Are you able to use a separate ORM layer if you wish?

[miloofcroton]

You define the DB and GraphQL types in one TypeGraphQL model. Is there a way to opt out of this, using a custom ORM solution, without totally messing up your resolver types (derived from the DB/GraphQL types normally).

[Superd22]

Absolutely. You don't have to "opt-out" of anything.
Just declare your ORM class separately.

@ObjectType()
class FooGraphql {

  @Field(() => ID)
  public id!: string

  @Field(() => String)
  public name!: string

}

@DBEntity()
class FooDb // use whatever flavour of ORM you want here


@Resolver(() => FooGraphql)
class FooResolver {

  @Query(() => FooGraphql)  
  getFoo() {
     const foodb = this.myOrm.findOne()

     // you'll probably want to abstract this through any kind of DTO implementation you wish
     const gqlFoo = new FooGraphql()
     gqlFoo.id = foodb.id
     gqlFoo.name = foodb.name

    return gql
  }
}