Sanic通过pydantic实现数据验证和标准化输出

原创已于 2025-11-24 07:13:28 修改 · 47 阅读

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#python #linux #前端

于 2025-11-24 07:00:06 首次发布

POST /users/login 方法提供username和password入参 username要求字符长序6-20之间 ,密码要求字符长度大于8

# main.py主文件添加路由
app.blueprint(Users,url_prefix='/users')

# users.py提供登录方法
from sanic.log import logger
from sanic_ext import validate
from app.entiies.account import Account

Users=Blueprint('users',url_prefix='/')


@Users.post('/login') # username (6-20) password (8-)
@validate(json=Account)
async def login(req:Request,body:Account)->HTTPResponse:
    info=req.json
    logger.info(info)
    return json(info)

uv add sanic_ext # 加入扩展对应的是Account验证方法

pydantic验证 uv add pydantic

from pydantic import BaseModel,model_validator
from sanic.exceptions import SanicException

class Account(BaseModel):
    username:str
    password:str

    @model_validator(mode='before')
    def validators(cls,values):
        username=values.get('username')
        if len(username)<6 or len(username)>20:
            raise SanicException('用户名长度6-20',status_code=400)
        
        pwd=values.get('password')
        if len(pwd)<8:
            raise SanicException('密码长度小于8',status_code=400)
        return values

业务集成标准化输出 {$code,$message}通过middleware实现

在主路由上实现中间件注册

app.register_middleware(middleware=logging,attach_to='response')

from sanic.request import Request
from sanic.response import HTTPResponse,json
from sanic.log import logger
from sanic import text,json 
import json as json2
import uuid



async def logging(req:Request,res:HTTPResponse):
    data=json2.loads(res.body.decode('utf-8'))
    if data['status']==400:
        return json({'code':f'10{data["status"]}','message':data['message'],'req-id':str(uuid.uuid4())},status=400)