Aligning form values with model attributes in Angular for seamless data management

For my project, I need to allow users to input time along with a time unit (day/minutes). If minutes are supported, a drop-down menu should be displayed; otherwise, only the text showing days should be shown. In the mentioned <div>, I need to set the form-field timeUnit according to the model attribute selectedTimeUnit. As a newcomer to Angular, I would appreciate any assistance. Thank you in advance.

<div>
   <div class="div-table-col" *ngIf="!isMinutesAllowed()"> Enter time data
      <input type="number" min="1" step="1" formControlName="period">
      <select  formControlName="timeUnit" [(ngModel)]="selectedTimeUnit">
        <option *ngFor="let unit of getTimeUnits()" [ngValue]="unit">{{unit}}</option>
      </select>
   </div>
   <div class="div-table-col" *ngIf="isMinutesAllowed()"> Enter time data
      <input type="number" min="1" step="1" formControlName="period">
      {{ selectedTimeUnit == 'DAYS' ? 'days' : 'minutes' }}
   </div>
</div>

###########APPLIED THIS HACK NOT SURE IF THIS IS CORRECT##########

To address this issue, I have introduced an input field with a hidden type. Although I am unsure if this is the correct approach, it is functioning as required.

<div> 
  <div class="div-table-col" *ngIf="!isMinutesAllowed()"> Players who have been inactive for past
      <input type="number" min="1" step="1" formControlName="periodOfInactivity">
      <select  formControlName="timeUnit" [(ngModel)]="selectedPeriodOfActivityTimeUnit">
        <option *ngFor="let unit of getTimeUnit()" [ngValue]="unit">{{unit}}</option>
      </select>
  </div>
  <div class="div-table-col" *ngIf="isMinutesAllowed()"> Players who have been inactive for past
      <input type="number" min="1" step="1" formControlName="periodOfInactivity">
      {{ selectedPeriodOfActivityTimeUnit == 'DAYS' ? 'days' : 'minutes' }}
      <input type="hidden" formControlName="timeUnit" [(ngModel)]="selectedPeriodOfActivityTimeUnit"/>
  </div>
</div>

Answer №1

It appears that your *ngIf statement should not be a method, but rather a conditional.

<div class="div-table-col" *ngIf="!isMinutesAllowed"> Enter time data
      <input type="number" min="1" step="1" formControlName="period">
      <select  formControlName="timeUnit" [(ngModel)]="selectedTimeUnit">
        <option *ngFor="let unit of getTimeUnits()" [ngValue]="unit">{{unit}}</option>
      </select>
    </div>
    <div class="div-table-col" *ngIf="isMinutesAllowed"> Enter time data
      <input type="number" min="1" step="1" formControlName="period">
      {{ selectedTimeUnit == 'DAYS' ? 'days' : 'minutes' }}
    </div>

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