diff --git a/snf-admin-app/synnefo_admin/admin/resources/projects/utils.py b/snf-admin-app/synnefo_admin/admin/resources/projects/utils.py
index 76df907414dbd673925ae6e48cee4f96d32dca16..93f35d9fb3c003115db116be054e854dd2a08621 100644
--- a/snf-admin-app/synnefo_admin/admin/resources/projects/utils.py
+++ b/snf-admin-app/synnefo_admin/admin/resources/projects/utils.py
@@ -37,9 +37,16 @@ def get_actual_owner(inst):
 def get_project_or_404(query, for_update=False):
     project_obj = Project.objects.select_for_update() if for_update\
         else Project.objects
+
+    if isinstance(query, basestring):
+        q = Q(id=int(query)) if query.isdigit() else Q(uuid=query)
+    elif isinstance(query, int) or isinstance(query, long):
+        q = Q(id=int(query))
+    else:
+        raise TypeError("Unexpected type of query")
+
     try:
-        return project_obj.get(Q(id=int(query)) if query.isdigit()
-                               else Q(uuid=query))
+        return project_obj.get(q)
     except ObjectDoesNotExist:
         raise AdminHttp404(
             "No Project was found that matches this query: %s\n" % query)
diff --git a/snf-admin-app/synnefo_admin/admin/resources/users/utils.py b/snf-admin-app/synnefo_admin/admin/resources/users/utils.py
index c96cdb73f86ba82eb513f32e17b5442ae3d8d9b8..6c6c47a0620867164917693ea354f1c1b555434d 100644
--- a/snf-admin-app/synnefo_admin/admin/resources/users/utils.py
+++ b/snf-admin-app/synnefo_admin/admin/resources/users/utils.py
@@ -42,7 +42,14 @@ def get_user_or_404(query, for_update=False):
     """
     usr_obj = AstakosUser.objects.select_for_update() if for_update\
         else AstakosUser.objects
-    q = Q(id=int(query)) if query.isdigit() else Q(uuid=query) | Q(email=query)
+
+    if isinstance(query, basestring):
+        q = Q(id=int(query)) if query.isdigit() else Q(uuid=query) | Q(email=query)
+    elif isinstance(query, int) or isinstance(query, long):
+        q = Q(id=int(query))
+    else:
+        raise TypeError("Unexpected type of query")
+
     try:
         return usr_obj.get(q)
     except ObjectDoesNotExist: