Javascript 无法读取属性'；beginTimeSeconds'；未定义的

在解析

嵌套json

文件时，我看到下面的错误

Cannot read property 'beginTimeSeconds' of undefined

嵌套Json:

{"facets":[{"total":{"results":[{"count":448}],"beginTimeSeconds":0,"endTimeSeconds":0,"inspectedCount":448},"timeSeries":[{"results":[{"count":38}],"beginTimeSeconds":1491300260,"endTimeSeconds":1491301160,"inspectedCount":38},{"results":[{"count":28}],"beginTimeSeconds":1491301160,"endTimeSeconds":1491302060,"inspectedCount":28},{"results":[{"count":35}],"beginTimeSeconds":1491302060,"endTimeSeconds":1491302960,"inspectedCount":35},{"results":[{"count":34}],"beginTimeSeconds":1491302960,"endTimeSeconds":1491303860,"inspectedCount":34},{"results":[{"count":39}],"beginTimeSeconds":1491303860,"endTimeSeconds":1491304760,"inspectedCount":39},{"results":[{"count":37}],"beginTimeSeconds":1491304760,"endTimeSeconds":1491305660,"inspectedCount":37},{"results":[{"count":36}],"beginTimeSeconds":1491305660,"endTimeSeconds":1491306560,"inspectedCount":36},{"results":[{"count":36}],"beginTimeSeconds":1491306560,"endTimeSeconds":1491307460,"inspectedCount":36},{"results":[{"count":45}],"beginTimeSeconds":1491307460,"endTimeSeconds":1491308360,"inspectedCount":45},{"results":[{"count":38}],"beginTimeSeconds":1491308360,"endTimeSeconds":1491309260,"inspectedCount":38},{"results":[{"count":45}],"beginTimeSeconds":1491309260,"endTimeSeconds":1491310160,"inspectedCount":45},{"results":[{"count":37}],"beginTimeSeconds":1491310160,"endTimeSeconds":1491311060,"inspectedCount":37}],"name":"b20"}]}

var json = {above--nested--json}
$.each(json.facets, function(i, item) {
            var obj = json.facets[i];
            name = json.facets[i].name;
            console.log(json.facets[0]);
            data.addColumn('string', name);
            $.each(json.facets[i], function(j, item) {
                console.log('Time Series : '+json.facets[i]);
                curtime = json.facets[i].timeSeries[j].beginTimeSeconds;
                curcount = json.facets[i].timeSeries[j].inspectedCount;
                curname = name + ' : ' + curcount;
            });

            data.addRows([ [ new Date(curtime * 1000), curname ] ]);
        });

编写了以下代码：

{"facets":[{"total":{"results":[{"count":448}],"beginTimeSeconds":0,"endTimeSeconds":0,"inspectedCount":448},"timeSeries":[{"results":[{"count":38}],"beginTimeSeconds":1491300260,"endTimeSeconds":1491301160,"inspectedCount":38},{"results":[{"count":28}],"beginTimeSeconds":1491301160,"endTimeSeconds":1491302060,"inspectedCount":28},{"results":[{"count":35}],"beginTimeSeconds":1491302060,"endTimeSeconds":1491302960,"inspectedCount":35},{"results":[{"count":34}],"beginTimeSeconds":1491302960,"endTimeSeconds":1491303860,"inspectedCount":34},{"results":[{"count":39}],"beginTimeSeconds":1491303860,"endTimeSeconds":1491304760,"inspectedCount":39},{"results":[{"count":37}],"beginTimeSeconds":1491304760,"endTimeSeconds":1491305660,"inspectedCount":37},{"results":[{"count":36}],"beginTimeSeconds":1491305660,"endTimeSeconds":1491306560,"inspectedCount":36},{"results":[{"count":36}],"beginTimeSeconds":1491306560,"endTimeSeconds":1491307460,"inspectedCount":36},{"results":[{"count":45}],"beginTimeSeconds":1491307460,"endTimeSeconds":1491308360,"inspectedCount":45},{"results":[{"count":38}],"beginTimeSeconds":1491308360,"endTimeSeconds":1491309260,"inspectedCount":38},{"results":[{"count":45}],"beginTimeSeconds":1491309260,"endTimeSeconds":1491310160,"inspectedCount":45},{"results":[{"count":37}],"beginTimeSeconds":1491310160,"endTimeSeconds":1491311060,"inspectedCount":37}],"name":"b20"}]}

var json = {above--nested--json}
$.each(json.facets, function(i, item) {
            var obj = json.facets[i];
            name = json.facets[i].name;
            console.log(json.facets[0]);
            data.addColumn('string', name);
            $.each(json.facets[i], function(j, item) {
                console.log('Time Series : '+json.facets[i]);
                curtime = json.facets[i].timeSeries[j].beginTimeSeconds;
                curcount = json.facets[i].timeSeries[j].inspectedCount;
                curname = name + ' : ' + curcount;
            });

            data.addRows([ [ new Date(curtime * 1000), curname ] ]);
        });

