diff --git a/seminar/admin.py b/seminar/admin.py
index 4da32e96..849ca696 100644
--- a/seminar/admin.py
+++ b/seminar/admin.py
@@ -1,7 +1,8 @@
 from django.contrib import admin
 from django.contrib.auth.models import Group
 from django.db import models
-from django.forms import widgets
+from django.forms import widgets, ModelForm
+from django.core.exceptions import ValidationError
 
 from polymorphic.admin import PolymorphicParentModelAdmin, PolymorphicChildModelAdmin, PolymorphicChildModelFilter
 from reversion.admin import VersionAdmin
@@ -12,11 +13,43 @@ from solo.admin import SingletonModelAdmin
 # Todo: reversion
 
 import seminar.models as m
+import seminar.treelib as tl
 
 admin.site.register(m.Skola)
 admin.site.register(m.Prijemce)
 admin.site.register(m.Rocnik)
-admin.site.register(m.Cislo)
+
+class CisloForm(ModelForm):
+	class Meta:
+		model = m.Cislo
+		fields = '__all__'
+		
+	def clean(self):
+		print("Cleaning...")
+		print(self.cleaned_data)
+		if self.cleaned_data.get('verejne_db') == False:
+			return self.cleaned_data
+		cn = m.CisloNode.objects.get(cislo=self.instance)
+		for ch in tl.all_children(cn):
+			if isinstance(ch, m.TemaVCisleNode):
+				if ch.tema.stav not in \
+					(m.Problem.STAV_ZADANY, m.Problem.STAV_VYRESENY):
+						raise ValidationError('Téma %(tema)s není zadané ani vyřešené', params={'tema':ch.tema})
+				
+			if isinstance(ch, m.UlohaZadaniNode) or isinstance(ch, m.UlohaVzorakNode):
+				if ch.uloha.stav not in \
+					(m.Problem.STAV_ZADANY, m.Problem.STAV_VYRESENY):
+					raise ValidationError('Úloha %(uloha)s není zadaná ani vyřešená', params={'uloha':ch.uloha})
+			if isinstance(ch, m.ReseniNode):
+				for problem in ch.reseni.problem_set:
+					if problem not in \
+						(m.Problem.STAV_ZADANY, m.Problem.STAV_VYRESENY):
+						raise ValidationError('Problém %s není zadaný ani vyřešený', code=problem)
+		return self.cleaned_data
+
+@admin.register(m.Cislo)
+class CisloAdmin(admin.ModelAdmin):
+	form = CisloForm
 
 @admin.register(m.Osoba)
 class OsobaAdmin(admin.ModelAdmin):