# Generated by Django 2.1.3 on 2018-12-21 16:11
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from django.db import migrations, models
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import django.db.models.deletion
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class Migration(migrations.Migration):
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dependencies = [
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('exam', '0003_exam_published'),
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]
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def migrate_m2m_to_fk(apps, schema_editor):
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Exam = apps.get_model("exam", "Exam")
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for ex in Exam.objects.all():
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for genpap in ex.generated.all():
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genpap.exam_own = ex
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genpap.save()
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def migrate_fk_to_m2m(apps, schema_editor):
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genPaper = apps.get_model("exam", "GeneratedPaper")
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for gp in genPaper.objects.all():
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if gp.exam:
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gp.exam.generated.add(gp)
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gp.exam.save()
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operations = [
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migrations.AddField(
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model_name='generatedpaper',
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name='exam_own',
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field=models.ForeignKey(default=1, on_delete=django.db.models.deletion.CASCADE, to='exam.Exam'),
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preserve_default=False,
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),
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migrations.RunPython(migrate_m2m_to_fk, migrate_fk_to_m2m)
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]
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