javascript - 使用下划线操作javascript对象

Question

我有一个 Javascript 对象，其格式如下所示

"items":
         {
         "Groups":[
            {
               "title":"group 1",
               "SubGroups":[
                  {
                     "title":"sub1",
                     "id" : "1",
                     "items":[
                        {
                           "title":"Ajax request 1",
                        },
                        {
                           "title":"Ajax request 2",
                        }
                     ]
                  },
                    {
                     "title":"sub2",
                     "id" : "2",
                     "items":[
                        {
                           "title":"Ajax request 3",
                        },
                        {
                           "title":"Ajax request 4",
                        }
                     ]
                  }
               ]
            }
         ]

有 n 个“组”、n 个“子组”和 n 个“项目”。

我首先要做的是根据 id 从特定组中获取所有项目。这是通过以下方式实现的:

_.each(items.Groups, function(o) {
     result = _.where(o.SubGroups, {
    'id': '1'
  });
});

返回

"items":[{"title":"Ajax request 1",},{"title":"Ajax request 2",}]

然后我想得到剩下的数据，不包括我刚刚检索到的项目和父组。

我试过这个:

_.each(items.Groups, function(o) {
        arr = _.without(o.SubGroups, _.findWhere(o.SubGroups, {id: '2'}));
  });

但这只会返回如下项目:

{
 "title":"sub2",
 "id" : "2",
 "items":[{"title":"Ajax request 3"},{"title":"Ajax request 4",}]
}

而我需要的是:

 "items":
             {
             "Groups":[
                {
                   "title":"group 1",
                   "SubGroups":[
                        {
                         "title":"sub2",
                         "id" : "2",
                         "items":[
                            {
                               "title":"Ajax request 3",
                            },
                            {
                               "title":"Ajax request 4",
                            }
                         ]
                      }
                   ]
                }
             ]

Answer 1

试试这个:

_.each(items.Groups, function(o) {
    arr = _.without(o, _.findWhere(o.SubGroups, {id: '2'}));
});

o 应该足够了 => 您想要获取组而不是子组。