Angularjs filter not null

Question

Trying to filter out items with a certain property that is not null So for:

var details = [{name:'Bill', shortDescription: null}, {name:'Sally', shortDescription: 'A girl'}]

I would like to only show one li; the one for sally. This is what I have tried with no success

<ul>
<li ng-repeat="detail in details | filter:{shortDescription:'!'}">
<p>{{detail.shortDescription}}</p>
</li>
</ul>

Any idea how I can do this without creating a custom filter? Or even so, what the custom filter would look like?

Answer 1

Angular >=1.3.16 to latest (1.5.5 at time of writing/update) use '' (empty string) (or '!!' also works)

<ul>
    <li ng-repeat="detail in details | filter:{shortDescription: ''}">
        <p>{{detail.shortDescription}}</p>
    </li>
</ul>

Example: http://jsfiddle.net/TheSharpieOne/1mnachk6/

---

Angular >=1.3.6 and <=1.3.15 use '!null'

<ul>
    <li ng-repeat="detail in details | filter:{shortDescription: '!null'}">
        <p>{{detail.shortDescription}}</p>
    </li>
</ul>

Example: http://jsfiddle.net/TheSharpieOne/4wxs67yv/

---

Angular >=1.2 and <=1.3.5 use '' (empty string) (or '!!' also works)

<ul>
    <li ng-repeat="detail in details | filter:{shortDescription: ''}">
        <p>{{detail.shortDescription}}</p>
    </li>
</ul>

Example: http://jsfiddle.net/TheSharpieOne/ovsqf17n/

---

Angular <1.2 '!!'

<ul>
    <li ng-repeat="detail in details | filter:{shortDescription: '!!'}">
        <p>{{detail.shortDescription}}</p>
    </li>
</ul>

Example: http://jsfiddle.net/TheSharpieOne/RGEdc/

---

Overall, '!!' has the best support, but '' (empty string) is recommended and intended for this .

Answer 2

According to https://github.com/angular/angular.js/issues/11573 for Angular >= 1.4, the recommendation is to use '' which matches any primitive except null/undefined.

<ul>
    <li ng-repeat="detail in details | filter:{shortDescription: ''}">
        <p>{{detail.shortDescription}}</p>
    </li>
</ul>

Answer 3

I think this is easier to read

 <ul>
    <li ng-repeat="detail in details" ng-if="detail.shortDescription">
        <p>{{detail.shortDescription}}</p>
    </li>
 </ul>

Answer 4

It is worth noting that to use the empty quotes solution, you need to leave the comparator at its default of false . You maybe be used to putting true in here in your controller filters, like this :

const myAssessments = 
       this.filterFilter(this.assessments, {userId: this.user.id}, true);

That type of strict filter wouldn't work without the final true . But you need to drop the true or make it false for a not null check to work :

const activeAndHistoric = 
      this.filterFilter(filteredAssessments, {historicYear: ''}, false);