patch Value in a nested form control using angular2

Question

I need to set a value in a nested control in a FormBuiler and the model is the following:

this.addAccForm = this.fb.group({
      accid: ['', Validators.required],
      status: '',
      cyc: this.fb.array([
        this.initCyc(),
      ])
    })

initCyc() {
      return this.fb.group({
        cycid: ['', Validators.required],
        name: ['', Validators.required],
        description: ['', Validators.required],
        status: ['', Validators.required],
        det: this.fb.group({
            dcycid: ['', Validators.required],
            status: ['', Validators.required]
        })
      })

I need to set a value cycid and also dcycid but I m stuck to it, I've tried to use the following line , but it does NOT help :

this.addAccForm.patchValue({cyc: { [0]: {cycid: 1234567 }}});

//

this.addAccForm.patchValue({cyc: { [0]: { det : {dcycid: 9876543}}}});

Any idea how it should be?

score 6 · Answer 1 · answered Jun 02 '17 at 07:11

6

Try with theese codes

this.addAccForm.patchValue({cyc: {cycid: 1234567 }});

this.addAccForm.patchValue({cyc: { det : {dcycid: 9876543}}});

Another solution is:

(< FormGroup >this.addAccForm.controls['cyc']).controls['cycid'].patchValue('1234567');
(< FormGroup >this.addAccForm.controls['cyc']).controls['det'].controls['dcycid'].patchValue('1234567');

answered Jun 02 '17 at 07:11

sainu

2,491
2
19
35

just give a try without any success. – K Oul Jun 02 '17 at 07:38

score 6 · Answer 2 · answered Nov 27 '17 at 16:03

6

This did the trick for me:

this.addAccForm.patchValue({'cyc': {cycid: 1234567 }});

answered Nov 27 '17 at 16:03

Alexandre

85
2
5

score 3 · Answer 3 · answered Jan 12 '20 at 06:41

Update

Updating nested fields of an Angular FormGroup looks cleaner using the get method, like this:

this.addAccForm.get('cyc.det.dcycid').patchValue(9876543);

And if for some reason you like the object syntax:

this.addAccForm.get('cyc.det').patchValue({ dcycid: 9876543 });

score 2 · Answer 4 · answered Jun 28 '18 at 13:52

2

Here is the code for working for me.

I am using Angular Version "^6.0.0"

var formArray = this.addAccForm.get("cyc") as FormArray;
formArray.at(0)["controls"]["cycid"].patchValue("Value that you want to pass");

answered Jun 28 '18 at 13:52

Ashish Kadam

1,193
2
10
18

score 1 · Accepted Answer · answered Jun 10 '17 at 04:51

1

Here is how I solved my issue :

(this.addAccForm.controls['cyc'].at(0)).patchValue({cycid: 12345 });  
//
(this.addAccForm.controls['cyc'].at(0)).controls['det'].at(0).patchValue({dcycid: 9876543});

Thank you

answered Jun 10 '17 at 04:51

K Oul

225
1
5
11

that's code not work for me, I think version difference, I am using version `^6.0.0` – Ashish Kadam Jun 28 '18 at 13:54

score 1 · Answer 6 · answered Mar 16 '18 at 14:30

Clearly, this is an older entry, but that's how I handle similar situations

this.addAccForm.controls['cyc']['controls'][index].patchValue({cycid: '100'})

The syntax seems cleaner to me like this. However, one fairly easy approach to go through is by simply outputting the form.controls at first. That way you can see in the console what your form consists of and basically just observe its structure.

score 0 · Answer 7 · answered Dec 03 '18 at 17:41

Define a FormGroup to hold a form.
addAccForm: FormGroup

Create a form using FormBuilder.

this.addAccForm = this.fb.group({
    accid: ['', Validators.required],
    status: '',
    cyc: this.fb.array([])
})

Now create a method to patch the form values. You may pass the model as parameters to the method. Or a variable defined in the component class.

// GETER TO RETRIEVE THE CYC FORMARRAY
get cycFormArray(): FormArray {
    return this.addAccForm.get('cyc') as FormArray;
}

patchForm(model: any) {
   this.addAccForm.patchValue({
       accid: [model.accid, Validators.required],
       status: model.status,
   });

   // PASS ARRAY TO PATCH FORM ARRAY
   this.patchCyc(model.cyc);
}

// METHOD TO PATCH FORM ARRAY 
patchCyc(cycArray: any[]) {
    cycArray.forEach(item => {
        this.cycFormArray.push({
            this.fb.group({
               prop1: item.prop1,
               prop2: item.prop2,
               ...
            })
        })
    })
}

The patchCyc() method will loop through the array passed as parameter. A new FormGroup will be pushed to the cyc FormArray in each loop.

score 0 · Answer 8 · edited Jul 24 '20 at 18:06

0

nested form patchvalue you need to use Array after object like this:

this.userform.patchvalue({
 name: 'Ajay',
 approvers: [ {id:1} ]
})

edited Jul 24 '20 at 18:06

Stevy

2,052
6
17
31

answered Jul 24 '20 at 11:54

Hari haran

1

patch Value in a nested form control using angular2

8 Answers8

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