How to exclude entity field from returned by controller JSON. NestJS + Typeorm

Question

I want to exclude password field from returned JSON. I am using NestJS and Typeorm.

The solution provided on this question doesn\'t work for me or in NestJS. I can

Answer 1

You can overwrite the toJSON method of the model like this.

@Entity()
export class User extends BaseAbstractEntity implements IUser {
  static passwordMinLength: number = 7;

  @ApiModelProperty({ example: faker.internet.email() })
  @IsEmail()
  @Column({ unique: true })
  email: string;

  @IsOptional()
  @IsString()
  @MinLength(User.passwordMinLength)
  @Exclude({ toPlainOnly: true })
  @Column({ select: false })
  password: string;

  @IsOptional()
  @IsString()
  @Exclude({ toPlainOnly: true })
  @Column({ select: false })
  passwordSalt: string;

  toJSON() {
    return classToPlain(this);
  }

  validatePassword(password: string) {
    if (!this.password || !this.passwordSalt) {
      return false;
    }
    return comparedToHashed(password, this.password, this.passwordSalt);
  }
}

By using the class-transformer method of plainToClass along with the @Exclude({ toPlainOnly: true }), the password will be excluded from the JSON response, but will be available in the model instance. I like this solution because it keeps all the model configuration in the entity.