Kateřina Č
4 years ago
2 changed files with 47 additions and 0 deletions
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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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