Django 1.9 - JSONField in Models

Question

I\'m trying to set up a models file in Django 1.9 using the new JSONField. I have found examples using postgres but none with MySql. In the examples with postgres they do

Answer 1

I know this question is about Django 1.9, but JSONField can now be used with all supported database backends with the release of Django 3.1.

Answer 2

# Install jsonfield package
pip install jsonfield

# Define my model
from django.db import models
import jsonfield

class MyModel(models.Model):
    the_json = jsonfield.JSONField()

More detail:https://pypi.python.org/pypi/django-jsonfield

Answer 3

UPDATE: Django 3.1 now supports JSONField natively for multiple databases: https://docs.djangoproject.com/en/dev/releases/3.1/#jsonfield-for-all-supported-database-backends

---

As stated in other answers, Django's native JSONField (as of 1.9 and 1.10) is for PostgreSQL.

Luckily, MySQL 5.7.8+ comes with a native JSON datatype. You can add it your Django project with the django-mysql package and Django 1.8+

pip install django-mysql

from django.db import models
from django_mysql.models import JSONField

class MyModel(models.Model):
    my_json_field = JSONField()

Read more about the django_mysql JSONField here.

Answer 4

Try to save data of this model in postgres db on my local machine:

models.py:

from django.db import models
from django import forms
 
from inputData.models import Input
 
from django.contrib.postgres.fields import JSONField
 
class Results(models.Model):
 
    generator = models.OneToOneField(Input, on_delete = models.CASCADE, primary_key = True)
 
    pvalues = JSONField()

views.py

def result(req, res_id):
    try:
        inp = Input.objects.get(pk = res_id)
        path = os.path.join(BASE_DIR, 'uploads\\' + str(res_id) + '\\t.txt')
        p_values = parse_res.main(path) 
        res = Results(generator = inp, pvalues = p_values)
        res.save(using = 'results')
    except Results.DoesNotExist:
        raise Http404
    return render(req, 'result.html', {'res': res})

settings.py

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.sqlite3',
        'NAME': os.path.join(BASE_DIR, 'db.sqlite3'),
    },
    'results': {
        'ENGINE':'django.db.backends.postgresql',
        'NAME': 'results',
        'PASSWORD': 'password',
        'USER': 'user',
        'HOST': '127.0.0.1',
        'PORT': '8000'

    }
    
}

Model Results (see models.py) uses JSONField, which have about 200 bytes of data But at the line res.save(... of code views.py browser does response too long.

Whatäs wrong with JSON? What problems can be on server besides cache?

Answer 5

Django JSONField is Postgres only.

https://docs.djangoproject.com/en/3.0/ref/contrib/postgres/fields/#django.contrib.postgres.fields.JSONField

UPDATE:

There is support for MYSQL via 3rd party library django-mysql

Answer 6

For today I'd recommend using jsonfield2 or waiting for native JSON support for all database backends in Django 3.