Angularjs：正确选择ng-options

Question

For the select tag with angularjs i'm doing:

<select ng-init="getdata()" data-ng-model="ob.id" 
        data-ng-options="level.id as level.desc for level in levels" 
        data-ng-selected="ob.id == level.id"> 
        <option value="0">default...</option>
</select>

... but is this the right way because there are so many other ways on the web? getdata() gets $scope.levels array.

Answer 1

Try to avoid binding to primitives (use objects instead, for instance - $scope.data). So I'd replace levels to data.levels

It's up to you where you really need getdata() call, but controller's initialisation might be a better choice.

Also, if you want to keep your View clean of data, try to declare default value in model (or in service), not in View.

Answer 2

Your way is one of the good way.

I have another way with some custom coding .

Here is a code for my sample.

Html code

 <div class="col-sm-6 form-group">
            <label for="companyName">Tenants</label>
            <select class="form-control input-lg" ng-model="selectedTenant" 
             required ng-options="i.CompanyName for i in tenants">
            </select>
        </div>

Angular Code

$http.get('/tenants')
               .success(function (response) {
                   response.push({ CompanyName: "Select", TenantId: 0 });
                   $scope.tenants = response;
                   $scope.selectedTenant = response[$scope.tenants.length - 1];
                   $scope.$apply();
               })

Answer 3

You don't need to write ng-selected, it's not necessary. Also ng-init should just be used in really specific cases ( nginit ) so as OZ mentioned it'd better to call getData() from the controller.

<select data-ng-model="ob.id" 
        data-ng-options="level.id as level.desc for level in levels"> 
    <option value="0">default...</option>
</select>

Other than that the select looks correct.