打印时，

console.log（json.facets[0].timeSeries[0].beginTimeSeconds）

正在打印，但是

json.facets[I].timeSeries[j].beginTimeSeconds

根本不起作用

非常感谢您的帮助

---

提前谢谢

代码中的问题是调用的是

$。每个

在不同的对象上，而不是数组上。因此，您似乎期望像

j

这样的变量保存包含元素索引的整数，而实际上它们保存对象中属性的

键

要解决此问题，您可以使用对对象的引用来简化代码，这些对象是
$。每个
在处理程序函数参数中为您提供的，如下所示：

$.each(json.facets, function(i, facet) {
  name = facet.name;
  data.addColumn('string', name);

  $.each(facet.timeSeries, function(j, timeSeries) {
    curtime = timeSeries.beginTimeSeconds;
    curcount = timeSeries.inspectedCount;
    var curname = name + ' : ' + curcount;

    // do something with curname here...
  });

  data.addRows([
    [new Date(curtime * 1000), curname]
  ]);
});


var json={
“方面”：[{
“总数”：{
“结果”：[{
“计数”：448
}],
“beginTimeSeconds”：0，
“endTimeSeconds”：0，
“检查计数”：448
},
“时间序列”：[{
“结果”：[{
“计数”：38
}],
“beginTimeSeconds”：1491300260，
“endTimeSeconds”：1491301160，
“检查计数”：38
}, {
“结果”：[{
“计数”：28
}],
“beginTimeSeconds”：1491301160，
“endTimeSeconds”：1491302060，
“检查计数”：28
}, {
“结果”：[{
“计数”：35
}],
“beginTimeSeconds”：1491302060，
“endTimeSeconds”：1491302960，
“检查计数”：35
}, {
“结果”：[{
“计数”：34
}],
“beginTimeSeconds”：1491302960，
“endTimeSeconds”：1491303860，
“检查计数”：34
}, {
“结果”：[{
“计数”：39
}],
“beginTimeSeconds”：1491303860，
“endTimeSeconds”：1491304760，
“检查计数”：39
}, {
“结果”：[{
“计数”：37
}],
“beginTimeSeconds”：1491304760，
“endTimeSeconds”：1491305660，
“检查计数”：37
}, {
“结果”：[{
“计数”：36
}],
“beginTimeSeconds”：1491305660，
“endTimeSeconds”：1491306560，
“检查计数”：36
}, {
“结果”：[{
“计数”：36
}],
“beginTimeSeconds”：1491306560，
“endTimeSeconds”：1491307460，
“检查计数”：36
}, {
“结果”：[{
“计数”：45
}],
“beginTimeSeconds”：1491307460，
“endTimeSeconds”：1491308360，
“检查计数”：45
}, {
“结果”：[{
“计数”：38
}],
“beginTimeSeconds”：1491308360，
“endTimeSeconds”：1491309260，
“检查计数”：38
}, {
“结果”：[{
“计数”：45
}],
“beginTimeSeconds”：1491309260，
“endTimeSeconds”：1491310160，
“检查计数”：45
}, {
“结果”：[{
“计数”：37
}],
“beginTimeSeconds”：1491310160，
“endTimeSeconds”：1491311060，
“检查计数”：37
}],
“名称”：“b20”
}]
}
$.each（json.facets，函数（i，facet）{
name=facet.name；
//data.addColumn（'string'，name）；
$.each（facet.timeSeries，函数（j，timeSeries）{
curtime=timeSeries.beginTimeSeconds；
curcount=timeSeries.inspectedCount；
curname=name+'：'+curcount；
console.log（curname）；
});
/*
data.addRows([
[新日期（curtime*1000），curname]
]);
*/
});
这里使用JSON是什么意思？变量
json
是字符串吗？JSON！=我现在有一个问题。这里json是一个包含嵌套json字符串的变量。已将json字符串添加到此问题。