silver vessel
Hey, how can i create a user decorator? I know like the createCustomDecorator thing but how do i access the typeorm database? In services i can do ```ts
constructor(private userRepository: Repository<UserEntity>) {}
but in the decorator i cannot do that so how do i access the repository to the user?
keen rock
How/where do you want to use this decorator?
silver vessel
Controller, as like ```ts
async getXYZ(@User() user: UserEntity){
// user has the user entity out of database, in user decorator i get the userid that is in the bearer auth token and then get the user out of database
}
Why not use a pipe to hydrate the userId to be a full entity? A decorator itself can't (and shouldn't in my opinion) run async commands to modify the parameter itself. Nest has a built in way to do that already
silver vessel
could you give me an example?
keen rock
@Injectbale()
export class UserHydrationPipe implements PipeTransform<string, UserType> {
// this could be @InjectRepository(User), @InjectModel(User.name), UserService, whatever
constructor(private readonly userDbAccess: UserDbAccessor) {}
async transform(id: string, metadata: ArgumentMetadata) {
const user = await this.useDbAccess.get({ where: { id } });
return user;
}
}
Then you can use it like
@Get('some/path/')
getSomtehingWithUser(@User(UserHydrationPipe) user: UserEntity) {
return user;
}
"Hydration" is taking a single value, like an id, and returning an object based on it for further use in the route
silver vessel
oh okay good to know :)
keen rock
and can i access the request header in the pipe?
I would use the@User decorator to get id from the header, like you are now, and then Nest will pass that value to the pipe, because that's how pipes work
silver vessel
OHHH now i get it, so the @User() is my user decorator where i get the userid from the header and the hydrationpipe is where i get the user then
keen rock
Yes, it's a two step process, but everything has its place to function
silver vessel
okay that sounds good, thanks :D