Sumit Agarwal Sumit Agarwal - 16 days ago 17
TypeScript Question

Angular 2: Accessing data from FormArray

I have prepared a from using ReactiveForms provided by angular2/forms. This form has a form array products:

this.checkoutFormGroup = this.fb.group({
selectedNominee: ['', Validators.required],
selectedBank: ['', Validators.required],
products: productFormGroupArray
});


productFormGroupArray is a array of FormGroup Objects.I fetched the controls i.e. FormArray object using this:

this.checkoutFormGroup.get('products')


I am trying to get the element in the products array at index
i
. How can this be done without looping through the array?

Edit:

I tried with at(index) method available:

this.checkoutFormGroup.get('products').at(index)


but this is generating an error as:

Property 'at' does not exist on type 'AbstractControl'.


Edit 2:
checkoutData and fund are received from server.

this.checkoutData.products.forEach(product => {
this.fundFormGroupArray.push(this.fb.group({
investmentAmount: [this.fund.minInvestment, Validators.required],
selectedSubOption: ['', Validators.required],
}))
});

Answer

Just cast that control to array

var arrayControl = this.checkoutFormGroup.get('products') as FormArray;

and all its features are there

var item = arrayControl.at(index);
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