NestJS class validator doesn't validate the data

Question

class validator doesn't work in nestjs application. Please help! Thanks!

DTO:

import {
  IsNotEmpty,
  IsDate,
  IsDateString,
  IsMobilePhone,
  IsISO8601,
  IsBoolean,
  IsEmail,
  MaxLength,
} from 'class-validator';

    export class UserEducationDto {
      @IsBoolean()
      degree: boolean;
    
      subjectMajor: string;
      subjectMinor: string;
      yearOfPassing: string;
      obtainedMarks: string;
      marksType: string;
      grade: string;
      institute: string;
      instituteAddress: string;
      instituteContactNo: string;
      instituteEmail: string;
      university: string;
      universityRegNo: string;
      universityRollNo: string;
      id?: string;
      education?: object;
      userId?: string;
    }

Controller:

@Post('/education')
  @ApiHeader({
    name: 'userId',
    description: 'userId',
  })
  async addEducationDetails(
    @Body() profileData: object,
    @GetUser() userId: any,
  ) {
      let profileDetails = new UserEducationDto();
    }

main.ts: I have added app.useGlobalPipes(new ValidationPipe());

It still doesn't validate and throw any message related to error.

Answer 1

You are constructing the object yourself, so there will be no validation unless you invoke it manually. The type has to be used on the input parameter of the action so the framework will construct and validate it.

So something like:

async addEducationDetails(
    @Body() profileData: UserEducationDto, // <- this
    @GetUser() userId: any,
)