我有一个火力点参考这样的：

I have a firebase reference like this:

$scope.lessons = $firebaseArray(firebase.child('Lessons').orderByChild('courseID').equalTo($state.params.courseID));

我输出的教训是这样的：

I'm outputting the lessons like this:

<ul>
        <li class="lesson" ng-if="lesson.moduleID == module.$id" ng-repeat="lesson in lessons" lessonid="{{lesson.$id}}">
            <lessonedit></lessonedit>
        </li>
</ul>

我需要按优先级的教训，但是当我加入orderByPriority（）函数将火力的末尾引用它说，我只能用一个排序依据的呼叫。

I need to order the lessons by priority, but when I add the orderByPriority() function to the end of the firebase reference it says I can only use one orderBy call.

我试过的过滤器教训教训| orderByPriority ，但它说，过滤器不存在？

I tried the filter lesson in lessons | orderByPriority but it says that filter does not exist?

推荐答案

如果优先级是课的一个属性，您可以使用角过滤器的 排序依据 是这样的：

If Priority is an attribute of lesson, you can use the angular filter orderBy like this:

<ul>
    <li class="lesson" 
        ng-if="lesson.moduleID == module.$id" 
        ng-repeat="lesson in lessons | orderBy:'Priority'" 
        lessonid="{{lesson.$id}}">
        <lessonedit></lessonedit>
    </li>
</ul>