Angular Reactive Form not showing expected value

Question

I am using the FormBuilder module to create a strictly typed reactive form, but I am only able to get values to display correctly when I don't need to specify whether or not the control is disabled. For example, if I have the following:

TS:

testForm = this.fb.group({
    testControl: '123',
});

HTML: <input formControlName="testControl" type="text">

Then the input displays the value 123 as expected and I can successfully update the value with setValue. However, if I change the typescript code to:

testForm = this.fb.group({
    testControl: [{ value: '123', disabled: true}],
});

Then it defaults to the correct value, but if I ever need to change it with setValue or patchValue, it begins displaying as [object Object].

Is testControl: [{ value: '123', disabled: true}] not the correct way to initialize a control that can be disabled? Is this.testForm.get('testControl').setValue({ value: 'abcdefg', disabled: false }) not the correct way to update the value? What am I doing wrong?

I've also tried this.testForm.get('testControl').setValue('abcdefg') when updating the value, but my IDE complains that a string isn't assignable to parameter of type { value: string; disabled: boolean; }.

You can mess around with a similar example here: https://stackblitz.com/edit/angular-ntcvra?file=src/app/profile-editor/profile-editor.component.ts

You'll just have to click the "Profile Editor" button, then click "Update Profile" at the bottom and you'll see the city input change to [object Object].

Would you please share your code in codepen.io or something else? — AG_1380
– AG_1380, Commented Aug 8, 2022 at 18:08

Drenai · Accepted Answer · 2022-08-08 18:17:21Z

1

You should use control.disable() or control.enable(), where control is your this.testForm.get('testControl')

answered Aug 8, 2022 at 18:17

Drenai

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Comments

vandathron · Accepted Answer · 2022-08-08 18:29:30Z

1

use the disable() or enable() method.

    testForm = this.fb.group({
        testControl: ['123', {disabled: true}],
    });

    this.profileForm.get('address.city')?.setValue('abcdefg');
    this.profileForm.get('address.city')?.disable()

answered Aug 8, 2022 at 18:29

vandathron

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Comments

Amir · Accepted Answer · 2022-08-08 19:23:02Z

0

check this!

get address() {return this.profileForm.get('address') as FormGroup;}

updateProfile() {this.address.controls?.['city']?.setValue('123');}

answered Aug 8, 2022 at 19:23

Amir

1

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