app/auth/ is now an independent package, import nothing from app/

app/auth/__init__.py

@@ -1,6 +1,5 @@
 import os
 from fastapi import APIRouter, Depends, HTTPException, Request
-from app.utils.format import get_image_url
 
 from .deps import get_current_user
 from .jwt import create_jwt_token, create_refresh_token, verify_access_token, decode_token
@@ -12,24 +11,24 @@ router = APIRouter(tags=["Authentication"])
 # 挂载第三方 OAuth 的路由器
 router.include_router(oauth_router)
 
-@router.get("/me")
-def me(user_id = Depends(get_current_user)):
-    # 注意：根据上一轮修改，get_current_user 现在直接返回 user_id
-    from app.db import SessionLocal
-    from app.models import User
+# 定义一个动态获取当前完整用户对象的依赖项
+# 这样 auth 包不需要知道 User 模型长什么样
+# 也不需要知道 SessionLocal 是什么
+# 全部由外部动态提供
+def get_user_by_id(user_id: str = Depends(get_current_user)):
+    """
+    这是一个占位/契约函数。
+    我们在 main.py 中可以通过 app.dependency_overrides 或者直接在使用时，
+    把具体的数据库查询逻辑绑定到这里。
+    """
+    raise NotImplementedError("Please override or inject the implementation of this function in the external `main.py` file.")
 
-    db = SessionLocal()
-    try:
-        user = db.query(User).filter(User.id == user_id).first()
-        if not user:
-            raise HTTPException(status_code=404, detail="User not found")
-        return {
-            "email": user.email,
-            "name": user.name,
-            "avatar": get_image_url(user.avatar),
-        }
-    finally:
-        db.close()
+@router.get("/me")
+def me(current_user = Depends(get_user_by_id)):
+    """
+    current_user 是由外部解析并传进来的完整用户对象（或者是字典）
+    """
+    return current_user
     
 @router.post("/refresh")
 def refresh_token(refresh_token: str):
@@ -48,6 +47,7 @@ def logout():
 __all__ = [
     "router",
     "get_current_user",
+    "get_user_by_id",
     "create_jwt_token",
     "create_refresh_token",
     "verify_access_token",

app/main.py

@@ -1,10 +1,11 @@
-from fastapi import FastAPI
+from fastapi import FastAPI, Depends, HTTPException
 from strawberry import Schema
 from strawberry.fastapi import GraphQLRouter
 
-from app.auth import router as auth_router
-from app.db import engine
-from app.models import Base
+from app.auth import router as auth_router, get_user_by_id, get_current_user
+from app.db import engine, SessionLocal
+from app.models import Base, User
+from app.utils.format import get_image_url
 
 # 导入 GraphQL 组件
 from app.graphql.queries import Query
@@ -27,6 +28,22 @@ graphql_router = GraphQLRouter(schema, context_getter=get_context)
 app.include_router(auth_router)                         # 保留现有的 auth 路由供 Google OAuth 回调使用
 app.include_router(graphql_router, prefix="/graphql")   # 挂载 GraphQL 终点，前端以后只需要请求 /graphql
 
+def override_get_user_by_id(user_id: str = Depends(get_current_user)):
+    db = SessionLocal()
+    try:
+        user = db.query(User).filter(User.id == user_id).first()
+        if not user:
+            raise HTTPException(status_code=404, detail="User not found")
+        return {
+            "email": user.email,
+            "name": user.name,
+            "avatar": get_image_url(user.avatar),
+        }
+    finally:
+        db.close()
+        
+app.dependency_overrides[get_user_by_id] = override_get_user_by_id
+
 # test code
 for route in app.routes:
     methods = getattr(route, "methods", "N/A")