diff --git a/ox/django/api/actions.py b/ox/django/api/actions.py
index 54c5ee3..8579080 100644
--- a/ox/django/api/actions.py
+++ b/ox/django/api/actions.py
@@ -11,7 +11,7 @@ from ...utils import json
 
 def autodiscover():
     # Register api actions from all installed apps
-    from django.utils.importlib import import_module
+    from importlib import import_module
     from django.utils.module_loading import module_has_submodule
     for app in settings.INSTALLED_APPS:
         if app != 'api':
diff --git a/ox/django/api/urls.py b/ox/django/api/urls.py
index 460da84..5346a98 100644
--- a/ox/django/api/urls.py
+++ b/ox/django/api/urls.py
@@ -1,13 +1,13 @@
 # -*- coding: utf-8 -*-
 # vi:si:et:sw=4:sts=4:ts=4
 
-from django.conf.urls import patterns
+from django.conf.urls import url
 
 import views
 
 import actions
 actions.autodiscover()
 
-urlpatterns = patterns("",
-    (r'^$', views.api),
-)
+urlpatterns = [
+    url(r'^$', views.api),
+]
diff --git a/ox/django/decorators.py b/ox/django/decorators.py
index 84e5faf..98aa9dd 100644
--- a/ox/django/decorators.py
+++ b/ox/django/decorators.py
@@ -26,7 +26,7 @@ def admin_required_json(function=None):
     """
 
 	def _wrapped_view(request, *args, **kwargs):
-		if request.user.is_authenticated() and request.user.get_profile().get_level() == 'admin':
+		if request.user.is_authenticated() and request.user.profile.get_level() == 'admin':
 			return function(request, *args, **kwargs)
 		return render_to_json_response({'status': {'code': 403, 'text': 'permission denied'}})
 	return wraps(function)(_wrapped_view)
diff --git a/ox/django/fields.py b/ox/django/fields.py
index 83e11f0..9270468 100644
--- a/ox/django/fields.py
+++ b/ox/django/fields.py
@@ -2,6 +2,7 @@
 # vi:si:et:sw=4:sts=4:ts=4
 import time
 import datetime
+import copy
 
 from django.db import models
 from django.utils import datetime_safe
@@ -45,20 +46,15 @@ def from_json(json_object):
     return json_object
 
 class DictField(models.TextField):
-    """DictField is a textfield that contains JSON-serialized dictionaries."""
-
-    # Used so to_python() is called
-    __metaclass__ = models.SubfieldBase
     _type = dict
 
     def loads(self, value):
         return json.loads(value, object_hook=from_json)
 
     def dumps(self, obj):
-        return json.dumps(obj, default=to_json)
+        return json.dumps(obj, default=to_json, ensure_ascii=False)
 
-    def to_python(self, value):
-        # django 1.7
+    def from_db_value(self, value, expression, connection, context):
         if value is None:
             return value
         if isinstance(value, self._type):
@@ -71,10 +67,6 @@ class DictField(models.TextField):
             assert isinstance(value, self._type)
         return value
 
-    def from_db_value(self, value, expression, connection, context):
-        # django 1.8
-        return self.to_python(value)
-
     def get_prep_value(self, value):
         if isinstance(value, self._type):
             value = self.dumps(value)
@@ -83,9 +75,15 @@ class DictField(models.TextField):
         value = models.TextField.get_prep_value(self, value)
         return value
 
+    def get_default(self):
+        if self.has_default():
+            if callable(self.default):
+                return self.default()
+            return copy.deepcopy(self.default)
+        return super(DictField, self).get_default()
 
 class TupleField(DictField):
-    _type = tuple
+    _type = (tuple, list)
 
     def loads(self, value):
         value = DictField.loads(self, value)
diff --git a/ox/django/query.py b/ox/django/query.py
index 216f1e1..38ab9a6 100644
--- a/ox/django/query.py
+++ b/ox/django/query.py
@@ -20,31 +20,21 @@ class Model(models.Model):
     objects = Manager()
 '''
 
-class SQLCompiler(SQLCompiler):
+class NullLastSQLCompiler(SQLCompiler):
 
-    def get_ordering(self):
-        result, group_by = super(SQLCompiler, self).get_ordering()
-        if self.query.nulls_last and len(result):
-            if self.connection.vendor == 'sqlite':
-                _result = []
-                for r in result:
-                    if r.endswith(' DESC'):
-                        _r = r[:-len(' DESC')]
-                    elif r.endswith(' ASC'):
-                        _r = r[:-len(' ASC')]
-                    _result.append(_r + ' IS NULL')
-                    _result.append(r)
+    def get_order_by(self):
+            result = super(NullLastSQLCompiler, self).get_order_by()
+            if self.query.nulls_last and result \
+                and self.connection.vendor == 'postgresql':
+                return [(expr, (sql + ' NULLS LAST', params, is_ref))
+                        for (expr, (sql, params, is_ref)) in result]
+            return result
 
-                result = _result
-            else:
-                result = map(lambda e: e + ' NULLS LAST', result)
-        return result, group_by
-
-class Query(Query):
+class NullsLastQuery(Query):
     nulls_last = False
 
     def clone(self, *args, **kwargs):
-        obj = super(Query, self).clone(*args, **kwargs)
+        obj = super(NullsLastQuery, self).clone(*args, **kwargs)
         obj.nulls_last = self.nulls_last
         return obj
 
@@ -53,18 +43,13 @@ class Query(Query):
             raise ValueError("Need either using or connection")
         if using:
             connection = connections[using]
-        # Check that the compiler will be able to execute the query
-        for alias, aggregate in self.aggregate_select.items():
-            connection.ops.check_aggregate_support(aggregate)
-        
-        return SQLCompiler(self, connection, using)
-
+        return NullLastSQLCompiler(self, connection, using)
 
 class QuerySet(django.db.models.query.QuerySet):
 
     def __init__(self, model=None, query=None, using=None, **kwargs):
         super(QuerySet, self).__init__(model=model, query=query, using=None, **kwargs)
-        self.query = query or Query(self.model)
+        self.query = query or NullsLastQuery(self.model)
 
     def order_by(self, *args, **kwargs):
         nulls_last = kwargs.pop('nulls_last', False)