def forwards(self, orm):
# Adding field 'Book.fb2_file'
db.add_column('catalogue_book', 'fb2_file',
- self.gf('django.db.models.fields.files.FileField')(default=None, max_length=100, blank=True),
+ self.gf('django.db.models.fields.files.FileField')(default='', max_length=100, blank=True),
keep_default=False)