我正在尝试使用Google Apps脚本中的Javascript从对象生成数组,以便将数组写入工作表。我有一个对象campers
,其中包含一个由唯一数字标识的每个人的对象。当我尝试访问此人的记录时,我不确定。功能如下:
function processData(data){ // Returning from client with full object - parse and write to spreadsheet
Logger.log(data)
var campers = data; // All camper data and headers
var headers = campers.headers; // Array of ordered questions
var nHeaders = headers.length;
var array = []; // Array to build - each row is one camper
for (uid in campers){ // All objects in campers object
if (uid!='headers'){ // want campers only
Logger.log(uid);
Logger.log(campers[uid]);
var row = [];
for (var j=0; j<nHeaders; j++){ // Go through all questions
if(campers[uid][headers[j]]) row.push(campers[uid][headers[j]]); // Add that value to the array if it exists
else row.push(null);
}
array.push(row);
}
}
var final = ss.getSheetByName('ParseUpload');
final.getRange("A1").offset(0,0,array.length, nHeaders).setValues(array);
return;
}
当我运行它时,我得到以下日志:
[16-08-12 02:07:31:240 PDT] {headers=[Card Number, Unique ID, Last Name, First Name, Email, Status], 123456={Status=Non-Attend, Unique ID=123456, [email protected], First Name=John, Card Number=456789012, Last Name=Doe}, 987654={Status=Attend, Unique ID=987654, [email protected], First Name=Jane, Card Number=5, Last Name=Doe}, 1234567={Status=Attend, Unique ID=1234567, [email protected], First Name=John, Card Number=123456789, Last Name=Smith}}
[16-08-12 02:07:31:298 PDT] 123456
[16-08-12 02:07:31:299 PDT] undefined
[16-08-12 02:07:31:300 PDT] 987654
[16-08-12 02:07:31:301 PDT] undefined
[16-08-12 02:07:31:301 PDT] 1234567
[16-08-12 02:07:31:302 PDT] undefined
为什么uid
肯定是其中一个键的valuecampers
返回undefinedcampers[uid]
呢?我搜索了类似的问题,并找到了有关如何使用方括号表示法访问对象的参考,但是对于在已定义的内容上变得未定义(我认为)没有任何帮助。请告诉我,这里显然有什么我想念的,或者如果这确实是重复的,请直接问另一个问题。
这是以下内容的结构data
:
{
"headers": ["Card Number", "Unique ID", "Last Name", "First Name", "Email", "Status"],
"123456": {
"First Name": "John",
"Unique ID": 123456,
"Email": "test3#test.edu",
"Card Number": 456789012,
"Last Name": "Doe",
"Status": "Non-Attend"
},
"987654": {
"First Name": "Jane",
"Unique ID": 987654,
"Email": "[email protected]",
"Card Number": 5,
"Last Name": "Doe",
"Status": "Attend"
},
"1234567": {
"First Name": "John",
"Unique ID": 1234567,
"Email": "[email protected]",
"Card Number": 123456789,
"Last Name": "Smith",
"Status": "Attend"
}
}
编辑如果我campers
直接使用上面的结构在函数中定义,它可以正常工作:
function processData(){
var campers = {
"headers": ["Card Number", "Unique ID", "Last Name", "First Name", "Email", "Status"],
"123456": {
"First Name": "John",
"Unique ID": 123456,
"Email": "[email protected]",
"Card Number": 456789012,
"Last Name": "Doe",
"Status": "Non-Attend"
},
"987654": {
"First Name": "Jane",
"Unique ID": 987654,
"Email": "[email protected]",
"Card Number": 5,
"Last Name": "Doe",
"Status": "Attend"
},
"1234567": {
"First Name": "John",
"Unique ID": 1234567,
"Email": "[email protected]",
"Card Number": 123456789,
"Last Name": "Smith",
"Status": "Attend"
}
}
var headers = campers.headers; // Array of ordered questions
var nHeaders = headers.length;
var array = []; // Array to build - each row is one camper
for (uid in campers){ // All objects in campers object
if (uid!='headers'){ // want campers only
Logger.log(uid);
Logger.log(campers[uid]);
var row = [];
for (var j=0; j<nHeaders; j++){ // Go through all questions
if(campers[uid][headers[j]]) row.push(campers[uid][headers[j]]); // Add that value to the array if it exists
else row.push(null);
}
array.push(row);
}
}
Logger.log(array);
//var final = ss.getSheetByName('ParseUpload');
//final.getRange("A1").offset(0,0,array.length, nHeaders).setValues(array);
return;
}
这有帮助吗?也许有人可以campers
理解为什么本地定义有效,但是当以传入时,它不起作用data
。
编辑2我尝试了一些其他日志记录,而没有更改其余功能:
var keys = Object.keys(campers);
Logger.log(keys)
for (var uid in campers){ // All objects in campers object
if (uid!='headers'){ // want campers only
Logger.log(uid);
Logger.log(keys.indexOf(uid));
Logger.log(campers[uid]);
Logger.log(campers[keys[0]]);
Logger.log(campers[Object.keys(campers)[0]]);
Logger.log(campers[123456]);
Logger.log(campers['123456']);
var row = [];
for (var j=0; j<nHeaders; j++){ // Go through all questions
if(campers[uid][headers[j]]) row.push(campers[uid][headers[j]]); // Add that value to the array if it exists
else row.push(null);
}
array.push(row);
}
}
这是结果日志:
[16-08-12 07:37:57:069 EDT] [123456, 987654, 1234567, headers]
[16-08-12 07:37:57:070 EDT] 123456
[16-08-12 07:37:57:072 EDT] 0.0
[16-08-12 07:37:57:073 EDT] undefined
[16-08-12 07:37:57:074 EDT] undefined
[16-08-12 07:37:57:075 EDT] undefined
[16-08-12 07:37:57:075 EDT] undefined
[16-08-12 07:37:57:076 EDT] undefined
因此uid
可以在键列表中找到,但是似乎无法以某种方式访问这些值。啊!
我仍然不知道是什么引起了问题,但我找到了解决方法。感谢TJ.Crowder的评论要求我显示JSON.stringify(data)
结果,并想知道该对象是否不是标准的JavaScript对象,因此在输入函数时尝试了以下操作:
var data2 = JSON.stringify(data);
var campers = JSON.parse(data2);
出于某种原因,将对象转换为JSON
字符串然后立即返回对象是可行的。
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