gistfile1.pytb

Traceback (most recent call last):
  File "manage.py", line 18, in <module>
    execute_from_command_line(sys.argv)
  File "/Users/jacob/.virtualenvs/gizmag/lib/python2.7/site-packages/django/core/management/__init__.py", line 385, in execute_from_command_line
    utility.execute()
  File "/Users/jacob/.virtualenvs/gizmag/lib/python2.7/site-packages/django/core/management/__init__.py", line 377, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/Users/jacob/.virtualenvs/gizmag/lib/python2.7/site-packages/django/core/management/base.py", line 288, in run_from_argv
    self.execute(*args, **options.__dict__)
  File "/Users/jacob/.virtualenvs/gizmag/lib/python2.7/site-packages/django/core/management/base.py", line 338, in execute
    output = self.handle(*args, **options)
  File "/Users/jacob/.virtualenvs/gizmag/lib/python2.7/site-packages/django/core/management/commands/makemigrations.py", line 124, in handle
    self.write_migration_files(changes)
  File "/Users/jacob/.virtualenvs/gizmag/lib/python2.7/site-packages/django/core/management/commands/makemigrations.py", line 152, in write_migration_files
    migration_string = writer.as_string()
  File "/Users/jacob/.virtualenvs/gizmag/lib/python2.7/site-packages/django/db/migrations/writer.py", line 129, in as_string
    operation_string, operation_imports = OperationWriter(operation).serialize()
  File "/Users/jacob/.virtualenvs/gizmag/lib/python2.7/site-packages/django/db/migrations/writer.py", line 80, in serialize
    arg_string, arg_imports = MigrationWriter.serialize(item)
  File "/Users/jacob/.virtualenvs/gizmag/lib/python2.7/site-packages/django/db/migrations/writer.py", line 245, in serialize
    item_string, item_imports = cls.serialize(item)
  File "/Users/jacob/.virtualenvs/gizmag/lib/python2.7/site-packages/django/db/migrations/writer.py", line 310, in serialize
    return cls.serialize_deconstructed(path, args, kwargs)
  File "/Users/jacob/.virtualenvs/gizmag/lib/python2.7/site-packages/django/db/migrations/writer.py", line 221, in serialize_deconstructed
    arg_string, arg_imports = cls.serialize(arg)
  File "/Users/jacob/.virtualenvs/gizmag/lib/python2.7/site-packages/django/db/migrations/writer.py", line 380, in serialize
    raise ValueError("Cannot serialize: %r\nThere are some values Django cannot serialize into migration files.\nFor more, see https://docs.djangoproject.com/en/dev/topics/migrations/#migration-serializing" % value)
ValueError: Cannot serialize: <gizmag.file_storages.LazyStorage object at 0x10785c490>
There are some values Django cannot serialize into migration files.
For more, see https://docs.djangoproject.com/en/dev/topics/migrations/#migration-serializing

models.py

def get_media_upload_path(instance, filename):
    return os.path.join(instance.get_type_slug(), filename)
    

class Media(models.Model):
    file = models.FileField(storage=media_storage, upload_to=get_media_upload_path)
    ...