@@ -0,0 +1,521 @@
+# -*- coding: utf-8 -*-%0Afrom __future__ import unicode_literals%0A%0Afrom django.db import models, migrations%0A%0A%0Aclass Migration(migrations.Migration):%0A%0A    dependencies = %5B%0A        ('filer', '0001_initial'),%0A    %5D%0A%0A    operations = %5B%0A        migrations.AlterField(%0A            model_name='file',%0A            name='polymorphic_ctype',%0A            field=models.ForeignKey(related_name='polymorphic_filer.file_set+', editable=False, to='contenttypes.ContentType', null=True),%0A            preserve_default=True,%0A        ),%0A    %5D%0A

use django-polymorphic 0.7.0 in migrations