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Accepted
Ugwu Somto
Asked: 2024-11-19 16:35:52 +0800 CST

用于确认密码的 Nestjs 类验证器

  • 772

我正在使用 nestjs 开发一个更改密码端点，我希望能够验证两个密码是否匹配

类验证器库似乎没有关于如何验证 DTO 内的两个属性

我如何实现这一点

这是我当前的代码

export class CreatePasswordDTO {
  @MaxLength(6)
  @IsString()
  @Matches(/^\d{6}$/, { message: "Password must be a 6-digit number" })
  password: string;

  @MaxLength(6)
  @IsString()
  @Matches(/^\d{6}$/, { message: "Confirm Password must be a 6-digit number" })
  // I check that the password and confirmPassword are the same
  confirmPassword: string;
}
javascript

1 个回答

  1. Best Answer

    如果没有默认解决方案，您通常会想出一个自定义实现。我会创建自定义验证器来同时检查相关字段：

    import { registerDecorator, ValidationArguments, ValidationOptions } from 'class-validator';

export function Match(property: string, validationOptions?: ValidationOptions) {
  return (object: any, propertyName: string) => {
    registerDecorator({
      name: 'Match',
      target: object.constructor,
      propertyName: propertyName,
      options: validationOptions,
      constraints: [property],
      validator: {
        validate(value: any, args: ValidationArguments) {
          const [relatedPropertyName] = args.constraints;
          const relatedValue = (args.object as any)[relatedPropertyName];
          return value === relatedValue;
        },
        defaultMessage(args: ValidationArguments) {
          const [relatedPropertyName] = args.constraints;
          return `${args.property} must match ${relatedPropertyName}`;
        },
      },
    });
  };
}

    并在字段上使用您的自定义验证器confirmPassword：

    import { IsString, MaxLength, Matches } from 'class-validator';
import { Match } from './match.decorator'; // Adjust the import path as needed

export class CreatePasswordDTO {
  @MaxLength(6)
  @IsString()
  @Matches(/^\d{6}$/, { message: 'Password must be a 6-digit number' })
  password: string;

  @MaxLength(6)
  @IsString()
  @Matches(/^\d{6}$/, { message: 'Confirm Password must be a 6-digit number' })
  @Match('password', { message: 'Passwords do not match' })
  confirmPassword: string;
}
    • 2

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