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9b3b759254
Answers to the relationship questions have been moved from the relationship to another model RelationshipAnswerSet. A new answer set is created each time a user answers the relationship questions. Resolves #16 Resolves #17 Resolves #18
79 lines
2.5 KiB
Python
79 lines
2.5 KiB
Python
# Generated by Django 2.2.10 on 2020-03-04 12:09
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import logging
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from django.db import migrations, models
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import django.db.models.deletion
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import django.utils.timezone
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logger = logging.getLogger(__name__)
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def forward_migration(apps, schema_editor):
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"""
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Move existing data forward into answer sets from the relationship.
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"""
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Relationship = apps.get_model('people', 'Relationship')
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for relationship in Relationship.objects.all():
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answer_set = relationship.answer_sets.first()
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if answer_set is None:
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answer_set = relationship.answer_sets.create()
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for answer in relationship.question_answers.all():
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answer_set.question_answers.add(answer)
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def backward_migration(apps, schema_editor):
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"""
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Move data backward from answer sets onto the relationship.
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"""
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Relationship = apps.get_model('people', 'Relationship')
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for relationship in Relationship.objects.all():
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answer_set = relationship.answer_sets.last()
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try:
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for answer in answer_set.question_answers.all():
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relationship.question_answers.add(answer)
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except AttributeError:
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pass
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class Migration(migrations.Migration):
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dependencies = [
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('people', '0015_shrink_name_fields_to_255'),
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]
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operations = [
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migrations.AddField(
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model_name='relationship',
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name='created',
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field=models.DateTimeField(auto_now_add=True, default=django.utils.timezone.now),
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preserve_default=False,
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),
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migrations.AddField(
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model_name='relationship',
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name='expired',
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field=models.DateTimeField(blank=True, null=True),
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),
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migrations.CreateModel(
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name='RelationshipAnswerSet',
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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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('timestamp', models.DateTimeField(auto_now_add=True)),
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('question_answers', models.ManyToManyField(to='people.RelationshipQuestionChoice')),
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('relationship', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='answer_sets', to='people.Relationship')),
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],
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options={
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'ordering': ['timestamp'],
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},
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),
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migrations.RunPython(forward_migration, backward_migration),
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migrations.RemoveField(
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model_name='relationship',
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name='question_answers',
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),
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]
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