Angular firing off select option with object properties

Within my Angular application, I am faced with a situation involving a <select> element that contains a list of <option> elements whose values are associated with objects.

My goal is to capture the last selected value using the following code:

<select (change)="onSelect($event)">
   <option *ngFor="let option of myOptions;" [ngValue]="option"> {{ option.name }} </option>
</select>
onSelect(event: Event) {
  console.log(event);
}

Therefore, my options are linked to objects (myOptions represents an array of objects).

This approach functions properly and correctly displays the {{ option.name }} string.

The challenge arises when accessing the event.target.value within my onSelect function, as it returns a string such as "1: Object", "2: Object", and so forth.

If I were to utilize [value] instead of

[ngValue]</code, a slightly different issue would arise where <code>event.target.value
would be displayed as "[object Object]".

To combat this issue, what steps can be taken to retrieve the actual selected object option when triggering the (change) event?

Answer №1

In my opinion, it is not possible to assign an object as a value; it must be a string value. For more information on this topic, check out this useful post Can the select option value be of different types?.

One approach could be to use an index for the array,

<select (change)="onSelect($event)">
   <option *ngFor="let option of myOptions; index as i;" [value]="i"> {{ option.name }} </option>
</select>

Alternatively, if you have an id in your options,

<select (change)="onSelect($event)">
   <option *ngFor="let option of myOptions" [value]="option.id"> {{ option.name }} </option>
</select>

You have several choices available.

Answer №2

attempted to implement the following code

instead of using the change event in html, utilize ngModelChange

<select [(ngModel)]="data" (ngModelChange)="dataChanged($event)" name="data">
      <option *ngFor="let currentData of allData" [ngValue]="currentData"> {{currentData.name}}</option>
</select>

in ts

allData = [{ name: "data1", id: 1 }, { name: "data2", id: 2 }];
dataChanged(event) {
    console.log(event); // you will be able to view the entire object in the console
  }

thank you

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