Nest.js unique dto validator-CodePudding

Maybe someone know how to make custom unique validator with class-validator in nest.js.I found few articles in internet, but however those implementations was not reusable. I wanna my unique validator reuse in every dto for example: users, products.

CodePudding user response：

You can use this small lib to reach your goal or get inspired by it's code dbvalidator,

to use it, you only need to, install it npm install @youba/nestjs-dbvalidator

2/ register it :

 @Module({
  imports: [DbValidatorsModule.register({
    type: 'mysql',
    host:  "localhost",
    port: 3306,
    username:"root",
    password:"password",
    database:"demo"})],
  providers: [StreetService],
  controllers: [StreetController],
})
export class StreetModule {
  constructor() {}
}

3/ use it in DTO :

@IsNotEmpty()
@Validate(IsUnique, 
[ { table: "company", column: "name" }] )

name: string;

ps:I'm the author in case you need any explanation