Fixed MapField lookup for fields without declared lookups (MongoEngine/mongoengine#46)

2012-08-01 15:14:56 +01:00
parent f23a976bea
commit 2420b5e937
3 changed files with 15 additions and 1 deletions
--- a/mongoengine/queryset.py
+++ b/mongoengine/queryset.py
@@ -641,7 +641,7 @@ class QuerySet(object):
                from mongoengine.fields import ReferenceField, GenericReferenceField
                if isinstance(field, (ReferenceField, GenericReferenceField)):
                    raise InvalidQueryError('Cannot perform join in mongoDB: %s' % '__'.join(parts))
-                if getattr(field, 'field', None):
+                if hasattr(getattr(field, 'field', None), 'lookup_member'):
                    new_field = field.field.lookup_member(field_name)
                else:
                   # Look up subfield on the previous field