Javascript 如何从NestJS中的类验证器返回自定义响应
是否可以从NestJs内部的类验证器返回自定义错误响应 NestJS当前返回如下错误消息:Javascript 如何从NestJS中的类验证器返回自定义响应,javascript,typescript,nestjs,class-validator,Javascript,Typescript,Nestjs,Class Validator,是否可以从NestJs内部的类验证器返回自定义错误响应 NestJS当前返回如下错误消息: { "statusCode": 400, "error": "Bad Request", "message": [ { "target": {}, "property": "username", "children": [], "constraints": {
{
"statusCode": 400,
"error": "Bad Request",
"message": [
{
"target": {},
"property": "username",
"children": [],
"constraints": {
"maxLength": "username must be shorter than or equal to 20 characters",
"minLength": "username must be longer than or equal to 4 characters",
"isString": "username must be a string"
}
},
]
}
但是,使用我的API的服务需要更类似于:
{
"status": 400,
"message": "Bad Request",
"success": false,
"meta": {
"details": {
"maxLength": "username must be shorter than or equal to 20 characters",
"minLength": "username must be longer than or equal to 4 characters",
"isString": "username must be a string"
}
}
}
Nestjs具有名为异常过滤器的内置组件,如果您想在异常情况下修饰您的响应。你可以找到相关的文件 下面的代码片段可能有助于编写自己的过滤器
<!-- language: lang-typescript -->
import { ExceptionFilter, Catch, ArgumentsHost, BadRequestException } from '@nestjs/common';
import { Request, Response } from 'express';
@Catch(BadRequestException)
export class BadRequestExceptionFilter implements ExceptionFilter {
catch(exception: BadRequestException, host: ArgumentsHost) {
const ctx = host.switchToHttp();
const response = ctx.getResponse<Response>();
const request = ctx.getRequest<Request>();
const status = exception.getStatus();
response
.status(status)
// you can manipulate the response here
.json({
statusCode: status,
timestamp: new Date().toISOString(),
path: request.url,
});
}
}
从'@nestjs/common'导入{ExceptionFilter,Catch,ArgumentsHost,BadRequestException};
从“express”导入{Request,Response};
@捕获(BadRequestException)
导出类BadRequestExceptionFilter实现ExceptionFilter{
捕获(异常:BadRequestException,主机:ArgumentsHost){
const ctx=host.switchToHttp();
const response=ctx.getResponse();
const request=ctx.getRequest();
const status=exception.getStatus();
响应
.地位(地位)
//您可以在这里操纵响应
.json({
状态代码:状态,
时间戳:新日期().toISOString(),
路径:request.url,
});
}
}