我已经工作了一个星期,试图帮助一位 friend 处理他的 JQuery 数据表。该表显示了志愿者申请者以及事件的进展情况。前端页面包含 JS Datatable 脚本,ColdFusion 页面用于查询 MySQL 数据库。当页面最初加载时,调试控制台中会显示以下错误。
Uncaught TypeError: Cannot read property 'DT_RowId' of undefined
at Object.rowIdFn (jquery.dataTables.min.js:19)
at N (jquery.dataTables.min.js:16)
at HTMLTableElement.<anonymous> (jquery.dataTables.min.js:92)
at Function.each (jquery.js:374)
at n.fn.init.each (jquery.js:139)
at n.fn.init.m [as dataTable] (jquery.dataTables.min.js:82)
at HTMLDocument.<anonymous> (index.cfm:897)
at j (jquery.js:3099)
at Object.fireWith [as resolveWith] (jquery.js:3211)
at Function.ready (jquery.js:3417)
然后,当 JS 脚本刷新并重新检查数据库时,出现以下错误。
Uncaught TypeError: Cannot read property '0' of undefined
at jquery.dataTables.min.js:19
at Object.b.fnGetData (jquery.dataTables.min.js:12)
at B (jquery.dataTables.min.js:17)
at Ga (jquery.dataTables.min.js:14)
at mb (jquery.dataTables.min.js:66)
at T (jquery.dataTables.min.js:31)
at Ub (jquery.dataTables.min.js:107)
at r.<anonymous> (jquery.dataTables.min.js:108)
at r.iterator (jquery.dataTables.min.js:99)
at r.<anonymous> (jquery.dataTables.min.js:108)
这是 JS 文件的样子。我正在尝试使用 JQuery Datatable 版本 1.10。
$(document).ready(function() {
var table = $('#displayData').dataTable({
"processing": true,
"stateSave": true,
"serverSide": true,
"ajax": {
"url": "MyVolunteerCheck.cfm",
"type": "POST"
},
"columns": [{
"name": "EMPLOYEE_ID",
"className": "hidden"
},
{
"name": "EVER_NUM",
"className": "hidden",
"orderable": "true"
},
{
"name": "LAST_NAME",
"title": "LAST NAME",
"orderable": "true"
},
{
"name": "FIRST_NAME",
"title": "FIRST NAME",
"orderable": "true"
},
{
"name": "SortOrderDate",
"title": "APP DATE",
"orderable": "true"
},
{
"name": "DOCS_VER",
"className": "hidden"
},
{
"name": "DOCS_WAIT",
"title": "APP STATUS",
"orderable": "true"
},
{
"name": "APP_STATUS",
"title": "PROGRESS",
"orderable": "true"
},
{
"name": "LOCATION_NAME",
"title": "LOCATION",
"orderable": "true"
},
{
"title": "OPTIONS",
"orderable": "false"
}
],
"columnDefs": [
{ <cfset E = "+row[0]+" />
"render": function(data, type, row) {
return "<a class='btn btn-primary btn-xs' href='candidate/?select="#E#"'>view</a> <a class='btn btn-success btn-xs' href='candidate/?select=#e_id#" + "'>edit</a>";
},
"targets": -1
},
{
"render": function(data, type, row) {
var color = 'black';
if (row[5] == 1) {
color = 'green';
ColorCheck = 'VALIDATED';
IconChoice = ' fa fa-check-square-o';
} else if (row[6] == 1) {
color = 'orange';
ColorCheck = 'WAITING';
IconChoice = 'fa fa-spin fa-spinner';
} else {
color = 'red';
ColorCheck = 'NON-VALID';
IconChoice = 'fa fa-exclamation-triangle';
}
return '<span style="color:' + color + '"><i class="' + IconChoice + '"></i> ' + ColorCheck + '</span>';
},
"targets": -4
},
{
