Setting a predefined value in a dropdown menu can be a challenge, especially when the default value is hardcoded in

I am working with a dropdown and I want to make All Patients the default value.

    <select [(ngModel)]="searchModel.careprovider">
      <option [value]="0">All Pateints</option>
      <option *ngFor="let user of practiceUsers" [value]="user._id.$oid">
        {{user.dn}}
      </option>
    </select>

This is how my model is defined:

searchModel: any = { location: null, practice: null, name: '', careProvider: 0 };

The practiceUsers are set like this:

  this._practice.getUsers(this.searchModel.practice).subscribe(result => {
    this.practiceUsers = result;
    this.searchModel.careProvider = 0;
  });

Despite trying various methods, the default option always appears blank. I attempted adding an object to the this.practiceUsers array after loading it, then setting the model value in different ways (both as a number and string), but nothing seems to work. In Angular 1, I would have used ng-options, but with Angular 2, only examples of using ngFor for dropdowns can be found.

Answer №1

It seems that the object attributes are case-sensitive. In your object, the attribute is referred to as careProvider, but in your template, you have used searchModel.careprovider with a lowercase p. Additionally, make sure to utilize the NgValue directive instead of the value because you are using the NgModel directive. To resolve this issue, consider the following modification:

<select [(ngModel)]="searchModel.careProvider">
  <option [ngValue]="0">All Patients</option>
  <option *ngFor="let user of practiceUsers" [ngValue]="user._id.$oid">
    {{user.dn}}
  </option>
</select>

Answer №2

You can tackle this issue by utilizing the [selected] attribute in your code. A similar problem was successfully resolved using the following method:

<select>
   <option *ngFor="let option of choices" value="{{option.value}}" [selected]="option === chosenOption">
      {{option.label}}
   </option>
</select>

I trust that this solution will provide some assistance.

Answer №3

<div class="response" id="policeid_country_id" name="policeid_country_id" formControlName="policeid_country_id">
    <option [ngValue]="null">Choose Country</option>
    <option [ngValue]="country.id" *ngFor="let country of countries">{{country.country}}</option>
</select>

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