javascript - 使用现有的 json 结构在 javascript 中构建 json 格式

Question

我在变量中有一个 json 结构，说“数据”，就像这样

{
"SearchWithMasterDataDIdAndScandefinitionDAO": [
    {
        "dateDm_id": 20120602,
        "issueValue": "ELTDIWKZ",
        "scanName": "Company Stored as Person (Given Name)",
        "severityCode": 1,
        "severityName": "High",
        "totalDiscovered": 1
    },
    {
        "dateDm_id": 20120602,
        "issueValue": "LTDFPVOI",
        "scanName": "Company Stored as Person (Given Name)",
        "severityCode": 1,
        "severityName": "High",
        "totalDiscovered": 1
    },
    {
        "dateDm_id": 20121005,
        "issueValue": "LTDILWGY",
        "scanName": "Company Stored as Person (Given Name)",
        "severityCode": 1,
        "severityName": "High",
        "totalDiscovered": 1
    },
    {
        "dateDm_id": 20121005,
        "issueValue": "YMORCLTD",
        "scanName": "Company Stored as Person (Given Name)",
        "severityCode": 1,
        "severityName": "High",
        "totalDiscovered": 1
    }
]
}

现在我想将这个结构更改为这样的其中每个对象的 datedm_id 成为新 json 结构的根，以数组作为值新的通缉结构:

{
"20120602": [
    {
        "issueValue": "ELTDIWKZ",
        "scanName": "Company Stored as Person (Given Name)",
        "severityCode": 1,
        "severityName": "High",
        "totalDiscovered": 1
    },
    {
        "issueValue": "LTDFPVOI",
        "scanName": "Company Stored as Person (Given Name)",
        "severityCode": 1,
        "severityName": "High",
        "totalDiscovered": 1
    }
],
"20121005": [
    {
        "issueValue": "YMORCLTD",
        "scanName": "Company Stored as Person (Given Name)",
        "severityCode": 1,
        "severityName": "High",
        "totalDiscovered": 1
    },
    {
        "issueValue": "COOPER",
        "scanName": "Company Stored as Person (Given Name)",
        "severityCode": 1,
        "severityName": "High",
        "totalDiscovered": 15
    }
]
}

请帮我解决这个问题

Answer 1

参见 fiddle :http://jsfiddle.net/YVB2Y/

总之，您需要在 for 循环内创建一个对象。

var returnVar = {}
b.SearchWithMasterDataDIdAndScandefinitionDAO.forEach(function(item){
    var thisItem;
    if(returnVar[item.dateDm_id] == undefined){
        thisItem = [];
        returnVar[item.dateDm_id]  = thisItem;
    }
    else {
        thisItem = returnVar[item.dateDm_id];
    }

    var obj = {};

    obj.issueValue = item.issueValue;
    //and so on..

    thisItem.push(obj);

});

console.log(returnVar);