Include parents

evennia/contrib/base_systems/components/component.py

@@ -21,7 +21,15 @@ class BaseComponent(type):
         as a component in the Component Listing using its name.
         All of them require a unique name.
         """
-        attrs['_fields'] = {}
+        attrs_name = attrs.get('name')
+        if attrs_name and not COMPONENT_LISTING.get(attrs_name):
+            new_fields = {}
+            attrs['_fields'] = new_fields
+            for parent in parents:
+                _parent_fields = getattr(parent, "_fields")
+                if _parent_fields:
+                    new_fields.update(_parent_fields)
+
         new_type = super().__new__(cls, name, parents, attrs)
         if new_type.__base__ == object:
             return new_type