Update examples to get names programatically (#711)

Author: Dreamsorcerer

examples/permissions.py

@@ -68,8 +68,9 @@ async def create_app() -> web.Application:
             "secure": False
         },
         "resources": (
-            {"model": SAResource(engine, Simple), "display": ("id", "num", "optional_num"),
-             "bulk_update": {"Set to 7": {"optional_num": 7}}},
+            {"model": SAResource(engine, Simple),
+             "display": (Simple.id.name, Simple.num.name, Simple.optional_num.name),
+             "bulk_update": {"Set to 7": {Simple.optional_num.name: 7}}},
             {"model": SAResource(engine, SimpleParent)}
         )
     }

examples/relationships.py

@@ -40,7 +40,7 @@ async def create_app() -> web.Application:
             "secure": False
         },
         "resources": (
-            {"model": SAResource(engine, Author), "repr": "name"},
+            {"model": SAResource(engine, Author), "repr": Author.name.name},
             {"model": SAResource(engine, Book)}
         )
     }

examples/validators.py

@@ -53,8 +53,8 @@ async def create_app() -> web.Application:
             "secure": False
         },
         "resources": ({"model": SAResource(engine, User),
-                       "validators": {"username": (("regex", r"^[A-Z][a-z]+$"),),
-                                      "email": (("email",),)}},)
+                       "validators": {User.username.name: (("regex", r"^[A-Z][a-z]+$"),),
+                                      User.email.name: (("email",),)}},)
     }
     aiohttp_admin.setup(app, schema)