AngularJs:基于Model添加类

Question

如果某事是真的,只是尝试应用一个类.关于http://docs.angularjs.org/api/ng.directive:ngClass的文档非常简短

试图favorite在liif 上添加一类1 === true

这是我的模拟对象

    $scope.restaurantListFromSearch = [
        {restaurantName: "Zocala",
        details: {
            image: "http://placehold.it/124x78",
            url: "#",
            cuisineType: ["Sandwiches", "American", "BBQ"],
            description: "Modern, healthy, awesome BBW",
            priceRange: "$",
            userFavorite: 0
        }},
        {restaurantName: "Subway",
        details: {
            image: "http://placehold.it/124x78",
            url: "#",
            cuisineType: ["Sandwiches", "American", "BBQ"],
            description: "Modern, healthy, awesome BBW",
            priceRange: "$",
            userFavorite: 1
        }},
        {restaurantName: "Hungry Howies",
        details: {
            image: "http://placehold.it/124x78",
            url: "#",
            cuisineType: ["Sandwiches", "American", "BBQ"],
            description: "Modern, healthy, awesome BBW",
            priceRange: "$",
            userFavorite: 0
        }}                      
    ];

这是我的标记.

        <ul>
            <li ng-repeat="restaurant in restaurantListFromSearch" ng-class="{restaurant.details.userFavorite === 1: favorite}">
                <img src="{{restaurant.details.image}}" alt="{{restaurant.restaurantName}}">

                <div class="details">
                    <a href="{{restaurant.details.url}}">{{restaurant.restaurantName}}</a>
                    <span class="cuisine-type">{{restaurant.details.cuisineType}}</span>
                    <p>{{restaurant.details.description}}</p>
                    <span class="price-rating">{{restaurant.details.priceRange}}</span>
                </div>

                <div class="clear"></div>   
            </li><!-- end restaurant result -->                                                                 
        </ul>

添加jsFiddle以提高可读性,由于缺少依赖项(requireJs等),实际上没有工作

http://jsfiddle.net/HtJDy/

谁能指出我正确的方向？:}

Answer 1

ngClass正在寻找要评估的角度表达式,"评估结果可以是表示空格分隔的类名,数组或类名映射到布尔值的字符串."

对于你的例子来说,它与你的想法有点相反,左边部分是你想要添加的类,右边是布尔表达式.

<li ng-repeat="restaurant in restaurantListFromSearch" ng-class="{ favorite : restaurant.details.userFavorite == 1}">

像这样的对象映射允许您根据需要拥有多个类:

<li ng-repeat="restaurant in restaurantListFromSearch" ng-class="{ favorite : restaurant.details.userFavorite == 1, otherClass: otherBooleanExpression }">

另请注意,布尔表达式不是JavaScript ......如果插入严格等于'===',则会出错.

希望有所帮助!