first chapter

models/character.py

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+from __future__ import annotations
+
+from pydantic import BaseModel
+
+from models.address import Address
+from models.user import User, UserFieldValidator
+
+
+class CharacterModel(BaseModel):
+    role: str
+    user: User
+    address: Address
+
+class CharacterModelOptionalAddress(BaseModel):
+    role: str
+    user: UserFieldValidator
+    address: Address | None = None
+