track added routes to avoid duplicates (e.g. 'message' for show, upda…

…te, and delete actions)

pyramid_routehelper/__init__.py

@@ -228,20 +228,29 @@ def swap(dct, newdct):
     collection_path = path
     new_path = path + '/new'
     member_path = path + '/:id'
+
+    added_route_names = []
 
     def add_route_and_view(self, action, route_name, path, request_method='any'):
         if request_method != 'any':
             request_method = request_method.upper()
         else:
             request_method = None
 
-        self.add_route(route_name, path, **kwargs)
+        if route_name not in added_route_names:   # Check if the route name has been added already
+            self.add_route(route_name, path, **kwargs)
+            added_route_names.append(route_name)
+
         self.add_view(view=handler, attr=action, route_name=route_name, request_method=request_method, **action_kwargs.get(action, {}).get('default', {}))
 
         for format_kwargs in action_kwargs.get(action, {}).get('formatted', []):
             format = format_kwargs.pop('format')
-            self.add_route("%s_formatted_%s" % (format, route_name),
-                           "%s.%s" % (path, format), **kwargs)
+            formatted_route_name = "%s_formatted_%s" % (format, route_name)
+
+            if formatted_route_name not in added_route_names:  # Check if the route name has been added already
+                added_route_names.append(formatted_route_name)
+                self.add_route(formatted_route_name, "%s.%s" % (path, format), **kwargs)
+
             self.add_view(view=handler, attr=format_kwargs.pop('attr'), request_method=request_method,
                           route_name = "%s_formatted_%s" % (format, route_name), **format_kwargs)