【发布时间】：2017-11-24 06:41:19
【问题描述】：
我的代码有问题，我需要使用来自 API 的 JSON 查询来选择数据。
这是我从查询中收到的 JSON 正文：
{
"status": "success",
"reservations": [
{
"id": "38199",
"subject": "Koneiden vaihto",
"modifiedDate": "2017-05-16T12:46:17",
"startDate": "2017-06-21T08:00:00",
"endDate": "2017-06-21T22:00:00",
"resources": [
{
"id": "124",
"type": "room",
"code": "FRAMIF407",
"parent": {
"id": "4",
"type": "building",
"code": "FramiF",
"name": "Frami F"
},
"name": "Frami F407 (atk 34)"
}
],
"description": ""
},
{
"id": "30505",
"subject": "Alumnitapahtuman etukäteisjärjestelyt",
"modifiedDate": "2017-04-19T09:36:02",
"startDate": "2017-06-21T08:00:00",
"endDate": "2017-06-21T22:00:00",
"resources": [
{
"id": "104",
"type": "room",
"code": "FRAMIF144",
"parent": {
"id": "4",
"type": "building",
"code": "FramiF",
"name": "Frami F"
},
"name": "Frami F144 (lasipalatsi 120)"
}
],
"description": ""
},
{
"id": "38864",
"subject": "Koneiden vaihto/säilytystila",
"modifiedDate": "2017-06-21T06:03:07",
"startDate": "2017-06-21T08:00:00",
"endDate": "2017-06-21T22:00:00",
"resources": [
{
"id": "107",
"type": "room",
"code": "FRAMIF211",
"parent": {
"id": "4",
"type": "building",
"code": "FramiF",
"name": "Frami F"
},
"name": "Frami F211 (fysioterapia/teoria)"
}
],
"description": ""
},
{
"id": "38335",
"subject": "Koneiden vaihto",
"modifiedDate": "2017-05-16T12:48:32",
"startDate": "2017-06-21T08:00:00",
"endDate": "2017-06-21T22:00:00",
"resources": [
{
"id": "127",
"type": "room",
"code": "FRAMIF410",
"parent": {
"id": "4",
"type": "building",
"code": "FramiF",
"name": "Frami F"
},
"name": "Frami F410 (atk 34)"
}
],
"description": ""
},
{
"id": "38426",
"subject": "Koneiden vaihto",
"modifiedDate": "2017-05-16T12:49:25",
"startDate": "2017-06-21T08:00:00",
"endDate": "2017-06-21T22:00:00",
"resources": [
{
"id": "128",
"type": "room",
"code": "FRAMIF411",
"parent": {
"id": "4",
"type": "building",
"code": "FramiF",
"name": "Frami F"
},
"name": "Frami F411 (atk 34)"
}
],
"description": ""
},
{
"id": "43898",
"subject": "Varattu plinttien varastointiin",
"modifiedDate": "2017-06-12T08:54:31",
"startDate": "2017-06-21T08:00:00",
"endDate": "2017-06-21T22:00:00",
"resources": [
{
"id": "106",
"type": "room",
"code": "FRAMIF210",
"parent": {
"id": "4",
"type": "building",
"code": "FramiF",
"name": "Frami F"
},
"name": "Frami F210 (teoria 36)"
}
],
"description": ""
},
{
"id": "38267",
"subject": "Koneiden vaihto",
"modifiedDate": "2017-06-21T06:03:07",
"startDate": "2017-06-21T08:00:00",
"endDate": "2017-06-21T22:00:00",
"resources": [
{
"id": "126",
"type": "room",
"code": "FRAMIF409",
"parent": {
"id": "4",
"type": "building",
"code": "FramiF",
"name": "Frami F"
},
"name": "Frami F409 (atk 34)"
}
],
"description": ""
}
]
}
我需要从正文中提取所有名称，例如：
"Frami F407 (atk 34)"，"Frami F144 (lasipalatsi 120)"，
"Frami F211 (fysioterapia/teoria)", "Frami F410 (atk 34)
这是我处理数据以获取名称的方式；
var jsonQuery = {
"startDate": startDate,
"endDate": endDate,
"building": [building]
};
var xhr = new XMLHttpRequest();
xhr.onreadystatechange = function () {
if (xhr.readyState == 4 && xhr.status == 200) {
var json = JSON.parse(xhr.responseText);
console.log(xhr.responseText);
var rooms = [];
for (var i = 0; i < json.reservations.length; i++) {
if (json.reservations[i].resources != null) {
for (var j = 0; j < json.reservations[i].resources.length; j++) {
var reservation = json.reservations[i];
var resource = json.reservations[i].resources[j];
if (resource.type === "room") {
if (rooms.indexOf("code")) {
rooms.push(resource.name);
}
}
}
}
}
}
};
xhr.open("POST", "URL", true, "API-key", "");
xhr.setRequestHeader('Content-Type', 'application/json');
xhr.send(JSON.stringify(jsonQuery));
它应该是这样工作的：https://jsfiddle.net/p474djan/3/
但问题是，当我通过JSON.parse() 运行它并检查控制台日志时，它会保留前两个名称（"Frami F407 (atk 34)" 和"Frami F144 (lasipalatsi 120)"），但会删除所有其余名称。知道为什么会这样吗？
【问题讨论】：
-
if (rooms.indexOf("code")) {应该做什么？你的意思是if (resource["code"]) {吗？ -
（或者应该完全删除那个条件？）
-
console.dir(json);的输出是什么，即保留了多少组？ -
xhr.responseText的问题是否没有包含您希望收到的完整 JSON？ （它与您在问题中粘贴的内容不匹配吗？） -
@smarx 是的，
xhr.responseText仅包含前两个"name:"元素；"name": "Frami F407 (atk 34)"和"name": "Frami F144 (lasipalatsi 120)"和姓氏只显示为空，如；"name": ""
标签： javascript arrays json xmlhttprequest element