# Generated by Django 2.2.4 on 2019-08-13 19:36

from django.db import migrations, models
import django.db.models.deletion

def vyrob_treenodum_ctypes(apps, schema_editor):
	# Kód zkopírovaný z dokumentace: https://django-polymorphic.readthedocs.io/en/stable/migrating.html
	# NOTE: Tahle migrace je špatně, 0087 ji opravuje. Možno squashnout pryč.
	TreeNode = apps.get_model('seminar', 'TreeNode')
	ContentType = apps.get_model('contenttypes', 'ContentType')
	
	new_ct = ContentType.objects.get_for_model(TreeNode)
	TreeNode.objects.filter(polymorphic_ctype__isnull=True).update(polymorphic_ctype=new_ct)



class Migration(migrations.Migration):
	
	dependencies = [
		('contenttypes', '0002_remove_content_type_name'),
		('seminar', '0064_auto_20190610_2358'),
	]
	
	operations = [
		migrations.AddField(
			model_name='treenode',
			name='polymorphic_ctype',
			field=models.ForeignKey(editable=False, null=True, on_delete=django.db.models.deletion.CASCADE, related_name='polymorphic_seminar.treenode_set+', to='contenttypes.ContentType'),
		),
		migrations.RunPython(vyrob_treenodum_ctypes, migrations.RunPython.noop, elidable=True),
	]