Added set_extension method to View class

Author: Joel Collins

src/labthings/extensions.py

@@ -110,7 +110,7 @@ def add_view(self, view_class, *urls, endpoint=None, **kwargs):
             self._rules[url] = self._views[endpoint]
 
         # Store this extension name as the View owner
-        view_class._parent_extension_name = self.name
+        view_class.set_extension(self.name)
 
     def on_register(self, function, args=None, kwargs=None):
         """

src/labthings/views/__init__.py

@@ -61,6 +61,10 @@ def extension(self):
             return find_extension(self._parent_extension_name)
         return None
 
+    @classmethod
+    def set_extension(cls, extension_name: str):
+        cls._parent_extension_name = extension_name
+
     @classmethod
     def get_tags(cls):
         """ """