Can I use one line initialization of a blank address and have validation - angular2-forms

Question

I recently started working with Angular 2 and reactive forms. What I'm trying to accomplish is simple: create an array inside a form and let user push new objects into it (say list of user addresses to which user can add new addresses - standard FormArray). That's quite simple (and it's all described well in the documentation) but I'd like to be able to automatically validate user's input as well. I know I can do this by simply pushing a group like this:
this.formBuilder.group({
country: ['', Validators.required],
city: ['', Validators.required],
...
})
but I've got a model that represents an address instance and I would like to use it like that:
this.formBuilder.group(new Address())
that's actually how I do it right now (without validation).
My question is: can I use this one line initialization of a blank address and somehow have the validation without explicitly defining my validators every time I push new blank address?
If my question isn't clear enough, I'll answer all of your questions.

Answer 1

This could be an option for you:
this.formBuilder.group(new Address(),
{validator: (fg: FormGroup) => this.attachValidators(fg)})
Basically setting a custom validator, which goes through the individual controls of the address collection and sets their individual validators property as desired. See below:
//helper method
private attachValidators(address: FormGroup)/*: ValidationErrors */ {
for (let ctrlName of Object.keys(address.controls)) {
address.get(ctrlName).setValidators(Validators.required);
}
}
May be too much, if you consider the repetitive assignment of validators