Django model serializer 'only_fields' not included in the payload

[jwright0991]

I was having issues trying to get the fields that it included in the the data attribute of the subscription to populate in the payload. Curiously, I was able to get the id to show up, but I couldn't get any of the other attributes of my model to populate in the payload. After inspecting the source code and removing the modifications to the field values (stripping '' and changing to uppercase) in line 78 of subscription.py I was able to fix the problem and get the fields that I wanted in the payload. I'm assuming that there was a reason for including the change to upper and removing the '', but I just wanted to inform you that it was causing a bug for me. I really appreciate the work you have done and hope you can create a fix for this issue in the future!