use postgres json field

pandora/archive/managers.py

@@ -4,7 +4,6 @@ from django.db.models import Q, Manager
 
 from oxdjango.managers import get_operator
 from oxdjango.query import QuerySet
-from oxdjango.fields import DictField
 
 
 keymap = {
@@ -36,8 +35,7 @@ def parseCondition(condition, user):
     if isinstance(v, bool):
         key = k
     elif k == 'url':
-        key = 'info' + get_operator('=', 'istr')
-        v = DictField.dumps({'url': v})[1:-1]
+        key = 'info__url' + get_operator('=', 'istr')
     elif k == 'list':
         q = Q(id=0)
         l = v.split(":")

pandora/archive/migrations/0004_jsonfield.py

@@ -0,0 +1,22 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.9.4 on 2018-06-19 17:23
+from __future__ import unicode_literals
+
+import django.contrib.postgres.fields.jsonb
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('archive', '0003_auto_20161104_1726'),
+    ]
+
+    operations = [
+        migrations.RunSQL(
+            'ALTER TABLE "archive_file" ALTER COLUMN "info" TYPE jsonb USING "info"::text::jsonb'
+        ),
+        migrations.RunSQL(
+            'ALTER TABLE "archive_stream" ALTER COLUMN "info" TYPE jsonb USING "info"::text::jsonb'
+        ),
+    ]

pandora/archive/models.py

@@ -13,6 +13,7 @@ from django.contrib.auth.models import User
 from django.db import models
 from django.db.models.signals import pre_delete
 from django.utils.encoding import python_2_unicode_compatible
+from oxdjango.fields import JSONField
 
 from oxdjango import fields
 import ox
@@ -69,7 +70,7 @@ class File(models.Model):
     size = models.BigIntegerField(default=0)
     duration = models.FloatField(null=True)
 
-    info = fields.DictField(default={})
+    info = JSONField(default=dict, editable=False)
 
     video_codec = models.CharField(max_length=255)
     pixel_format = models.CharField(max_length=255)
@@ -687,7 +688,7 @@ class Stream(models.Model):
     source = models.ForeignKey('Stream', related_name='derivatives', default=None, null=True)
     available = models.BooleanField(default=False)
     oshash = models.CharField(max_length=16, null=True, db_index=True)
-    info = fields.DictField(default={})
+    info = JSONField(default=dict, editable=False)
     duration = models.FloatField(default=0)
     aspect_ratio = models.FloatField(default=0)