javascript - AngularJS 和 JSON - 添加子对象

Question

我正在使用 AngularJS 并且在我的 Controller 中。我有我的 $scope.tree 变量来保存一个简单的 JSON 对象。我正在尝试构建嵌套树，数据来自多个 rest 调用。

在我的第一个 REST 调用之后，我成功地拥有了我的初始 $scope.tree 对象:

[
     {"name":"Item 1 Name","id":"1","parentid":"","children":[]},
     {"name":"Item 2 Name","id":"2","parentid":"","children":[]}
]

我进行了第二次 REST 调用并返回了 2 个元素:

{"name":"Item 3 Name","id":"3","parentid":"2","children":[]},
{"name":"Item 4 Name","id":"4","parentid":"2","children":[]} 

我想将这些作为适当的 child 添加到第一个电话中以结束:

[
     {"name":"Item 1 Name","id":"1","children":[]},
     {"name":"Item 2 Name","id":"2","children":[
          {"name":"Item 3 Name","id":"3","parentid":"2","children":[]},
          {"name":"Item 4 Name","id":"4","parentid":"2","children":[]}
     ]}
]

第三次调用:

{"name":"Item 5 Name","id":"5","parentid":"3","children":[]},
{"name":"Item 6 Name","id":"6","parentid":"4","children":[]} 

最后是:

[
     {"name":"Item 1 Name","id":"1","children":[]},
     {"name":"Item 2 Name","id":"2","children":[
          {"name":"Item 3 Name","id":"3","parentid":"2","children":[
              {"name":"Item 5 Name","id":"5","parentid":"3","children":[]}
          ]},
          {"name":"Item 4 Name","id":"4","parentid":"2","children":[
              {"name":"Item 6 Name","id":"6","parentid":"4","children":[]} 
          ]}
     ]}
]

在我的 Controller 中我有类似的东西:

$scope.tree = {};
$scope.restcall1 = (results of restcall)
$scope.restcall2 = (results of restcall)
$scope.restcall3 = (results of restcall)

$scope.tree = $scope.restcall1;

现在我需要加入 $scope.restcall1 和 $scope.restcall2，所以我使用 addCall2 方法构建了一个 treeBuilder 服务。

$scope.tree = treeBuilder.addBranch($scope.tree, $scope.$restcall1);

在 treeBuilder 服务中:

    addBranch: function(branch, tree){
        for (var i=0; i<branch.length; i++){
            network = _.filter(tree, function(obj){
                if(obj.id == branch[i].parentId){
                    obj.children.push(branch[i]);
                }
            });
        }
        return tree;
    },

obj.children.push(new_branch);不起作用，我尝试了其他 10 种方法 - 我发现父对象很好，但找不到将分支添加到 parent.children 的方法。正如您在上面看到的，如果有帮助，我可以使用下划线。

谢谢!

Answer 1

我对你想做的事情的基本理解是这样的:

var obj = {
    children:[]
}
obj.children.push({test:'Hello world'});
console.log(obj.children);//[Object { test="Hello world"}]

我说的对吗？