FastAPI(9)- 多个 Request Body

Path、Query、Request Body 混合使用 

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)

除了路径参数 item_id 是必传的,查询参数 name 和请求体 item 都是可选非必传

只传路径参数的请求结果

路径参数、查询参数、请求体均传递的请求结果

查看 Swagger API 文档

多个 Request Body

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 
  • 这种情况下,FastAPI 会注意到函数中有两个 Request Body,因为这 item、user 两个参数都指定了 Pydantic 模型
  • FastAPi 将使用参数名作为 Request Body 中的键(字段名称)

期望得到的 Request Body

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

  

正确传参的请求结果

查看 Swagger API 文档

原文地址:https://www.cnblogs.com/poloyy/p/15310358.html