Question

我从firebug控制台输出以下JSON数据，我试图计算第二项“打开”的总数，并按团队对结果进行分组。我从我们的SharePoint列表中提取数据。

"d":
{
    "results":
    [
        {
            "__metadata":
            {
                "id": "Web/Lists(guid'1234578785596655')/Items(53)",
                "uri": "https://spteamsite.com/_api/web/lists/GetByTitle('Teams')/Items(53)",
                "etag": ""18"",
            "type": "SP.Data.TasksListItem"
        },
            "Team": "Team A",
            "taskStatus": "Open"
},
{
                "__metadata":
{
    "id": "Web/Lists(guid'1234578785596655')/Items(54)",
    "uri": "https://spteamsite.com/_api/web/lists/GetByTitle('Teams')/Items(54)",
    "etag": ""97"",
    "type": "SP.Data.TasksListItem"
},
                "Team": "Team B",
                "taskStatus": "Open"
},
{
    "__metadata":
    {
        "id": "Web/Lists(guid'1234578785596655')/Items(82)",
        "uri": "https://spteamsite.com/_api/web/lists/GetByTitle('Teams')/Items(82)",
        "etag": ""65"",
        "type": "SP.Data.TasksListItem"
    },
    "Team": "Team B",
    "taskStatus": "Open"
},
{
                "__metadata":
{
    "id": "Web/Lists(guid'1234578785596655')/Items(97)",
    "uri": "https://spteamsite.com/_api/web/lists/GetByTitle('Teams')/Items(97)",
    "etag": ""18"",
    "type": "SP.Data.TasksListItem"
},
                "Team": "Team C",
                "taskStatus": "Open"
},
{
    "__metadata":
    {
        "id": "Web/Lists(guid'1234578785596655')/Items(99)",
        "uri": "https://spteamsite.com/_api/web/lists/GetByTitle('Teams')/Items(99)",
        "etag": ""8"",
        "type": "SP.Data.TasksListItem"
    },
    "Team": "Team E",
    "taskStatus": "Open"
},
{
                "__metadata":
{
    "id": "Web/Lists(guid'1234578785596655')/Items(106)",
    "uri": "https://spteamsite.com/_api/web/lists/GetByTitle('Teams')/Items(106)",
    "etag": ""44"",
    "type": "SP.Data.TasksListItem"
},
                "Team": "Team D",
                "taskStatus": "Open"
},

我使用了以下JavaScript，但我只得到一个不正确的值。我只得到3，这是不正确的。它应该是300或更多。为简洁起见，我只发布了我的JSON数据的摘录。

// JavaScript source code
$.ajax({
    url: _spPageContextInfo.webServerRelativeUrl + "/_api/web/lists/GetByTitle('Teams')/Items?$filter=taskStatus eq 'Open'&$select=Team,taskStatus",
    type: "GET",
    dataType: "json",
    async: "true",
    headers: {
        "accept": "application/json;odata=verbose",
    },
    success: function (data) {
        var dataArray = [];
        var countArray = [];
        var results = data.d.results;
        for (var i = 0; i < results.length; i++){
            for (key in results[i]) {
                if (results[i].hasOwnProperty(key)) {
                    countArray.push(results[i][key]);             
                }
            }
        }
        for (var i = 0; i < results.length; i++){
            var team = Object.keys(results[1]).length; //This is returning only the value of 3

            console.log(team);
        }
        console.log(countArray);
    },
    error: function(err) {
        alert(JSON.stringify(err));
    }
});

你能协助解决这个问题吗？

我已根据请求修改了原始JSON数据，以反映我从服务器获取的内容。

Answer 1

如果我正确理解你的问题，你想按团队分组然后得到开放的总和。使用linq.js很容易

var aggregatedObject = Enumerable.From(data).GroupBy("$.Team", null,function (key, g) {
                 return {
                   Team: key,
                   Open: g.Sum("$.Open")                     
                 }
    }).ToArray();

被修改

var query = Enumerable.From(jsonObject)
    .GroupBy(
        "$.City",
        null,
        "{ City: $, Count: $$.Count() }").ToArray()

Answer 2

console.log(team)的输出始终为3，因为当您调用Object.keys(results[1]).length时，您只是在第一个结果对象中找到属性（键）的数量（来自您的示例JSON数据）。

