moviewyrm/bookwyrm/migrations/0101_auto_20210929_1847.py

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# Generated by Django 3.2 on 2021-05-21 00:17
from django.db import migrations
import bookwyrm
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from bookwyrm.connectors.abstract_connector import infer_physical_format
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def infer_format(app_registry, schema_editor):
"""set the new phsyical format field based on existing format data"""
db_alias = schema_editor.connection.alias
editions = (
app_registry.get_model("bookwyrm", "Edition")
.objects.using(db_alias)
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.filter(physical_format_detail__isnull=False)
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)
for edition in editions:
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free_format = edition.physical_format_detail.lower()
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edition.physical_format = infer_physical_format(free_format)
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edition.save()
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def reverse(app_registry, schema_editor):
"""doesn't need to do anything"""
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class Migration(migrations.Migration):
dependencies = [
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("bookwyrm", "0100_shelf_description"),
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]
operations = [
migrations.RenameField(
model_name="edition",
old_name="physical_format",
new_name="physical_format_detail",
),
migrations.AddField(
model_name="edition",
name="physical_format",
field=bookwyrm.models.fields.CharField(
blank=True,
choices=[
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("AudiobookFormat", "Audiobook"),
("EBook", "eBook"),
("GraphicNovel", "Graphic novel"),
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("Hardcover", "Hardcover"),
("Paperback", "Paperback"),
],
max_length=255,
null=True,
),
),
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migrations.RunPython(infer_format, reverse),
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]