先将传进来普通对象通过 class-transformer 包的 plainToClass 函数转化成 dto 类的实例. 将得到的这个 dto 实例通过 class-validator 包的 validate 函数进行验证,validate 函数同时会对 dto 实例进行相应处理(比如,设置了 whitelist, 会删除没有被 class-Validator 装饰器装饰的属性) 将这个 dto 实例再次通过 clas...
import { IsEmail, validate } from 'class-validator'; class User { @IsEmail() email: string; } async function validateUser(user: User) { const errors = await validate(user); if (errors.length > 0) { console.log('Validation failed. Errors: ', errors); } else { console.log('Validati...
userToBeSaved.email = ctx.request.body.email;//validateuser entityconsterrors: ValidationError[] =awaitvalidate(userToBeSaved);// errors is an array of validation errorsif(errors.length >0) {// return bad request status code and errors arrayctx.status =400; ctx.body = errors; }else{// sa...
import { validate } from 'class-validator' User user = new User() user.age = 15 user.birthYear = 2005 user.name = 'name' validate(user, groups: ["adult"]) Run Code Online (Sandbox Code Playgroud) 我想做的是根据birthYear 字段动态设置用于验证的组。ValidateIf 不是我想要使用的东西,...
既然校验数据这么麻烦,用nodejs写的服务端接口是怎么搞的呢? 查了一圈发现了一个叫class-validator的东西,是nestjs框架里的默认工具。这玩意儿能用在前端吗? 能!使用起来大概长这个样子 import{validate,ValidateNested,IsNotEmpty,Equals,Length,IsArray}from"class-validator";lethasOwnProperty=Object.prototype.has...
npm install class-validator --save Note: Please use at least npm@6 when using class-validator as from npm@6 the dependency tree is flatterned what is good for us.UsageCreate your class and put some validation decorators on the properties you want to validate:...
import{validate,IsString,MinLength,ValidateNested}from'class-validator';classMySubClass{@IsString()@MinLength(2)publicname:string;constructor(name:string){this.name=name;}}classWrapperClass{@ValidateNested({each:true})publiclist:MySubClass[];constructor(list:MySubClass[]){this.list=list;}}constsubCla...
class-validator 复杂类型校验 在使用class-validator进行参数校验的时候,会遇到[object,object]或[key:object]的情况!刚接触class-validator的小伙伴,遇到这种问题会比较头大(我刚遇到的这种情况也是很头大😂😂!)!废话不多少说,我们直接上代码: 1、数组中嵌套对象型-[object,object,...]...
import{ Type } from'class-transformer';import{ IsNumber, IsString, ValidateNested } from'class-validator';classAddress{@IsString()addressName: string;@IsNumber()addressCode: number; }classUser{@IsString()userName: string;@ValidateNested()@Type(() => Address)address: Address; ...
class-validator随笔 class-validator源码地址 通过自定义一个全局的validation pipe,结合class-validator来做参数校验。 nest官网对class-validator一笔带过。本篇整理一些常用的方法。 dto 需要自行了解dto 常用的 IsDefined 字符串类型的判断 IsNumberString 字符串"1",可以符合条件。数字1却不行。