export class ReadUserDto { @IsULID() @ApiProperty({ example: ’01J3Z772NCBMD9BETHBMB74HBW’, description: ‘User ULID’, }) userId: string; } } DTO’s ULID member is string class like this. @Entity(‘users’, { schema: ‘DB’ }) export class Users { @ApiProperty({ example: ’01J3Z772NCBMD9BETHBMB74HBW’, description: ‘User ULID’, }) @Column(‘binary’, { primary: true, name: ‘user_id’, length: 16 }) userId: Buffer; } But the entity’s […]