select distinct values from JSON using django-mysql

Question

I'm using this library and my model looks like this:

class PhoneTest(Model):
    data = JSONField()

My JSON obj looks something like this (in a real obj there are way more fields):

{ "deviceStatus": true, "officerCode": 123456, "imei": 123456789123456 }

For instance, I want to get a list of all officerCodes. How do I do that ? All I've tried so far has not worked. For example this did not:

tests = PhoneTests.objects.all()
tests.distinct('data__mOfficerCode')

It gives me the following error:

NotSupportedError: DISTINCT ON fields is not supported by this database backend

But it's because I'm using this new library, not the native django mysql backend. What are possible workarounds?

I would greatly appreciate any help.

Answer 1

您可以使用values_list方法

PhoneTests.objects.all().values_list('data__mOfficerCode').distinct()