOneField(Osoba, verbose_name='osoba', related_name='org',
-		help_text='osobní údaje organizátora', null=True, blank=False) #FIXME opravit po migraci
+		help_text='osobní údaje organizátora', null=True, blank=False,
+		on_delete=models.SET_NULL) #FIXME opravit po migraci

 	vytvoreno = models.DateTimeField(
 		'Vytvořeno',
@ -517,7 +523,8 @@ class Soustredeni(SeminarModelBase):
 	# Interní ID
 	id = models.AutoField(primary_key = True)

-	rocnik = models.ForeignKey(Rocnik, verbose_name='ročník', related_name='soustredeni')
+	rocnik = models.ForeignKey(Rocnik, verbose_name='ročník', related_name='soustredeni',
+		on_delete=models.PROTECT)

 	datum_zacatku = models.DateField('datum začátku', blank=True, null=True,
 		help_text='První den soustředění')
@ -589,7 +596,8 @@ class Problem(SeminarModelBase):

 	# Problém má podproblémy
 	nadproblem = models.ForeignKey('self', verbose_name='nadřazený problém',
-		related_name='nadproblem_%(class)s', null=True, blank=True)
+		related_name='nadproblem_%(class)s', null=True, blank=True,
+		on_delete=models.SET_NULL)

 	STAV_NAVRH = 'navrh'
 	STAV_ZADANY = 'zadany'
@ -610,10 +618,12 @@ class Problem(SeminarModelBase):
 		help_text='Neveřejný návrh úlohy, návrh řešení, text zadání, poznámky ...')

 	autor = models.ForeignKey(Organizator, verbose_name='autor problému', 
-		related_name='autor_problemu_%(class)s', null=True, blank=True)
+		related_name='autor_problemu_%(class)s', null=True, blank=True,
+		on_delete=models.SET_NULL)

 	garant = models.ForeignKey(Organizator, verbose_name='garant zadaného problému', 
-		related_name='garant_problemu_%(class)s', null=True, blank=True)
+		related_name='garant_problemu_%(class)s', null=True, blank=True,
+		on_delete=models.SET_NULL)

 	opravovatele = models.ManyToManyField(Organizator, verbose_name='opravovatelé', 
 		blank=True, related_name='opravovatele_%(class)s')
@ -676,7 +686,8 @@ class Tema(Problem):
 	tema_typ = models.CharField('Typ tématu', max_length=16, choices=TEMA_CHOICES, 
 		blank=False, default=TEMA_TEMA)

-	rocnik = models.ForeignKey(Rocnik, verbose_name='ročník',blank=True, null=True)
+	rocnik = models.ForeignKey(Rocnik, verbose_name='ročník',blank=True, null=True,
+		on_delete=models.PROTECT)

 	def kod_v_rocniku(self):
 		if self.stav == 'zadany':
@ -691,7 +702,8 @@ class Clanek(Problem):
 		verbose_name = 'Článek'
 		verbose_name_plural = 'Články'
 	
-	cislo = models.ForeignKey(Cislo, verbose_name='číslo', blank=True, null=True)
+	cislo = models.ForeignKey(Cislo, verbose_name='číslo', blank=True, null=True,
+		on_delete=models.PROTECT)

 	# má OneToOneField s:
 	# ClanekNode
@ -730,14 +742,15 @@ class Uloha(Problem):
 		verbose_name_plural = 'Úlohy'
 	
 	cislo_zadani = models.ForeignKey(Cislo, verbose_name='číslo zadání', blank=True, 
-		null=True, related_name='zadane_ulohy')
+		null=True, related_name='zadane_ulohy', on_delete=models.PROTECT)
 	
 	cislo_deadline = models.ForeignKey(Cislo, verbose_name='číslo deadlinu', blank=True, 
-		null=True, related_name='deadlinove_ulohy')
+		null=True, related_name='deadlinove_ulohy', on_delete=models.PROTECT)

 	cislo_reseni = models.ForeignKey(Cislo, verbose_name='číslo řešení', blank=True, 
 		null=True, related_name='resene_ulohy',
-		help_text='Číslo s řešením úlohy, jen pro úlohy')
+		help_text='Číslo s řešením úlohy, jen pro úlohy',
+		on_delete=models.PROTECT)

 	max_body = models.DecimalField(max_digits=8, decimal_places=1, verbose_name='maximum bodů', 
 		blank=True, null=True)
@ -790,7 +803,8 @@ class Reseni(SeminarModelBase):
 		 default=FORMA_EMAIL)

