How can we recreate this ngModel text input form in a radio format for a spring boot mvc and angular application?

Question

How can we recreate this ngModel text input form in a radio format for a spring boot mvc and angular application?

As I was following a tutorial on creating an employee CRUD model using spring boot and mysql server for the backend and angular for the frontend, I encountered a form group during the creation process. The tutorial originally had a text input field for gender, but I wanted to change it into radio buttons.

<div class="form-group">
            <label>
                Gender </label>
            <input type="text" class="form-control" id="gender" required [(ngModel)]="employee.gender" name="gender">
        </div>

The above code snippet worked successfully for submitting the form with the text input field, but when I attempted to convert it into radio buttons, the submission action didn't work as expected. Here is what I tried based on a radio button example:

<div class="form-group">

            <label for [(ngModel)]="employee.gender">Gender:</label>
            <div>
                <input id="male" type="radio" value="male" name="gender" formControlName="gender">
                <label for="male">Male</label>
            </div>

            <div>
                <input id="female" type="radio" value="female" name="gender" formControlName="gender">
                <label for="female">Female</label>
            </div>
        </div>

I am still learning and my understanding of these concepts could use some improvement. Any assistance or guidance on how to correctly implement radio buttons in this scenario would be greatly appreciated. Thank you!

angular radio-button angular-ngmodel

Answer 1

Answer №1

When working with Forms in Angular, you have the option to choose between two different approaches:

Template-driven forms utilize ngModel for data binding, while Reactive forms involve working with FormControls.

The first code example provided uses the Template-driven approach, specifically showing how to implement radio buttons for selecting gender:

<div class="form-group">
  <label>Gender:</label>
  <div>
    <input id="male" type="radio" value="male" name="gender" [(ngModel)]="employee.gender">
    <label for="male">Male</label>
  </div>

  <div>
    <input id="female" type="radio" value="female" name="gender" [(ngModel)]="employee.gender">
    <label for="female">Female</label>
  </div>
</div>

If using Reactive forms instead, simply replace

[(ngModel)]="employee.gender"

with

formControlName="gender"

, assuming that a FormControl named gender has been defined within your FormGroup.

Answer 2

When working with Forms in Angular, you have the option to choose between two different approaches:

Template-driven forms utilize ngModel for data binding, while Reactive forms involve working with FormControls.

The first code example provided uses the Template-driven approach, specifically showing how to implement radio buttons for selecting gender:

<div class="form-group">
  <label>Gender:</label>
  <div>
    <input id="male" type="radio" value="male" name="gender" [(ngModel)]="employee.gender">
    <label for="male">Male</label>
  </div>

  <div>
    <input id="female" type="radio" value="female" name="gender" [(ngModel)]="employee.gender">
    <label for="female">Female</label>
  </div>
</div>

If using Reactive forms instead, simply replace

[(ngModel)]="employee.gender"

with

formControlName="gender"

, assuming that a FormControl named gender has been defined within your FormGroup.

Answer 3

Answer №2

If you need to assign the gender of an employee using radio buttons, you can follow this approach:

Group the radio buttons together and utilize the (change) event to handle setting the genders. I have provided an example below that should meet your requirements. Simply modify the example by updating the onChange(event: any) function to assign the selected value to the employee.gender.

<mat-radio-group aria-label="Select an option" (change)="onChange($event)">
  <mat-radio-button value="1">Option 1 Male</mat-radio-button>
  <mat-radio-button value="2">Option 2 Female</mat-radio-button>
  <br>
  <br>
  Selected value: {{selectedValue | json}}, send to backend sex as: {{selectedSexObj | json}}
</mat-radio-group>

@Component({
  selector: 'radio-overview-example',
  templateUrl: 'radio-overview-example.html',
  styleUrls: ['radio-overview-example.css'],
})
export class RadioOverviewExample {
  selectedSexObj = { male: false, female: false };
  selectedValue: any;
  onChange(event: any) {
    this.selectedValue = event.value;
    if (event.value == 1) {
      this.selectedSexObj = { male: true, female: false };
    } else {
      this.selectedSexObj = { male: false, female: true };
    }
  }
}

For a live demonstration, you can visit the following link: https://stackblitz.com/edit/angular-qggcqg-qydurn?file=src%2Fapp%2Fradio-overview-example.ts

Answer 4

If you need to assign the gender of an employee using radio buttons, you can follow this approach:

Group the radio buttons together and utilize the (change) event to handle setting the genders. I have provided an example below that should meet your requirements. Simply modify the example by updating the onChange(event: any) function to assign the selected value to the employee.gender.

<mat-radio-group aria-label="Select an option" (change)="onChange($event)">
  <mat-radio-button value="1">Option 1 Male</mat-radio-button>
  <mat-radio-button value="2">Option 2 Female</mat-radio-button>
  <br>
  <br>
  Selected value: {{selectedValue | json}}, send to backend sex as: {{selectedSexObj | json}}
</mat-radio-group>

@Component({
  selector: 'radio-overview-example',
  templateUrl: 'radio-overview-example.html',
  styleUrls: ['radio-overview-example.css'],
})
export class RadioOverviewExample {
  selectedSexObj = { male: false, female: false };
  selectedValue: any;
  onChange(event: any) {
    this.selectedValue = event.value;
    if (event.value == 1) {
      this.selectedSexObj = { male: true, female: false };
    } else {
      this.selectedSexObj = { male: false, female: true };
    }
  }
}

For a live demonstration, you can visit the following link: https://stackblitz.com/edit/angular-qggcqg-qydurn?file=src%2Fapp%2Fradio-overview-example.ts

How can we recreate this ngModel text input form in a radio format for a spring boot mvc and angular application?

Answer №1

Answer №2

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