I tried implementing the code found at http://plnkr.co/edit/yV94ZjypwBgHAlb0RLK2?p=preview, but I am encountering errors related to push and controls.
I followed the instructions provided, but I am unsure of what is causing the issue.
import { Component } from '@angular/core';
import { ViewController,Platform } from 'ionic-angular';
import { FormBuilder,FormGroup,Validators,FormControl,FormArray } from '@angular/forms';
@Component({
selector: 'filter-vendor',
templateUrl: 'filter-vendor.html'
})
export class FilterVendorPage {
questions = [{id:1,text:'Question 1', answers:[{id:1},{id:2}]},{id:2,text:'Question 2', answers:[{id:11},{id:22}]}]
surveyForm:FormGroup;
constructor(
private viewCtrl: ViewController,
private formBuilder:FormBuilder
){
this.surveyForm=this.formBuilder.group({
question:formBuilder.array([])
})
for(var i=0;i<this.questions.length;i++){
let question=formBuilder.group({
question_id:[this.questions[i].id,Validators.required],
answer_id:formBuilder.array([])
});
this.surveyForm.controls['questions'].push(question);
}
}
onChange(id, isChecked, index) {
const answers = <FormArray>this.surveyForm.controls.questions.controls[index].controls.answer_ids
if(isChecked) {
answers.push(new FormControl(id))
} else {
let idx = answers.controls.findIndex(x => x.value == id)
answers.removeAt(idx)
}
}
}
I would appreciate any assistance in resolving this issue. Thank you in advance.