FastAPI上传POST多个对象BaseModel数据JSON，python

港控/mmm° 2024-04-07 10:54 74阅读 0赞

from typing import Optional
    
    import uvicorn
    from fastapi import FastAPI
    from pydantic import BaseModel
    
    app = FastAPI()
    
    
    class Person(BaseModel):
        name: str
        desc: Optional[str] = None
    
    
    class User(BaseModel):
        username: str
        age: Optional[int] = 0
    
    
    @app.post("/item/{item_id}")
    async def item(item_id: int, person: Person, user: User):
        results = {"item_id": item_id, "person": person, "user": user}
        return results
    
    
    if __name__ == '__main__':
        uvicorn.run(app=app, host="0.0.0.0", debug=True)

在postman里面构造多个对应的json数据对象：

![ee1ab95f18be4fb89cc1803ffced76e6.png][]

如果上传的既有JSON也有其他基本类型时候，比如一个count=10，则需要定义 Body():

from typing import Optional
    
    import uvicorn
    from fastapi import FastAPI, Body
    from pydantic import BaseModel
    
    app = FastAPI()
    
    
    class Person(BaseModel):
        name: str
        desc: Optional[str] = None
    
    
    class User(BaseModel):
        username: str
        age: Optional[int] = 0
    
    
    @app.post("/item/{item_id}")
    async def item(item_id: int, person: Person, user: User, count: int = Body()):
        results = {"item_id": item_id, "person": person, "user": user, "count": count}
        return results
    
    
    if __name__ == '__main__':
        uvicorn.run(app=app, host="0.0.0.0", debug=True)

![3818e50ee0884e30afb155da78f7def6.png][]

[ee1ab95f18be4fb89cc1803ffced76e6.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/07/a6b3bb24b9c64b5fae45fdeab2ba202d.png
[3818e50ee0884e30afb155da78f7def6.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/07/bf75839dabcc4faba7b5f22e4837094c.png