Angularjs ng-repeat数组中的数组

Question

我想在列表中显示另一个数组中的一个数组。我想使用 ng-repeat 在列表中显示数组。我尝试了各种组合，但我无法让它发挥作用。我有以下代码:

var workouts = this;  
    workouts.workoutslist = [  
        {'workoutId': 1,   
         'workoutName': "Maandag",  
         'exercises':  
                    [   
                        {exerciseId: 1,  
                        exerciseName: "exercise1"},  
                        {exerciseId: 2,  
                        exerciseName: "exercise2"}  
                    ]  
        },  
        {
            'workoutId': 2,   
            'workoutName': "Dinsdag",  
            'exercises':  
                    [ 
                        {exerciseId: 3,  
                        exerciseName: "exercise3"},  
                        {exerciseId: 4,  
                        exerciseName: "exercise4"}  
                    ]
        }
    ];

这个有效:

<li class="item" ng-repeat="workoutTest in workout.workoutslist[0].exercises">{{ workoutTest.exerciseName }}
            </li>

但这不是:

    <li class="item" ng-repeat="workoutTest in workout.workoutslist.exercises  |filter:{workoutId: workoutId}">
{{ workoutTest.exerciseName }}
                </li> 

我在第二个代码中说的不是完全一样吗？
编辑:Plunker:http://plnkr.co/edit/1VQBkuTWAVatexPMsxOd?p=preview

Answer 1

问题说明:

之所以有效，是因为它针对的是单次锻炼的练习:

workoutTest in workout.workoutslist[0].exercises

这行不通:

workoutTest in workout.workoutslist.exercises | filter:{workoutId: workoutId}

因为过滤器应用于锻炼列表数组的不存在属性“练习”。

解决方案一:

如果您想显示由 id 选择的单个锻炼的练习 - 尝试将您的锻炼定义为这样的对象:

workouts.workoutslist = { 
    "1": {
        'workoutName': "Maandag",  
        'exercises': [   
            {exerciseId: 1, exerciseName: "exercise1"},  
            {exerciseId: 2, exerciseName: "exercise2"}  
        ]  
    },  
    "2": {
        'workoutName': "Dinsdag",  
        'exercises': [ 
            {exerciseId: 3, exerciseName: "exercise3"},  
            {exerciseId: 4, exerciseName: "exercise4"}  
        ]
    }
};

并像这样访问它:

exercise in workout.workoutslist[workoutId].exercises

解决方案 2:

如果您想显示包含练习列表的锻炼列表，而不是像这样实现两级列表:

<ul>
    <li ng-repeat="w in workout.workoutslist">
        <span>{{w.workoutName}}<span>
        <ul>
            <li ng-repeat="e in w.exercises">{{e.exerciseName}}</li>
        </ul>
    </li>
</ul>