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44 lines
1.3 KiB
44 lines
1.3 KiB
5 years ago
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# Generated by Django 2.2.13 on 2020-06-17 19:06
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from django.db import migrations, models
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import django.db.models.deletion
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from seminar.treelib import get_parent
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def najdi_cislo(apps, schema_editor):
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#
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Clanek = apps.get_model('seminar', 'Clanek')
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Hodnoceni = apps.get_model('seminar', 'Hodnoceni')
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Reseni = apps.get_model('seminar', 'Reseni')
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ReseniNode = apps.get_model('seminar', 'ReseniNode')
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CisloNode = apps.get_model('seminar', 'CisloNode')
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for c in Clanek.objects.all():
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reseni = c.reseni_set
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if (len(reseni) != 1):
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raise ValueError("Článek k sobě má nejedno řešení!")
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r = reseni[0]
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aktualniNode = r.reseninode
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while aktualniNode is not None:
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if isinstance(aktualniNode, CisloNode):
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c.cislo = aktualniNode.cislo
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c.save()
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break
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aktualniNode = get_parent()
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class Migration(migrations.Migration):
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dependencies = [
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('seminar', '0083_auto_20200506_1952'),
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]
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operations = [
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migrations.AddField(
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model_name='clanek',
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name='cislo',
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field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.PROTECT, related_name='vydane_clanky', to='seminar.Cislo', verbose_name='číslo vydání'),
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),
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migrations.RunPython(najdi_cislo),
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]
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