0013_auto__del_storage__del_field_source_storage__del_field_thumbnail_stora.py 文件源码

def backwards(self, orm):

        # Removing index on 'Thumbnail', fields ['storage_hash']
        db.delete_index('easy_thumbnails_thumbnail', ['storage_hash'])

        # Removing index on 'Source', fields ['storage_hash']
        db.delete_index('easy_thumbnails_source', ['storage_hash'])

        # Adding model 'Storage'
        db.create_table('easy_thumbnails_storage', (
            ('pickle', self.gf('django.db.models.fields.TextField')()),
            ('hash', self.gf('django.db.models.fields.CharField')(max_length=40, db_index=True)),
            ('id', self.gf('django.db.models.fields.AutoField')(primary_key=True)),
        ))
        db.send_create_signal('easy_thumbnails', ['Storage'])

        # Create a storage object. This may obviously not be the storage
        # object which the source / thumbnail objects actually belong to but
        # at least it lets us reverse migrate.
        storage = orm.Storage()
        storage.pickle = pickle.dumps(default_storage)
        storage.hash = hashlib.md5(storage.pickle).hexdigest()
        storage.save()

        # Adding field 'Source.storage'
        db.add_column('easy_thumbnails_source', 'storage', self.gf('django.db.models.fields.related.ForeignKey')(default=storage.pk, to=orm['easy_thumbnails.Storage']), keep_default=False)

        # Adding field 'Thumbnail.storage'
        db.add_column('easy_thumbnails_thumbnail', 'storage', self.gf('django.db.models.fields.related.ForeignKey')(default=storage.pk, to=orm['easy_thumbnails.Storage']), keep_default=False)