How to get inferred types for nested form group

[Will-at-FreedomDev]

Describe the problem statement?

How to get the correct typing information when I have a nested form group?

In the following example, I have to implement the following workaround in order to get the "correct" type for the orderLine form group.

formGroup = inject(RxFormBuilder).formGroup(RefundOrderLineModel) as IFormGroup<RefundOrderLineModel>;

// hack: need to use as any as IFormGroup<OrderLineModel> to get correct typing information
get orderLineFormGroup() {
 return this.formGroup.controls.orderLine as any as IFormGroup<OrderLineModel>;
}

class RefundOrderLineModel {
  @propObject(OrderLineModel)
  orderLine = new OrderLineModel();
}

class OrderLineModel {
  @prop()
  quantity= 0;
}

This is no good.

This doesn't compile.

The expected solution you would like

I'd like the compiler to see this.formGroup.controls.orderLine as an IFormGroup<OrderLineModel>, or at least be able to cast to it without as any. Ideally, types would be inferred without any as keywords. Or an alternative solution which has correct inferred types.

Url

n/a

Package version

"@rxweb/reactive-form-validators": "^13.0.1",
"@rxweb/types": "^1.0.8",