Question

I have a custom field with to_python and get_db_prep_value methods as defined below:

  def to_python(self, value):
    if not value:
      return None
    if isinstance(value, oauth2client.client.Credentials):
      return value
    return pickle.loads(base64.b64decode(value))

  def get_db_prep_value(self, value, connection, prepared=False):
    return base64.b64encode(pickle.dumps(value))

When I use dumpdata to dump this field, the values appear as:

"<oauth2client.client.OAuth2Credentials object at XXXXXXXX"

What should I do with the custom field in order to dump it and load it correctly?

Answer 1

Define a value_to_string method for the field. Relevent django docs.