FastAPI 请求体

多个参数

混用Path、Query和请求体参数

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

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(..., title = "The ID of the item to get", ge=0, le=1000),
            q: Optional[str] = None,
            item: Optional[Item] = None
            ):
    results = {"item_id": item_id}
    if q:
        results.update({"q": q})
    if item:
        results.update({"item": item})
    return results

多个请求体参数

上例中，路径操作预期JSON请求体中的Item包含如下属性：

{
    "name": "Foo",
    "description": "The pretender",
    "price": 42.0,
    "tax": 3.2
}

但也可以声明多个请求体参数，例如item和user：

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

app = FastAPI()

class Item(BaseModel):
    name: str
    description: Optional[str] = None
    price: float
    tax: Optional[float] = None
    
class User(BaseModel):
    username :  str
    full_name : Optional[str] = None
    
@app.put("/items/{item_id}")
async def update_item(item_id: int, item: Item, user: User):
    results = {"item_id": item_id, "item": item, "user": user}
    return results

本例中，FastAPI能够识别函数中有多个请求体参数，因此，它把参数名作为请求体的键，并返回如下请求体：

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

fastapi会自动转换请求中的数据，因此item和user参数会接收指定的内容。

标签：None,请求,FastAPI,results,item,str,Optional,id
来源： https://www.cnblogs.com/litianming/p/16224287.html