Unable to bind to ngModel as it returned as "undefined" in Angular 8

Whenever I bind a property to ngModel, it consistently returns undefined

  <div>
            <input
              type="radio"
              name="input-alumni"
              id="input-alumni-2"
              value="true"
              [(ngModel)]="isAlumni"
              (change)="handleAlumiSelect($event)"
              required
            />
            <label for="input-alumni-2">&nbsp;Yes</label>
          </div>
<div>
            <input
              type="radio"
              name="input-alumni"
              id="input-alumni-1"
              value="false"
              [(ngModel)]="isAlumni"
              (change)="handleAlumiSelect($event)"
            />
            <label for="input-alumni-1">&nbsp;No</label>
          </div>

In my handleAlumiSelect function, I console.log the following:

public isAlumni: any;
  handleAlumiSelect(e: any) {
    console.log('handleAlumiSelect');
    console.log(e.target.value);
    console.log(this.isAlumni);
  }

While e.target.value displays the correct answer, this.isAlumni constantly remains as "undefined". Can someone explain why this happens?

Answer №1

Avoid utilizing the value attribute in conjunction with ngModel, be sure to delete it prior to use.

 <input type="radio" name="alumni-input" id="alumni-input-1" [(ngModel)]="isGraduate" (change)="selectAlumniStatus($event)"/>

Answer №2

After thoroughly reviewing my code, I realized that there were actually no issues with it. The errors were instead found in my HTML file, as I had been transitioning from an AngularJS project. These mistakes were potentially impacting the binding process. To resolve this issue, I decided to remove all problematic code segments, which ultimately allowed the ngmodel to function correctly.

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