当我使用fastapi和pydantic构建POST API时，会出现一个TypeError：类型的对象不可JSON序列化

Question

我使用FastAPi和Pydantic对POST API的请求和响应进行建模

我定义了三个类：

from pydantic import BaseModel, Field
from typing import List, Optional, Dict

class RolesSchema(BaseModel):
    roles_id: List[str]

class HRSchema(BaseModel):
    pk: int
    user_id: str
    worker_id: str
    worker_name: str
    worker_email: str
    schedulable: bool
    roles: RolesSchema
    state: dict

class CreateHR(BaseModel):
    user_id: str
    worker_id: str
    worker_name: str
    worker_email: str
    schedulable: bool
    roles: RolesSchema

以及我的API程序：

@router.post("/humanResource", response_model=HRSchema)
async def create_humanResource(create: CreateHR):
query = HumanResourceModel.insert().values(
    user_id=create.user_id, 
    worker_id=create.worker_id, 
    worker_name=create.worker_name,
    worker_email=create.worker_email,
    schedulable=create.schedulable,
    roles=create.roles
)
last_record_id = await database.execute(query)
return {"status": "Successfully Created!"}

输入数据格式为json:

{
     "user_id": "123",
     "worker_id": "010",
     "worker_name": "Amos",
     "worker_email": "Amos@mail.com",
     "schedulable": true,
     "roles": {"roles_id": ["001"]}
}

执行时，我得到了TypeError：RoleSchema类型的对象不可JSON序列化

如何使程序正常运行

Answer 1

如果有人带着错误信息来到这里

就我而言：

data = MyBaseModel(**data) 

# bad - TypeError: Object of type is not JSON serializable
json.dumps(data)

# good
data.json()

Answer 2

尝试使用roles=create.roles.dict()来创建query而不是roles=create.roles