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# Generated by Django 2.2.16 on 2020-09-04 12:06
from django.db import migrations
from logging import getLogger
log = getLogger(__name__)
# Oprava migrací 0065 a 0066, kde jsem špatně pochopil django-polymorphic
# Pomocná funkce -- děláme to samé pro obě polymorfní hierarchie
def fix_ctypes(parent: str, children, apps, schema_editor):
Parent = apps.get_model('seminar', parent)
ContentType = apps.get_model('contenttypes', 'ContentType')
# Nejdřív všechno smažeme:
Parent.objects.update(polymorphic_ctype=None)
# Opravíme děti
for clsname in children:
Model = apps.get_model('seminar', clsname)
ct = ContentType.objects.get_for_model(Model)
Model.objects.update(polymorphic_ctype=ct)
# Ostatní instance mají mít explicitně content type pro rodiče
new_ct = ContentType.objects.get_for_model(Parent)
for obj in Parent.objects.filter(polymorphic_ctype__isnull=True):
log.warn(f"{parent} \"{obj}\" neměl content type -- nejspíš to je instance přímo {parent}!")
obj.polymorphic_ctype=new_ct
obj.save()
def fix_treenode(apps, schema_editor):
children = ['RocnikNode', 'CisloNode', 'MezicisloNode', 'TemaVCisleNode',
'OrgTextNode', 'UlohaZadaniNode', 'UlohaVzorakNode', 'PohadkaNode',
'TextNode', 'CastNode', 'ReseniNode']
fix_ctypes("TreeNode", children, apps, schema_editor)
def fix_problem(apps, schema_editor):
children = ['Tema', 'Clanek', 'Uloha'] # FIXME: Konfera z nějakého důvodu tenhle field vůbec nemá, asi je to špatně.
fix_ctypes("Problem", children, apps, schema_editor)
class Migration(migrations.Migration):
dependencies = [
('seminar', '0077_auto_20200318_2146'),
]
operations = [
migrations.RunPython(fix_treenode, migrations.RunPython.noop),
migrations.RunPython(fix_problem, migrations.RunPython.noop),
]