Vzor migrace pro create
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split-apps-meta/create-ct-hack.py
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split-apps-meta/create-ct-hack.py
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# Správná migrace vypadá takto:
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# Generated by Django 3.2.23 on 2023-12-11 19:19
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def nastav_nove_contenttypes(apps, schema_editor):
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ContentType = apps.get_model('contenttypes', 'ContentType')
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old_ct = ContentType.objects.filter(app_label='seminar', model='nastaveni')
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# Pozn: tohle může být prázdné (pokud Django nedostalo signál o dokončených migracích, např. při vyrábění databáze z nuly)
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# Ale .update to nevadí…
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old_ct.update(app_label='various')
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def nastav_stare_contenttypes(apps, schema_editor):
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ContentType = apps.get_model('contenttypes', 'ContentType')
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new_ct = ContentType.objects.filter(app_label='various', model='nastaveni')
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new_ct.update(app_label='seminar')
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class Migration(migrations.Migration):
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initial = True
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dependencies = [
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('seminar', '0115_alter_nastaveni_options'),
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]
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operations = [
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migrations.CreateModel(
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name='Nastaveni',
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fields=[
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('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
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('cena_sous', models.IntegerField(default=1000, verbose_name='Účastnický poplatek za soustředění')),
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],
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options={
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'verbose_name': 'Nastavení semináře',
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'db_table': 'seminar_nastaveni',
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'managed': False,
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},
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),
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migrations.RunPython(nastav_nove_contenttypes, nastav_stare_contenttypes),
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]
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#Hack: zkrácení
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def nastav_nove_contenttypes(apps, schema_editor):
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ContentType = apps.get_model('contenttypes', 'ContentType')
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for m in ('resitel', 'organizator', 'osoba', 'skola', 'prijemce'):
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ContentType.objects.filter(app_label='seminar', model=m).update(app_label='personalni')
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def nastav_stare_contenttypes(apps, schema_editor):
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ContentType = apps.get_model('contenttypes', 'ContentType')
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for m in ('resitel', 'organizator', 'osoba', 'skola', 'prijemce'):
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ContentType.objects.filter(app_label='personalni', model=m).update(app_label='seminar')
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@ -1,4 +1,5 @@
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Prostě zkopírovat vedle, s původními (=správnými) related names.
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makemigrations
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! Doplnit hack kolem content-types
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doplnit závislost na unmanage
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migrate
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