 	text_cely = models.OneToOneField(Text, verbose_name='Plná verze textu řešení', 
-		blank=True, null=True, related_name="reseni_cely_set")
+		blank=True, null=True, related_name="reseni_cely_set",
+		on_delete=models.SET_NULL)

 	text_zkraceny = models.ManyToManyField(Text, verbose_name='zkrácené verze řešení',
 		help_text='Seznam úryvků z řešení',related_name="reseni_zkraceny_set")
@ -829,11 +843,11 @@ class Hodnoceni(SeminarModelBase):
 		blank=False, null=False)

 	cislo_body = models.ForeignKey(Cislo, verbose_name='číslo pro body', 
-		related_name='hodnoceni', blank=False, null=False)
+		related_name='hodnoceni', blank=False, null=False, on_delete=models.PROTECT)

-	reseni = models.ForeignKey(Reseni, verbose_name='řešení')
+	reseni = models.ForeignKey(Reseni, verbose_name='řešení', on_delete=models.CASCADE)

-	problem = models.ForeignKey(Problem, verbose_name='problém')
+	problem = models.ForeignKey(Problem, verbose_name='problém', on_delete=models.PROTECT)

 	def __str__(self):
 		return "{}, {}, {}".format(self.problem, self.reseni, self.body)
@ -884,7 +898,8 @@ class PrilohaReseni(SeminarModelBase):
 	# Interní ID
 	id = models.AutoField(primary_key = True)

-	reseni = models.ForeignKey(Reseni, verbose_name='řešení', related_name='prilohy')
+	reseni = models.ForeignKey(Reseni, verbose_name='řešení', related_name='prilohy',
+		on_delete=models.CASCADE)

 	vytvoreno = models.DateTimeField('vytvořeno', default=timezone.now, blank=True, editable=False)

@ -915,7 +930,8 @@ class Pohadka(SeminarModelBase):

 		# Při nahrávání z TeXu není vyplnění vyžadováno, v adminu je
 		null=True,
-		blank=False
+		blank=False,
+		on_delete=models.SET_NULL
 	)

 	vytvoreno = models.DateTimeField(
@ -946,9 +962,10 @@ class Soustredeni_Ucastnici(SeminarModelBase):
 	# Interní ID
 	id = models.AutoField(primary_key = True)

-	resitel = models.ForeignKey(Resitel, verbose_name='řešitel')
+	resitel = models.ForeignKey(Resitel, verbose_name='řešitel', on_delete=models.PROTECT)

-	soustredeni = models.ForeignKey(Soustredeni, verbose_name='soustředění')
+	soustredeni = models.ForeignKey(Soustredeni, verbose_name='soustředění',
+		on_delete=models.PROTECT)

 	poznamka = models.TextField('neveřejná poznámka', blank=True,
 		help_text='Neveřejná poznámka k účasti (plain text)')
@ -970,9 +987,11 @@ class Soustredeni_Organizatori(SeminarModelBase):
 	# Interní ID
 	id = models.AutoField(primary_key = True)

-	organizator = models.ForeignKey(Organizator, verbose_name='organizátor')
+	organizator = models.ForeignKey(Organizator, verbose_name='organizátor',
+		on_delete=models.PROTECT)

-	soustredeni = models.ForeignKey(Soustredeni, verbose_name='soustředění')
+	soustredeni = models.ForeignKey(Soustredeni, verbose_name='soustředění',
+		on_delete=models.PROTECT)

 	poznamka = models.TextField('neveřejná poznámka', blank=True,
 		help_text='Neveřejná poznámka k účasti organizátora (plain text)')
@ -1003,6 +1022,7 @@ class Konfera(models.Model):
 	organizator = models.ForeignKey(Organizator, verbose_name='organizátor', related_name='konfery',
 			on_delete = models.SET_NULL, null=True)

+	# FIXME: Umíme omezit jen na účastníky daného soustřeďka?
 	ucastnici = models.ManyToManyField(Resitel, verbose_name='účastníci konfery',
 		help_text='Seznam účastníků konfery', through='Konfery_Ucastnici')

@ -1052,9 +1072,9 @@ class Reseni_Resitele(models.Model):
 	# Interní ID
 	id = models.AutoField(primary_key = True)

-	resitele = models.ForeignKey(Resitel, verbose_name='řešitel')
+	resitele = models.ForeignKey(Resitel, verbose_name='řešitel', on_delete=models.PROTECT)