"render": function(data, type, row) {
var appstat = 'black';
if (row[5] == 1) {
appstat = 'green';
TextStatus = 'FINISHED';
IconChoice = 'fa fa-check';
} else {
appstat = 'black';
var TextStatus = row[7];
IconChoice = 'fa fa-chevron-right';
}
return '<span class="text-uppercase" style="color:' + appstat + '"><i class="' + IconChoice + '"></i> ' + TextStatus + '</span>';
},
"targets": -3
},
{
"visible": false,
"targets": [0]
}
],
"pagingType": "full_numbers",
"order": [
[2, 'asc']
],
"language": {
"lengthMenu": "Page length: _MENU_",
"search": "Filter:",
"zeroRecords": "No matching records found"
},
"data": function(sSource, aoData, fnCallback) {
aoData.push();
$.ajax({
"dataType": 'json',
"type": "POST",
"url": sSource,
"data": aoData,
"success": fnCallback
});
}
});
});
setInterval(function() {
$('#displayData').DataTable().ajax.reload();
}, 30000);
在coldfusion页面上,系统检查两个表并应返回信息,但一直出错。下面是我的 CF 页面。
<cfsilent>
<cfparam name="form.table" default="">
<cfparam name="form.columns" default="">
<cfparam name="form.editButtonText" default="">
<cfparam name="form.editButtonTarget" default="">
<cfparam name="form.search" default="">
<cfparam name="variables.fieldlist" default="">
<cfsetting showDebugOutput="true">
<cfsetting enablecfoutputonly="true">
<cfprocessingdirective suppresswhitespace="true">
<!--- this comes from the AJAX script in the template --->
<cfset variables.fieldlist=form.columns>
<cfset variables.count=0>
<!--- strip off the comma if it is the last element --->
<cfif right(variables.fieldlist,'1') EQ ",">
<!--- last char is a comma --->
<cfset variables.listLength = len(variables.fieldlist)>
<cfset variables.fieldlist = left(variables.fieldlist, variables.listLength-1)>
</cfif>
<!--- get count of records --->
<cfquery name="qGetCount" datasource="MySQLDATABASE">
SELECT COUNT(*) AS fullCount
FROM VOLTABLE1
WHERE ARCHIVE IS NULL
</cfquery>
<cfquery name="rResult" datasource="MySQLDATABASE">
SELECT VOLTABLE1.EMPLOYEE_ID, VOLTABLE1.EVER_NUM, VOLTABLE1.LAST_NAME, VOLTABLE1.FIRST_NAME, VOLTABLE1.DOCS_VER, VOLTABLE1.DOCS_WAIT, VOLTABLE1.APP_STATUS, VOLTABLE1.LOCATION_ID, DATE_FORMAT(VOLTABLE1.EMPLOYEE_DATE,'%Y-%m-%d %r') AS SortOrderDate, VOLTABLE2.LOCATION_NAME
FROM VOLTABLE1
RIGHT JOIN
VOLTABLE2
ON VOLTABLE1.LOCATION_ID = VOLTABLE2.LOCATION_ID
WHERE 1 = 1 AND VOLTABLE1.ARCHIVE IS NULL
<cfif len(form.search)>
AND (
<cfloop from="1" to="#listLen(variables.fieldlist)#" index="variables.index">
#listGetAt(variables.fieldlist, variables.index,',')# LIKE '%#form.search#%' <cfif variables.index LT listLen(variables.fieldlist)> OR </cfif>
</cfloop>
)
</cfif>
<cfif isdefined('form.iSortCol_0')>
ORDER BY
<cfloop from="0" to="#form.iSortingCols-1#" index="variables.i">
#listGetAt(variables.fieldlist,form["iSortCol_#variables.i#"]+1)# #form["sSortDir_#variables.i#"]#
