Typescript custom type with properties of another

Question

I want to create a custom type or an interface in typescript which depends on the keys of another interface.

Initial Interface :

interface IModelCollection
{
  Account: typeof Account;
  Session: typeof Session;
  ...
}

I want to create another type which will be :

interface ISchemaCollection
{
  Account: ReturnModelType<typeof Account>;
  Session: ReturnModelType<typeof Session>;
  ...
}

I've tried the following but I get an error Type 'T[Key]' does not satisfy the constraint 'AnyParamConstructor<any>.

type TSschemaCollection<T extends object> =
{
  [Key in keyof T]: ReturnModelType<T[Key]>;
}

Answer 1

Try this out.

type ReturnModelType<T> = any; // Define ReturnModelType based on your requirements

interface ISchemaCollection {
  Account: typeof Account;
  Session: typeof Session;
  // ...
}

type TSschemaCollection<T extends ISchemaCollection> = {
  [Key in keyof T]: ReturnModelType<T[Key]>;
};

Edit Update your models and see if this helps.

public get Models(): { [Key in keyof T]: ReturnModelType<T[Key]> } {
  const models = this._models as { [Key in keyof T]?: ReturnModelType<T[Key]> };

  return Object.fromEntries(
    Object.entries(models).map(([key, model]) => [
      key as keyof T,
      getModelForClass(model as any)
    ])
  );
}