class-validator 在使用nestjs开发应用时,我们一般需要对前端提交的数据进行验证,此时就需要用到class-validator这个库了。 首先看一段实例代码: 代码语言:typescript AI代码解释 import{IsInt,Min,Length,validate}from'class-validator';classBook{@Length(10,20)title:string;@IsInt()@Min(0)rating:number;}letb...
iconUrl:string; courseListIcon:string; description:string; longDescription:string; category:string; lessonsCount: number; promo: boolean; } We are using it with NestJS backend, in order to validate the request with meanful runtime error message, we can use class-validator package. First we ne...
是指在开发过程中,使用class-validator库对类中的某个字段进行验证。class-validator是一个基于装饰器的验证库,可以用于验证类中的属性是否符合指定的规则。 具体步骤如下: 首先,需要安装class-validator库。可以通过npm或者yarn进行安装。 在需要验证的类中,引入class-validator库,并使用装饰器对需要验证的字段进行标记...
ClassValidator.js A library for Object-Oriented style validation in JavaScript/TypeScript. Creating a validator for a class // Class we want to create a validator for:classCreditCardDetails{name:string;number:number;expirationDate:Date;}// Create a validator for that class:CCValidator=newValidator...
import {MinLength, MaxLength} from "class-validator"; export class Post { @MinLength(10, { message: "Title is too short" }) @MaxLength(50, { message: "Title is too long" }) title: string; } There are few special tokens you can use in your messages: $value - the value that is ...
import{IsString,IsNotEmpty,Length}from'class-validator'exportclassUserDTO{/** 用户名 */@IsNot...
classType parameter We've introduced a new parameter calledclassType(a class type containingclass-validatordecorators) that you should provide, to enable us to perform dynamic validations. ClassValidatorFormGroup A typescript class extending angularFormGroupclass, with a minor change ofconstructorsignature...
npm install class-transformer class-validator In prior versions, these were direct dependencies, but now they are peer dependencies so you can choose when to upgrade and accept breaking changes. Its important to set these options intsconfig.jsonfile of your project: ...
import{RegExpValidatorFactory}from"ojs/ojvalidationfactory-base"; //To access this type in your code, classMyClassimplementsRegExpValidatorFactory{ //or, let myVariable:RegExpValidatorFactory; JET In Typescript A detailed description of working with JET elements and classes in your typescript proje...
Typescript Import Format //This class is not exported from module and can not be accessed in runtime.//However to enable typechecking and ducktyping, you can access it as an interface.import {ValidatorError} from "ojs/ojvalidation-error";//To access this type in your code,class MyClass ...