71 lines
2.2 KiB
Python
71 lines
2.2 KiB
Python
# Generated by Django 3.0.8 on 2020-10-12 15:20
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from django.db import migrations, models
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from django.utils.text import slugify
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def forwards_func(apps, schema_editor):
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SnapshotModel = apps.get_model("core", "Snapshot")
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TagModel = apps.get_model("core", "Tag")
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db_alias = schema_editor.connection.alias
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snapshots = SnapshotModel.objects.all()
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for snapshot in snapshots:
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tags = snapshot.tags
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tag_set = (
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set(tag.strip() for tag in (snapshot.tags_old or '').split(','))
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)
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tag_set.discard("")
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for tag in tag_set:
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to_add, _ = TagModel.objects.get_or_create(name=tag, defaults={'slug': slugify(tag)})
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snapshot.tags.add(to_add)
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def reverse_func(apps, schema_editor):
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SnapshotModel = apps.get_model("core", "Snapshot")
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TagModel = apps.get_model("core", "Tag")
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db_alias = schema_editor.connection.alias
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snapshots = SnapshotModel.objects.all()
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for snapshot in snapshots:
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tags = snapshot.tags.values_list("name", flat=True)
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snapshot.tags_old = ",".join([tag for tag in tags])
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snapshot.save()
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class Migration(migrations.Migration):
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dependencies = [
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('core', '0005_auto_20200728_0326'),
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]
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operations = [
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migrations.RenameField(
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model_name='snapshot',
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old_name='tags',
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new_name='tags_old',
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),
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migrations.CreateModel(
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name='Tag',
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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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('name', models.CharField(max_length=100, unique=True, verbose_name='name')),
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('slug', models.SlugField(max_length=100, unique=True, verbose_name='slug')),
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],
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options={
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'verbose_name': 'Tag',
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'verbose_name_plural': 'Tags',
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},
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),
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migrations.AddField(
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model_name='snapshot',
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name='tags',
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field=models.ManyToManyField(to='core.Tag'),
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),
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migrations.RunPython(forwards_func, reverse_func),
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migrations.RemoveField(
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model_name='snapshot',
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name='tags_old',
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),
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]
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