<cfif variables.i is not form.iSortingCols-1>,
</cfif>
</cfloop>
</cfif>
</cfquery>
<!--- strip off the table name from the values, otherwise it will break making the json --->
<cfset variables.fieldlist = ReplaceNoCase(variables.fieldlist,'VOLTABLE1.','','all')>
<cfset variables.fieldlist = ReplaceNoCase(variables.fieldlist,'VOLTABLE2.','','all')>
<!--- This is where I think the error is happening, I've read the JQuery Datatable documentation and I still am unable to resolve the issue.--->
<cfsavecontent variable="variables.sOutput">
<cfoutput>{
"draw": #form.draw#,
"recordsTotal": #qGetCount.fullCount#,
"recordsFiltered": #rResult.recordcount#,
"data": [
<cfloop query="rResult" startrow="#form.iDisplayStart+1#" endrow="#form.iDisplayStart+form.iDisplayLength#"><cfset variables.count=variables.count+1>
[
<cfloop list="#variables.fieldlist#" index="variables.i">
<!--- custom translations --->
<cfset outputResults = ReplaceNoCase(rResult[variables.i][rResult.currentRow],'"','', 'ALL' ) />
"#outputResults#"
<cfif variables.i is not listLast(variables.fieldlist)>, </cfif>
</cfloop>
]
<cfif rResult.recordcount LT form.iDisplayStart+form.iDisplayLength>
<cfif variables.count is not rResult.recordcount AND rResult.recordcount NEQ rResult.currentRow>,</cfif>
<cfelse>
<cfif variables.count LT form.iDisplayLength>,</cfif>
</cfif>
</cfloop>
]}
</cfoutput>
</cfsavecontent>
</cfprocessingdirective>
</cfsilent>
<cfoutput>#variables.sOutput#</cfoutput>
我知道我遗漏了一些东西,或者我的 JSON 调用不正确,我已经阅读了 Stack Overflow 和 JQuery DataTable 站点,但没有真正讨论 JSON 内容的格式。有人遇到过这个问题吗?
最佳答案
尽管我将此作为答案发布,但它实际上是格式化的评论。话虽如此,如果不查看代码的完整情况,就很难知道发生了什么。但我认为您应该解决以下一些问题。一次从一件事开始。
从第一个错误开始,您会在 js 堆栈跟踪中注意到,给出最大线索的行是
at HTMLDocument.<anonymous> (index.cfm:897)
。 该行是错误的根源。请注意,第 897 行不是index.cfm
源代码中的行。 ,而是渲染的 HTML 输出的行号。这可以在浏览器的开发者工具中确定。在第二个错误中,
Uncaught TypeError: Cannot read property '0' of undefined
堆栈跟踪仅引用jquery.dataTables.min.js
所以我不可能知道错误的根源是什么。当尝试访问 undefined variable 的属性或方法时,会出现此错误。最重要的是,数据表无法引用它所期望的对象。我不确定这是做什么的:
<cfset E = "+row[0]+"/>
。您正在设置E
到文字字符串,然后将其附加到href
<a>
的属性标签?我不确定你想要什么,所以除了可能不正确之外我没有其他建议。您的
"data": function ( sSource, aoData, fnCallback ) {//stuff....}
。我不知道从哪里开始,因为我不知道您从哪里获取此代码。我的以下观点是基于这样的假设:这是您对服务器的 ajax 回调。- 据我所知,
data
选项仅用于客户端,显然您正在将其编码为服务器端 ajax 调用。 - 您的参数
sSource, aoData, fnCallback
都是旧版 1.9 属性,不属于您的代码。 - 要使用ajax,在1.10下,您必须使用选项
serverSide: true
和ajax: function ( data, callback, settings ) {//do stuff here.....}
.
- 据我所知,
您正在定义
columnDefs.render
回调两次。这是不正确的,您应该只定义一次。
综上所述,我只是好奇您从查询中检索了多少条记录?根据docs如果您的数据少于 50,000 行,则使用默认的客户端设置,datatables 的性能就很好。
顺便说一句,我个人使用过这个,它的设置非常简单,几乎毫不费力。所以我只是说你确定需要ajax吗?你可能会不必要地浪费时间。仅供思考。
关于javascript - JQuery 数据表 JSON 响应错误 ColdFusion,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/48908066/