Django jsonfields ValidationError: [u'Enter valid JSON'] upon upgrade from 1.7 to 1.9

Question

I'm upgrading django from 1.7 to 1.9 by means of replacing packages, installed in system (Debian 8) via apt-get with packages, installed via pip.

So, I installed jsonfield package from pip instead of apt's good old python-django-jsonfield and tried running unittests.

All my jsonfields, defined as jsonfield.JSONField(), fail the tests with message:

ValidationError: [u'Enter valid JSON']

Everything worked fine before. Any ideas, what's changed?

@e4c5 Thanks for your interest. I solved the problem and added my findings about jsonfields in Django to the question. — Boris Burkov, Jun 22 '16 at 11:36
I think you should post that as an answer. You can of course accept your answer. Then it will be usefull to others. — e4c5, Jun 22 '16 at 11:40

score 5 · Accepted Answer · answered Jun 22 '16 at 11:48

With Django 1.7 I used jsonfield 0.9, but now I installed jsonfield 1 and there's a significant difference between them. Unfortunately, jsonfield 0.9 makes use of simplejson (from django.utils import simplejson as json), which is not available in Django 1.9.

As I'm using Django 1.9 anyways and there's built-in support for JSONField in django.contrib.postgres.fields, I switched to it. I solved my problems by adding null=True, blank=True to JSONField definition:

JSONField(null=True, blank=True)

Django jsonfields ValidationError: [u'Enter valid JSON'] upon upgrade from 1.7 to 1.9

1 Answers1