add docs

docs/source/table_config/index.rst

@@ -146,6 +146,31 @@ information.
 
 -------------------------------------------------------------------------------
 
+menu_group
+----------
+
+We can set groups of tables in the table navigation sidebar. This is useful
+when we have many tables and in this way we can organize the tables into 
+groups for better visibility:
+
+.. code-block:: python
+
+    from piccolo_admin.endpoints import TableConfig
+
+    movie_config = TableConfig(
+        Movie,
+        menu_group="Movies"
+    )
+
+    director_config = TableConfig(
+        Director,
+        menu_group="Movies"
+    )
+
+    create_admin([director_config, movie_config])
+
+-------------------------------------------------------------------------------
+
 Source
 ------
 

piccolo_admin/endpoints.py

@@ -872,17 +872,17 @@ def get_meta(self) -> MetaResponseModel:
 
     def get_table_list(self) -> JSONResponse:
         """
-        Returns a list of all apps with tables registered with the admin.
+        Returns the list of table groups registered with the admin.
         """
-        app_names: t.Dict[t.Optional[str], t.List[str]] = {}
+        group_names: t.Dict[t.Optional[str], t.List[str]] = {}
         table_config_data = {
             i.table_class._meta.tablename: i.menu_group
             for i in self.table_configs
         }
         for k, v in sorted(table_config_data.items()):
-            app_names.setdefault(v, []).append(k)
+            group_names.setdefault(v, []).append(k)
 
-        return JSONResponse(app_names)
+        return JSONResponse(group_names)
 
     ###########################################################################