-	reseni = models.ForeignKey(Reseni, verbose_name='řešení')
+	reseni = models.ForeignKey(Reseni, verbose_name='řešení', on_delete=models.CASCADE)

 	# podil - jakou merou se ktery resitel podilel na danem reseni
 	#	- pouziti v budoucnu, pokud by resitele nemeli dostat vsichni stejne bodu za spolecne reseni
@ -1075,9 +1095,9 @@ class Konfery_Ucastnici(models.Model):
 	# Interní ID
 	id = models.AutoField(primary_key = True)

-	resitel = models.ForeignKey(Resitel, verbose_name='řešitel')
+	resitel = models.ForeignKey(Resitel, verbose_name='řešitel', on_delete=models.PROTECT)

-	konfera = models.ForeignKey(Konfera, verbose_name='konfera')
+	konfera = models.ForeignKey(Konfera, verbose_name='konfera', on_delete=models.CASCADE)

 	poznamka = models.TextField('neveřejná poznámka', blank=True,
 		help_text='Neveřejná poznámka k účasti (plain text)')
@ -1099,7 +1119,8 @@ class Obrazek(SeminarModelBase):
 			null=True, blank=True)

 	text = models.ForeignKey(Text, verbose_name='text', 
-			help_text='text, ve kterém se obrázek vyskytuje', null=False, blank=False) 
+			help_text='text, ve kterém se obrázek vyskytuje',
+			null=False, blank=False, on_delete=models.CASCADE) 

 	do_cisla_barevny = models.FileField('barevný obrázek do čísla', 
 			help_text = 'Barevná verze obrázku do čísla', 
@ -1318,10 +1339,11 @@ class Nastaveni(SingletonModel):
 		db_table = 'seminar_nastaveni'
 		verbose_name = 'Nastavení semináře'

-	aktualni_rocnik = models.ForeignKey(Rocnik, verbose_name='aktuální ročník', null=False)
+	aktualni_rocnik = models.ForeignKey(Rocnik, verbose_name='aktuální ročník',
+		null=False, on_delete=models.PROTECT)

 	aktualni_cislo = models.ForeignKey(Cislo, verbose_name='poslední vydané číslo', 
-		null=False)
+		null=False, on_delete=models.PROTECT)

 	def __str__(self):
 		return 'Nastavení semináře'
@ -1355,7 +1377,8 @@ class Novinky(models.Model):
 			],
 			options={'quality': 95})

-	autor = models.ForeignKey(Organizator, verbose_name='Autor novinky', null=True)
+	autor = models.ForeignKey(Organizator, verbose_name='Autor novinky', null=True,
+		on_delete=models.SET_NULL)

 	zverejneno = models.BooleanField('Zveřejněno', default=False)

--- a/seminar/templatetags/mam_menu.py
+++ b/seminar/templatetags/mam_menu.py
@ -10,6 +10,6 @@ def seminar_rocniky(parser, token):
        'rocniky': Rocnik.objects.all()
    }

-@register.assignment_tag
+@register.simple_tag
 def aktualni_rocniky():
    return Rocnik.objects.all()
--- a/seminar/urls.py
+++ b/seminar/urls.py
@ -9,100 +9,100 @@ staff_member_required = user_passes_test(lambda u: u.is_staff)

 urlpatterns = [
 	# REDIRECTy
-	url(r'^jak-resit/$', RedirectView.as_view(url='/co-je-MaM/jak-resit/')),
+	url('jak-resit/', RedirectView.as_view(url='/co-je-MaM/jak-resit/')),

 	# Organizatori
-	url(r'^co-je-MaM/organizatori/$', views.CojemamOrganizatoriView.as_view(), name='organizatori'),
-	url(r'^co-je-MaM/organizatori/organizovali/$', views.CojemamOrganizatoriStariView.as_view(), name='stari_organizatori'),
+	url('co-je-MaM/organizatori/', views.CojemamOrganizatoriView.as_view(), name='organizatori'),
+	url('co-je-MaM/organizatori/organizovali/', views.CojemamOrganizatoriStariView.as_view(), name='stari_organizatori'),

 	# Archiv
-	url(r'^archiv/cisla/$', views.ArchivView.as_view()),
-	url(r'^archiv/temata/$', views.ArchivTemataView.as_view()),
+	url('archiv/cisla/', views.ArchivView.as_view()),
+	url('archiv/temata/', views.ArchivTemataView.as_view()),

