Use DiscordModelsMeta class. Set ROUTE as required class attribute for bases. Add fetch_from_api classmethod which is shorthand to return the current model

flask_discord/models/base.py

@@ -1,8 +1,22 @@
 from flask import current_app
-from abc import ABC
+from abc import ABCMeta, abstractmethod
 
 
-class DiscordModelsBase(ABC):
+class DiscordModelsMeta(ABCMeta):
+
+    ROUTE = str()
+
+    def __init__(cls, name, *args, **kwargs):
+        if not cls.ROUTE and name != "DiscordModelsBase":
+            raise NotImplementedError(f"ROUTE must be specified in a Discord model: {name}.")
+        super().__init__(name, *args, **kwargs)
+
+
+class DiscordModelsBase(metaclass=DiscordModelsMeta):
+
+    @abstractmethod
+    def __init__(self, payload):
+        self._payload = payload
 
     @staticmethod
     def _request(*args, **kwargs):
@@ -12,6 +26,11 @@ class DiscordModelsBase(ABC):
         """
         return current_app.discord.request(*args, **kwargs)
 
+    @classmethod
+    def fetch_from_api(cls):
+        """A class method which returns instance of this model by implicitly making an API call to Discord."""
+        return cls(cls._request(cls.ROUTE))
+
     def to_json(self):
         """A utility method which returns raw payload object as it was received from discord.