Angular 资源调用和 $q [英] Angular Resource calls and $q

问题描述

各位，

我的代码设置如下:

$scope.init = function(){
  return $q.all([resource1.query(),resource2.query(),resource3.query()])
            .then(result){
               $scope.data1 = result[1];
               $scope.data2 = result1[2];
               $scope.data3 = result[3];


               console.log(data1); //prints as [$resolved: false, $then: function]

               doSomething($scope.data1,$scope.data2); 
                 }
}

我的印象是只有在所有资源都得到解析时才会调用then"函数.但是，这不是我在代码中看到的.如果我打印 data1，则无法解析.

I was under the impression that the "then" function will be called only when all the resources get resolved. However this is not what I am seeing in my code. If I print data1, I get unresolveed.

关于我在这里缺少什么的任何线索?

Any clue as to what I am missing here ??

推荐答案

我遇到了这个问题，很困惑.问题似乎是调用资源操作实际上并没有返回 http 承诺，而是一个空引用(当数据从服务器返回时填充 - 请参阅 $resource 文档).

I ran into this problem, and it was quite confusing. The problem appears to be that calling a resource action doesn't actually return an http promise, but an empty reference (that is populated when the data returns from the server -see the return value section of the $resource docs).

我不知道为什么这会导致 .then(result) 返回一组未解决的承诺，但是要获得每个资源的承诺，您需要使用 resource1.query().$promise.重写您的示例:

I'm not sure why this results in .then(result) returning an array of unresolved promises, but to get each resource's promise, you need to use resource1.query().$promise. To re-write your example:

$scope.init = function() {
  return $q.all([resource1.query().$promise, resource2.query().$promise, resource3.query().$promise])
           .then( function(result) {
             $scope.data1 = result[0];
             $scope.data2 = result[1];
             $scope.data3 = result[2];

             console.log($scope.data1);

             doSomething($scope.data1,$scope.data2); 
           })
}

我希望能帮别人节省一些时间.

I hope that saves someone else some time.

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