-	url(r'^rocnik/(?P<rocnik>\d+)/$', views.RocnikView.as_view(), name='seminar_rocnik'),
-	#url(r'^cislo/(?P<rocnik>\d+)\.(?P<cislo>[0-9-]+)/$', views.CisloView.as_view(), name='seminar_cislo'),
-	url(r'^problem/(?P<pk>\d+)/$', views.ProblemView.as_view(), name='seminar_problem'),
-	#url(r'^problem/(?P<pk>\d+)/(?P<prispevek>\d+)/$', views.PrispevekView.as_view(), name='seminar_problem_prispevek'),
+	url('rocnik/<int:rocnik>/', views.RocnikView.as_view(), name='seminar_rocnik'),
+	#url('cislo/<int:rocnik>.<int:cislo>/', views.CisloView.as_view(), name='seminar_cislo'),
+	url('problem/<int:pk>/', views.ProblemView.as_view(), name='seminar_problem'),
+	#url('problem/(?P<pk>\d+)/(?P<prispevek>\d+)/', views.PrispevekView.as_view(), name='seminar_problem_prispevek'),

 	# Soustredeni
 	url(
-		r'^soustredeni/probehlo/$',
+		'soustredeni/probehlo/',
 		views.SoustredeniListView.as_view(),
 		name='seminar_seznam_soustredeni'
 	),
 	url(
-		r'^soustredeni/probehlo/(?P<soustredeni>\d+)/$',
+		'soustredeni/probehlo/<int:soustredeni>/',
 		views.SoustredeniView.as_view(),
 		name='seminar_soustredeni'
 	),
 	url(
-		r'^soustredeni/(?P<soustredeni>\d+)/seznam_ucastniku$',
+		'soustredeni/<int:soustredeni>/seznam_ucastniku',
 		staff_member_required(views.SoustredeniUcastniciView.as_view()),
 		name='soustredeni_ucastnici'
 	),
 	url(
-		r'^soustredeni/(?P<soustredeni>\d+)/maily_ucastniku$',
+		'soustredeni/<int:soustredeni>/maily_ucastniku',
 		staff_member_required(views.SoustredeniMailyUcastnikuView.as_view()),
 		name='maily_ucastniku'
 	),
 	url(
-		r'^soustredeni/(?P<soustredeni>\d+)/export_ucastniku$',
+		'soustredeni/<int:soustredeni>/export_ucastniku',
 		staff_member_required(views.soustredeniUcastniciExportView),
 		name='soustredeni_ucastnici_export'
 	),
 	url(
-		r'^soustredeni/(?P<soustredeni>\d+)/fotogalerie/',
+		'soustredeni/<int:soustredeni>/fotogalerie/',
 		include('galerie.urls')
 	),

 	# Zadani
-	url(r'^zadani/aktualni/$', views.AktualniZadaniView, name='seminar_aktualni_zadani'),
-	url(r'^zadani/temata/$', views.ZadaniTemataView, name='seminar_temata'),
-	#url(r'^zadani/vysledkova-listina/$', views.ZadaniAktualniVysledkovkaView, name='seminar_vysledky'),
-	url(r'^$', views.TitulniStranaView.as_view(), name='titulni_strana'),
-	url(r'^stare-novinky/$', views.StareNovinkyView.as_view(), name='stare_novinky'),
+	url('zadani/aktualni/', views.AktualniZadaniView, name='seminar_aktualni_zadani'),
+	url('zadani/temata/', views.ZadaniTemataView, name='seminar_temata'),
+	#url('zadani/vysledkova-listina/', views.ZadaniAktualniVysledkovkaView, name='seminar_vysledky'),
+	url('', views.TitulniStranaView.as_view(), name='titulni_strana'),
+	url('stare-novinky/', views.StareNovinkyView.as_view(), name='stare_novinky'),

 	# Clanky
-	url(r'^clanky/resitel/$', views.ClankyResitelView.as_view(), name='clanky_resitel'),
-	#url(r'^clanky/org/$', views.ClankyOrganizatorView.as_view(), name='clanky_organizator'),
+	url('clanky/resitel/', views.ClankyResitelView.as_view(), name='clanky_resitel'),
+	#url('clanky/org/', views.ClankyOrganizatorView.as_view(), name='clanky_organizator'),

