[3.1.x] Refs #12990 -- Added example to JSONField release notes.

Backport of 5d4b9c1cab03f0d057f0c7751862df0302c65cf9 from master

1 files changed, 19 insertions, 2 deletions

diff --git a/docs/releases/3.1.txt b/docs/releases/3.1.txt
index af7ec6fe5a..50eba75170 100644
--- a/docs/releases/3.1.txt
+++ b/docs/releases/3.1.txt
@@ -70,8 +70,25 @@ JSONField for all supported database backends
 Django now includes :class:`.models.JSONField` and
 :class:`forms.JSONField <django.forms.JSONField>` that can be used on all
 supported database backends. Both fields support the use of custom JSON
-encoders and decoders. The model field supports the introspection, lookups, and
-transforms that were previously PostgreSQL-only.
+encoders and decoders. The model field supports the introspection,
+:ref:`lookups, and transforms <querying-jsonfield>` that were previously
+PostgreSQL-only::
+
+    from django.db import models
+
+    class ContactInfo(models.Model):
+        data = models.JSONField()
+
+    ContactInfo.objects.create(data={
+        'name': 'John',
+        'cities': ['London', 'Cambridge'],
+        'pets': {'dogs': ['Rufus', 'Meg']},
+    })
+    ContactInfo.objects.filter(
+        data__name='John',
+        data__pets__has_key='dogs',
+        data__cities__contains='London',
+    ).delete()
 
 If your project uses ``django.contrib.postgres.fields.JSONField``, plus the
 related form field and transforms, you should adjust to use the new fields,