Firebase snapshot.val() 未绑定到 $scope

Firebase snapshot.val() not binding to $scope

我正在使用 FireBase 并尝试进行一些查询,结果正在登录,但在 HTML $scope 中不可见。

var shopRef = firebaseDataService.intro;

$scope.shops = [];

var taskRef = shopRef.orderByChild("cat").equalTo("Accomodation");


taskRef.on("value", function(snapshot) {
    var snapData = snapshot.val();
    console.log(snapData);
    $scope.shops.push(snapData);

});

当我使用 $scope.$apply() 时,我设法将数据更新到商店,但它仍然没有向我的指令传递任何内容。

    <search-card shops="shops">   </search-card>
    <p> Shops are {{shops}}</p>

我用 $firebaseArray 以某种方式让它工作

  $scope.shops = $firebaseArray(taskRef);

但我仍然想知道我做错了什么以及为什么它不能使用快照。

来自angularfire docs

// read data from the database into a local scope variable
ref.on("value", function(snapshot) {

    // Since this event will occur outside Angular's $apply scope, we need to notify Angular
    // each time there is an update. This can be done using $scope.$apply or $timeout. We
    // prefer to use $timeout as it a) does not throw errors and b) ensures all levels of the
    // scope hierarchy are refreshed (necessary for some directives to see the changes)
    $timeout(function() {
      $scope.data = snapshot.val();
    });
});

似乎使用 $scope.apply() 不会刷新整个层次结构(因此也不会刷新指令)。尝试按照规定使用 $timeout 而不是


话虽如此,我认为您应该选择 $firebaseArray() 选项,因为我认为这是最 "angular" 的解决方案