Foreign keys add magic members

Because when you add one field to a class, you clearly want to add two fields to a class, and there's no need to consider the field you never asked to add to be something other than a field.

brutaldon/models.py

@@ -29,14 +29,16 @@ class Theme(models.Model):
     def __str__(self):
         return self.name
 
-
+from django.db.models.fields.related_descriptors import ForeignKeyDeferredAttribute
 def set_fields(klass):
-    fields = {}
+    fields = []
     for n in dir(klass):
         assert n != "_fields"
         v = getattr(klass, n)
-        if isinstance(v, models.Field):
-            fields.add(n)
+        if not hasattr(v, 'field'): continue
+        if not isinstance(v.field, models.Field): continue
+        if isinstance(v, ForeignKeyDeferredAttribute): continue
+        fields.append(n)
     setattr(klass, '_fields', fields)
     return klass