from fastapi import FastAPI, Path, Query
from typing import Optional
from pydantic import BaseModel
import uvicorn

app = FastAPI()


class Item(BaseModel):
    name: str
    description: Optional[str] = None
    price: float
    tax: Optional[float] = None


@app.put("/items/{item_id}")
async def update_item(
        *,
        item_id: int = Path(default=..., description="item_id", gt=1, lt=20, example=2),
        name: Optional[str] = Query(default=None, description="查询参数", min_length=0, max_length=20, example="示例值"),
        item: Optional[Item] = None
):
    results = {"item_id": item_id}
    if name:
        results.update({"name": name})
    if item:
        results.update({"item": item})
    return results


if __name__ == "__main__":
    uvicorn.run(app="7_multiple_parameters:app", host="127.0.0.1", port=8080, reload=True, debug=True)

from typing import Optional
from fastapi import FastAPI
from pydantic import BaseModel

app = FastAPI()

# 自定义模型类 1
class Item(BaseModel):
    name: str
    description: Optional[str] = None
    price: float
    tax: Optional[float] = None


# 自定义模型类 2
class User(BaseModel):
    username: str
    full_name: Optional[str] = None


@app.put("/items/{item_id}")
async def update_item(item_id: int,
                      item: Item,  # 指定第一个 Model 类型
                      user: User):  # 指定第二个 Model 类型
    results = {
        "item_id": item_id,
        "item": item,
        "user": user
    }
    return results 

{
    "item": {
        "name": "Foo",
        "description": "The pretender",
        "price": 42.0,
        "tax": 3.2
    },
    "user": {
        "username": "dave",
        "full_name": "Dave Grohl"
    }
}