# Dependency
def get_db():
    db = SessionLocal()
    try:
        yield db
    finally:
        db.close()


@app.post("/users/", response_model=schemas.User)
def create_user(user: schemas.UserCreate, db: Session = Depends(get_db)):
    db_user = crud.get_user_by_email(db, email=user.email)
    if db_user:
        raise HTTPException(status_code=400, detail="Email already registered")

    return response


# Dependency
def get_db(request: Request):
    return request.state.db


@app.post("/users/", response_model=schemas.User)
def create_user(user: schemas.UserCreate, db: Session = Depends(get_db)):
    db_user = crud.get_user_by_email(db, email=user.email)
    if db_user:
        raise HTTPException(status_code=400, detail="Email already registered")

        yield
    finally:
        if not database.db.is_closed():
            database.db.close()


@app.post("/users/", response_model=schemas.User, dependencies=[Depends(get_db)])
def create_user(user: schemas.UserCreate):
    db_user = crud.get_user_by_email(email=user.email)
    if db_user:
        raise HTTPException(status_code=400, detail="Email already registered")
    return crud.create_user(user=user)

    👉 🔜 ℹ 👥 ❎ 😨 ⏪ ⚙️ 👯‍♂️.

### ✍ ▶️ Pydantic *🏷* / 🔗

✍ `ItemBase` & `UserBase` Pydantic *🏷* (⚖️ ➡️ 💬 "🔗") ✔️ ⚠ 🔢 ⏪ 🏗 ⚖️ 👂 📊.

& ✍ `ItemCreate` & `UserCreate` 👈 😖 ⚪️➡️ 👫 (👫 🔜 ✔️ 🎏 🔢), ➕ 🙆 🌖 📊 (🔢) 💪 🏗.

, 👩‍💻 🔜 ✔️ `password` 🕐❔ 🏗 ⚫️.

✋️ 💂‍♂, `password` 🏆 🚫 🎏 Pydantic *🏷*, 🖼, ⚫️ 🏆 🚫 📨 ⚪️➡️ 🛠️ 🕐❔ 👂 👩‍💻.

=== "🐍 3️⃣.6️⃣ & 🔛"

### Create initial Pydantic *models* / schemas

Create an `ItemBase` and `UserBase` Pydantic *models* (or let's say "schemas") to have common attributes while creating or reading data.

And create an `ItemCreate` and `UserCreate` that inherit from them (so they will have the same attributes), plus any additional data (attributes) needed for creation.

So, the user will also have a `password` when creating it.

    这些 Pydantic 模型或多或少地定义了一个“schema”（一个有效的数据形状）。

    因此，这将帮助我们在使用两者时避免混淆。

### 创建初始 Pydantic*模型*/模式

创建一个`ItemBase`和`UserBase`Pydantic*模型*（或者我们说“schema”），他们拥有创建或读取数据时具有的共同属性。

然后创建一个继承自他们的`ItemCreate`和`UserCreate`，并添加创建时所需的其他数据（或属性）。

因此在创建时也应当有一个`password`属性。

但是为了安全起见，`password`不会出现在其他同类 Pydantic*模型*中，例如通过API读取一个用户数据时，它不应当包含在内。

=== "Python 3.10+"

    ```Python hl_lines="1  4-6  9-10  21-22  25-26"