import { registerDecorator, ValidationOptions, ValidationArguments } from 'class-validator'; export function IsLongerThan(property: string, validationOptions?: ValidationOptions) { return function (object: Object, propertyName: string) { registerDecorator({ name: 'isLongerThan', target: object.construct...
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...
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。 注意,错误的message要这么传入 @IsNumberString({},{message:'...
@IsDateString() Alias for @IsISO8601(). @IsISO8601()的别名 @IsNumberString(options?: IsNumericOptions) Checks if a string is a number. 检查字符串是否为数字 字符串验证装饰器 修饰器描述(英文)描述(中文) @Contains(seed: string) Checks if the string contains the seed. 是否包含种子 @NotCon...
190 import {MinLength, MaxLength, ValidationArguments} from "class-validator"; 191 192 export class Post { 193 194 @MinLength(10, { 195 message: (args: ValidationArguments) => { 196 if (args.value.length === 1) { 197 return "Too short, minimum length is 1 character"; 198...
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:$value - the value that ...
我正在使用一个class-validator包来验证GraphQL输入类型中的链接。问题是,当链接在输入字符串的末尾包含空格时,验证会失败。有没有办法在验证前对其进行修剪?import { InputType, Field, Int } from 'type-graphql'; import { IsUrl, IsOptional } from 'class-validator ...
Checks if a string is a boolean (e.g. is “true” or “false”).是否为布尔值（例如“true”或“false”）@IsDateString()Alias for @IsISO8601().@IsISO8601（）的别名 @IsNumberString(options?: IsNumericOptions)Checks if a string is a number.检查字符串是否为数字 字符串验证装饰器 修饰器...
import { MinLength, MaxLength } from 'class-validator'; export class Post { @MinLength(10, { message: 'Title is too short', }) @MaxLength(50, { message: 'Title is too long', }) title: string; }There are few special tokens you can use in your messages:$value - the value that ...
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. Usage Create your class and put some validation decorators on the properties you want to validate: import {validate, Contains...