{
    "__metadata":
    {
        "id": "Web/Lists(guid'1234578785596655')/Items(53)",
        "uri": "https://spteamsite.com/_api/web/lists/GetByTitle('Teams')/Items(53)",
        "etag": "18",
        "type": "SP.Data.TasksListItem"
    },
    "Team": "Team A",
    "taskStatus": "Open"
}

结果的简单循环可以对它们进行分组：

var results = data.d.results;
var openCount = results.length;
var groupedResults = {};

//Total number of open tasks
console.log(openCount);

for (var i = 0; i < openCount; i++) {
    var team = results[i]["Team"]

    if (!groupedResults[team]) {
        groupedResults[team] = [];
    }

    groupedResults[team].push(results[i]);
}

//Open tasks grouped by team
console.log(groupedResults);

//Count of open tasks for "Team B"
console.log(groupedResults["Team B"].length);

请参阅下面的代码段，了解使用示例数据的完整功能演示。

var data = {
    "d":
    {
        "results":
        [
            {
                "__metadata":
                {
                    "id": "Web/Lists(guid'1234578785596655')/Items(53)",
                    "uri": "https://spteamsite.com/_api/web/lists/GetByTitle('Teams')/Items(53)",
                    "etag": "18",
                    "type": "SP.Data.TasksListItem"
                },
                "Team": "Team A",
                "taskStatus": "Open"
            },
            {
                "__metadata":
                {
                    "id": "Web/Lists(guid'1234578785596655')/Items(54)",
                    "uri": "https://spteamsite.com/_api/web/lists/GetByTitle('Teams')/Items(54)",
                    "etag": "97",
                    "type": "SP.Data.TasksListItem"
                },
                "Team": "Team B",
                "taskStatus": "Open"
            },
            {
                "__metadata":
                {
                    "id": "Web/Lists(guid'1234578785596655')/Items(82)",
                    "uri": "https://spteamsite.com/_api/web/lists/GetByTitle('Teams')/Items(82)",
                    "etag": "65",
                    "type": "SP.Data.TasksListItem"
                },
                "Team": "Team B",
                "taskStatus": "Open"
            },
            {
                "__metadata":
                {
                    "id": "Web/Lists(guid'1234578785596655')/Items(97)",
                    "uri": "https://spteamsite.com/_api/web/lists/GetByTitle('Teams')/Items(97)",
                    "etag": "18",
                    "type": "SP.Data.TasksListItem"
                },
                "Team": "Team C",
                "taskStatus": "Open"
            },
            {
                "__metadata":
                {
                    "id": "Web/Lists(guid'1234578785596655')/Items(99)",
                    "uri": "https://spteamsite.com/_api/web/lists/GetByTitle('Teams')/Items(99)",
                    "etag": "8",
                    "type": "SP.Data.TasksListItem"
                },
                "Team": "Team E",
                "taskStatus": "Open"
            },
            {
                "__metadata":
                {
                    "id": "Web/Lists(guid'1234578785596655')/Items(106)",
                    "uri": "https://spteamsite.com/_api/web/lists/GetByTitle('Teams')/Items(106)",
                    "etag": "44",
                    "type": "SP.Data.TasksListItem"
                },
                "Team": "Team D",
                "taskStatus": "Open"
            }
        ]
    }
};

function printResult(value) {
  var d = document.createElement('div');
  
  d.innerHTML = JSON.stringify(value);
  document.body.appendChild(d);
  console.log(value);
}

var results = data.d.results;
var openCount = results.length;
var groupedResults = {};

//Total number of open tasks
printResult("Open tasks for all teams: " + openCount);

for (var i = 0; i < openCount; i++) {
    var team = results[i]["Team"]
    
	if (!groupedResults[team]) {
        groupedResults[team] = [];
    }
    
    groupedResults[team].push(results[i]);
}

//Open tasks grouped by team
printResult(groupedResults);

//Count of open tasks for "Team B"
printResult("Open tasks for Team B: " + groupedResults["Team B"].length);

div {
  border: 1px solid black;
  margin: 10px;
}

JSON计算特定Array对象和结果分组的总数

2 个答案:

被修改