Assign a value to a FormControl in Angular 6

Question

Assign a value to a FormControl in Angular 6

I have 60 properties linked to 60 controls through the mat-tab in a form. When it comes to editing mode, I need to assign values to all the controls.

One approach is as follows:

this.form.controls['dept'].setValue(selected.id);

This involves locating each control and setting its value individually.

Is there a simpler method, such as:

this.form.setValue(modelName);

Or any other easier way for me to set values without having to write 60 lines of code?

My forms are built using ReactiveForms.

angular typescript

Answer 1

Answer №1

Your approach to handling the model and control relationship may need some adjustments. One method you could try is iterating through the keys of the form controls and setting the values accordingly. Here's an example of how you can do this:

const keys = Object.key(this.form.controls);

keys.forEach((key: string) => {
  this.form.controls[key].setValue(model[key]);
});

If you are creating the controls in a loop, consider setting the values during the creation process.

This resource provided valuable insights on achieving a similar task: https://alligator.io/angular/reactive-forms-formarray-dynamic-fields/

Answer 2

Your approach to handling the model and control relationship may need some adjustments. One method you could try is iterating through the keys of the form controls and setting the values accordingly. Here's an example of how you can do this:

const keys = Object.key(this.form.controls);

keys.forEach((key: string) => {
  this.form.controls[key].setValue(model[key]);
});

If you are creating the controls in a loop, consider setting the values during the creation process.

This resource provided valuable insights on achieving a similar task: https://alligator.io/angular/reactive-forms-formarray-dynamic-fields/

Answer 3

Answer №2

To apply the patch value, follow these steps:

const data = {
  name: 'John',
  age: 30
};

this.updateForm.patchValue(data);

Answer 4

To apply the patch value, follow these steps:

const data = {
  name: 'John',
  age: 30
};

this.updateForm.patchValue(data);

Answer 5

Answer №3

If the properties of your model match the attributes of your form (meaning that the model is fully mapped to the form), then you can utilize the setValue method from the Reactive Form.

Your implementation would look like this:

this.form.setValue(yourModelObject)

By doing this, all attributes of your model will be assigned to the corresponding attributes in your form.

Answer 6

If the properties of your model match the attributes of your form (meaning that the model is fully mapped to the form), then you can utilize the setValue method from the Reactive Form.

Your implementation would look like this:

this.form.setValue(yourModelObject)

By doing this, all attributes of your model will be assigned to the corresponding attributes in your form.

Assign a value to a FormControl in Angular 6

Answer №1

Answer №2

Answer №3

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