2019-11-25 08:49:06 +00:00
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# -*- coding: utf-8 -*-
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from __future__ import unicode_literals
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from django.db import migrations
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def create_attachments(apps, schema_editor):
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Album = apps.get_model("music", "Album")
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Attachment = apps.get_model("common", "Attachment")
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album_attachment_mapping = {}
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def get_mimetype(path):
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if path.lower().endswith('.png'):
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return "image/png"
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return "image/jpeg"
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for album in Album.objects.filter(attachment_cover=None).exclude(cover="").exclude(cover=None):
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2019-11-27 14:56:56 +00:00
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try:
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album_attachment_mapping[album] = Attachment(
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file=album.cover,
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size=album.cover.size,
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mimetype=get_mimetype(album.cover.path),
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)
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except FileNotFoundError:
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print('Skipping missing cover file {}'.format(album.cover.path))
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2019-11-25 08:49:06 +00:00
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Attachment.objects.bulk_create(album_attachment_mapping.values(), batch_size=2000)
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# map each attachment to the corresponding album
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# and bulk save
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for album, attachment in album_attachment_mapping.items():
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album.attachment_cover = attachment
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Album.objects.bulk_update(album_attachment_mapping.keys(), fields=['attachment_cover'], batch_size=2000)
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def rewind(apps, schema_editor):
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pass
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class Migration(migrations.Migration):
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dependencies = [("music", "0042_album_attachment_cover")]
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operations = [migrations.RunPython(create_attachments, rewind)]
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