 	# Aesop
-	url(r'^aesop-export/mam-rocnik-(?P<prvni_rok>\d+)\.csv$', export.ExportRocnikView.as_view(), name='seminar_export_rocnik'),
-	url(r'^aesop-export/mam-sous-(?P<datum_zacatku>[\d-]+)\.csv$', export.ExportSousView.as_view(), name='seminar_export_sous'),
-	url(r'^aesop-export/index.csv$', export.ExportIndexView.as_view(), name='seminar_export_index'),
+	url('aesop-export/mam-rocnik-<int:prvni_rok>.csv', export.ExportRocnikView.as_view(), name='seminar_export_rocnik'),
+	url('aesop-export/mam-sous-<str:datum_zacatku>.csv', export.ExportSousView.as_view(), name='seminar_export_sous'),
+	url('aesop-export/index.csv', export.ExportIndexView.as_view(), name='seminar_export_index'),

 	# Stranky viditelne pouze pro orgy:
 	#url(
-	#    r'^rocnik/(?P<rocnik>\d+)/vysledkovka.tex$',
+	#    'rocnik/(?P<rocnik>\d+)/vysledkovka.tex',
 	#    staff_member_required(views.RocnikVysledkovkaView.as_view()),
 	#    name='seminar_cislo_vysledkovka'
 	#),
-	#url(r'^cislo/(?P<rocnik>\d+).(?P<cislo>[0-9-]+)/vysledkovka.tex$',
+	#url('cislo/(?P<rocnik>\d+).(?P<cislo>[0-9-]+)/vysledkovka.tex',
 	 #   staff_member_required(views.CisloVysledkovkaView.as_view()), name='seminar_cislo_vysledkovka'),
-	url(r'^cislo/(?P<rocnik>\d+).(?P<cislo>[0-9-]+)/obalky.pdf$',
+	url('cislo/<int:rocnik>.<int:cislo>/obalky.pdf',
 		staff_member_required(views.cisloObalkyView), name='seminar_cislo_obalky'),

-	#url(r'^cislo/(?P<rocnik>\d+).(?P<cislo>[0-9-]+)/tituly.tex$',
+	#url('cislo/(?P<rocnik>\d+).(?P<cislo>[0-9-]+)/tituly.tex',
 	 #   staff_member_required(views.TitulyView), name='seminar_cislo_titul'),
-	url(r'^stav$',
+	url('stav',
 		staff_member_required(views.StavDatabazeView), name='stav_databaze'),
-	url(r'^cislo/(?P<rocnik>\d+).(?P<cislo>[0-9-]+)/obalkovani$',
+	url('cislo/<int:rocnik>.<int:cislo>/obalkovani',
 		staff_member_required(views.obalkovaniView), name='seminar_cislo_resitel_obalkovani'),
-	url(r'^cislo/(?P<rocnik>\d+).(?P<cislo>[0-9-]+)/tex-download.json$',
+	url('cislo/<int:rocnik>.<int:cislo>/tex-download.json',
 		staff_member_required(views.texDownloadView), name='seminar_tex_download'),
-	url(r'^soustredeni/(?P<soustredeni>\d+)/obalky.pdf',
+	url('soustredeni/<int:soustredeni>/obalky.pdf',
 		staff_member_required(views.soustredeniObalkyView), name='seminar_soustredeni_obalky'),

-	url(r'^tex-upload/login/$', views.LoginView, name='seminar_login'),
+	url('tex-upload/login/', views.LoginView, name='seminar_login'),
 	url(
-		r'^tex-upload/$',
+		'tex-upload/',
 		staff_member_required(views.texUploadView),
 		name='seminar_tex_upload'
 	),
-	url(r'^prihlaska/$',views.get_name),
+	url('prihlaska/',views.get_name),

 	# Ceka na autocomplete v3
-	# url(r'^autocomplete/organizatori/$',
+	# url('autocomplete/organizatori/',
 	# staff_member_required(views.OrganizatorAutocomplete.as_view()),
 	# name='seminar_autocomplete_organizator')

--- a/seminar/views.py
+++ b/seminar/views.py
@ -2,7 +2,7 @@

 from django.shortcuts import get_object_or_404, render
 from django.http import HttpResponse, HttpResponseRedirect, HttpResponseForbidden, JsonResponse
-from django.core.urlresolvers import reverse
+from django.urls import reverse
 from django.core.exceptions import PermissionDenied, ObjectDoesNotExist
 from django.views import generic
 from django.utils.translation import ugettext as _