From GIST

base.py

@@ -1,57 +0,0 @@
-from django.db.backends.postgresql_psycopg2.base import *
-from django.db.backends.postgresql_psycopg2.base import DatabaseFeatures as PostgresqlDatabaseFeatures
-from django.db.backends.postgresql_psycopg2.base import DatabaseOperations as PostgresqlDatabaseOperations
-from django.db.backends.postgresql_psycopg2.base import DatabaseWrapper as PostgresqlDatabaseWrapper       
-            
-class DatabaseFeatures(PostgresqlDatabaseFeatures):
-    uses_custom_query_class = True                                                                         
-
-class DatabaseOperations(PostgresqlDatabaseOperations):                                                    
-    def field_cast_sql(self, db_type):
-        return '%s'
-
-    def query_class(self, DefaultQueryClass):
-        from django.db.models.sql.where import WhereNode
-        from django.db.models.sql.constants import QUERY_TERMS
-
-        INET_TERMS = {}
-        INET_TERMS['inet_lt'] = '<'
-        INET_TERMS['inet_lte'] = '<='
-        INET_TERMS['inet_exact'] = '='
-        INET_TERMS['inet_gte'] = '>='
-        INET_TERMS['inet_gt'] = '>'
-        INET_TERMS['inet_not'] = '<>'
-        INET_TERMS['inet_is_contained'] = '<<'
-        INET_TERMS['inet_is_contained_or_equal'] = '<<='
-        INET_TERMS['inet_contains'] = '>>'
-        INET_TERMS['inet_contains'] = '>>='
-
-        ALL_TERMS = QUERY_TERMS.copy()
-        ALL_TERMS.update(INET_TERMS)
-
-        class InetAwareWhereNode(WhereNode):
-            def make_atom(self, child, qn):
-                table_alias, name, db_type, lookup_type, value_annot, params = child
-
-                if db_type != 'inet':
-                    return super(InetAwareWhereNode, self).make_atom(child, qn)
-
-                if lookup_type in INET_TERMS:
-                    return ('%s.%s %s inet %%s' % (table_alias, name, INET_TERMS[lookup_type]), params)
-
-                return super(InetAwareWhereNode, self).make_atom(child, qn)
-
-        class InetAwareQueryClass(DefaultQueryClass):
-            query_terms = ALL_TERMS
-
-            def __init__(self, model, connection, where=InetAwareWhereNode):
-                super(InetAwareQueryClass, self).__init__(model, connection, where)
-
-        return InetAwareQueryClass
-
-class DatabaseWrapper(PostgresqlDatabaseWrapper):
-    def __init__(self, *args, **kwargs):
-        super(DatabaseWrapper, self).__init__(*args, **kwargs)
-
-        self.features = DatabaseFeatures()
-        self.ops = DatabaseOperations()

fields.py

@@ -1,7 +0,0 @@
-from django.db import models                                                  
-                                                                                                           
-class IPAddressField(models.IPAddressField):                                                               
-    def get_db_prep_lookup(self, lookup_type, value):                                                      
-        if lookup_type.startswith('inet_'):                                                                
-            return [value]                                                    
-        return super(IPAddressField, self).get_db_prep_lookup(lookup_type, value) 

manager.py

@@ -36,6 +36,8 @@ class NetWhere(sql.where.WhereNode):
         return super(NetWhere, self).make_atom(child, qn)
 
 class NetManger(models.Manager):
+    use_for_related_fields = True
+
     def get_query_set(self):
         q = NetQuery(self.model, connection, NetWhere)
         return query.QuerySet(self.model, q)