48 lines
1.2 KiB
Python
48 lines
1.2 KiB
Python
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# -*- coding: utf-8 -*-
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# Generated by Django 1.11.20 on 2019-05-23 21:54
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from __future__ import unicode_literals
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from django.db import migrations
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def generuj_RocnikNody_a_CisloNody(apps,schema_editor):
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Rocnik = apps.get_model('seminar', 'Rocnik')
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RocnikNode = apps.get_model('seminar', 'RocnikNode')
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Cislo = apps.get_model('seminar', 'Cislo')
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CisloNode = apps.get_model('seminar', 'CisloNode')
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last_rn = None # last_* slouží k navázání následníků
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for r in Rocnik.objects.all():
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rn = RocnikNode.objects.create(rocnik=r)
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rn.save()
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rn.root = rn
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rn.save()
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if last_rn:
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last_rn.succ = rn
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last_rn.save()
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last_rn = rn
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last_cn = None
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for c in Cislo.objects.filter(rocnik=r):
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cn = CisloNode.objects.create(cislo=c, root=rn)
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cn.save()
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if last_cn: # Jsme něčí následník
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last_cn.succ = cn
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last_cn.save()
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else: # Jsme první v řadě, takže se musíme přidat jako first_child RočníkNodu
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rn.first_child = cn
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rn.save()
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last_cn = cn
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class Migration(migrations.Migration):
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dependencies = [
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('seminar', '0055_smazat_nemigrovane_zastarale_veci'),
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]
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operations = [
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migrations.RunPython(generuj_RocnikNody_a_CisloNody),
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]
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