Javascript jQuery数据表处理空子对象

我正在使用jQuery DataTables，但当我的JSON子对象为

null

时遇到问题。My JSON有一个嵌套对象

地址

，它可以是

null

，因此

地址。下面的streetAddress1

返回一个错误/警告

DataTables警告：表id=目录表-为第0行请求了未知参数“address.streetAddress1”。有关此错误的详细信息，请参阅

有没有一种方法可以处理

null

值，使其只是一个空白字符串

$(document).ready(function() {
    $('#directory-table').dataTable( {
        "lengthMenu": [ 10, 25, 50, 100 ],
        "dom": 'C<"clear">lfrtip',
        "ajax": {
            "url": "directory.json",
            "dataSrc" : ""
        },
        scrollX:true,
        "columns": [
            {"data" : "fileId"},
            {"data" : "fileName"},
            {"data" : "institutionId"},
            {"data" : "id"},
            {"data" : "firstName"},
            {"data" : "middleName"},
            {"data" : "lastName"},
            {"data" : "prefix"},
            {"data" : "suffix"},
            {"data" : "preferredName"},
            {"data" : "gender"},
            {"data" : "deleteFlag"},
            {"data" : "campusId"},
            {"data" : "buildingId"},
            {"data" : "primaryEmail"},
            {"data" : "secondaryEmail"},
            {"data" : "primaryPhone"},
            {"data" : "secondaryPhone"},
            {"data" : "address.streetAddress1"},
            {"data" : "address.city"},
            {"data" : "address.state"},
            {"data" : "address.zipCode"},
            {"data" : "orcid"},
            {"data" : "trResearcherId"},
            {"data" : "status.name"},
            {"data" : "roomNumber"},
            {"data" : "createdAt"},
            {"data" : "updatedAt"}
        ]
    } );
} );

此记录有一个

地址

：

{"fileId":2,"fileName":"9999_DIRECTORY.csv","institutionId":1,"id":"EVER1003","firstName":"George","lastName":"Clooney","middleName":null,"prefix":null,"suffix":null,"preferredName":null,"gender":"M","deleteFlag":"N","campusId":null,"primaryEmail":"cclooney","secondaryEmail":null,"primaryPhone":null,"secondaryPhone":null,"address":null,"buildingId":null,"orcid":null,"trResearcherId":null,"status":{"id":0,"name":"Processed"},"tags":null,"roomNumber":null,"createdAt":"2015-07-22 15:41 PM GMT","updatedAt":"2015-07-22 15:41 PM GMT"}

{"fileId":2,"fileName":"9999_DIRECTORY.csv","institutionId":1,"id":"EVER1013","firstName":"Monica","lastName":"Galler","middleName":null,"prefix":null,"suffix":null,"preferredName":null,"gender":"F","deleteFlag":"N","campusId":"CAMP1000","primaryEmail":"monica@gmail.com","secondaryEmail":null,"primaryPhone":null,"secondaryPhone":null,"address":{"id":0,"streetAddress1":"123 Fake Street","streetAddress2":null,"city":"Cincinnati","state":"OH","stateId":0,"zipCode":"32444"},"buildingId":null,"orcid":null,"trResearcherId":null,"status":{"id":0,"name":"Processed"},"tags":null,"roomNumber":null,"createdAt":"2015-07-23 14:31 PM GMT","updatedAt":"2015-07-24 18:18 PM GMT"}

使用选项

根据报告：

此外，此选项在加载JSON数据时非常有用，因为如果发现JSON中的单元格值为

null

（例如，您可以将默认字符串设置为“notavailable”），则将使用此处设置的值

例如：

        {"data" : "address.streetAddress1", "defaultContent": ""},
        {"data" : "address.city", "defaultContent": ""},
        {"data" : "address.state", "defaultContent": ""},
        {"data" : "address.zipCode", "defaultContent": ""},

$(document).ready(function() {
  $('#directory-table').dataTable( {
    "lengthMenu": [ 10, 25, 50, 100 ],
    "dom": 'C<"clear">lfrtip',
    "ajax": {
        "url": "directory.json",
        "dataSrc" : ""
    },
    scrollX:true,
    "aoColumns": [
        {"mData" : "fileId",
         "mRender": function( data, type, full) {
           if( data !== null ){
             return data;
           }
           else{
             return "";
           }
         },
         //More column definitions

---

使用aoColumns，您可以指定mRender参数函数调用，以检查所涉及的值是否为null。例如：

        {"data" : "address.streetAddress1", "defaultContent": ""},
        {"data" : "address.city", "defaultContent": ""},
        {"data" : "address.state", "defaultContent": ""},
        {"data" : "address.zipCode", "defaultContent": ""},

$(document).ready(function() {
  $('#directory-table').dataTable( {
    "lengthMenu": [ 10, 25, 50, 100 ],
    "dom": 'C<"clear">lfrtip',
    "ajax": {
        "url": "directory.json",
        "dataSrc" : ""
    },
    scrollX:true,
    "aoColumns": [
        {"mData" : "fileId",
         "mRender": function( data, type, full) {
           if( data !== null ){
             return data;
           }
           else{
             return "";
           }
         },
         //More column definitions

$（文档）.ready（函数（）{
$（“#目录表”）。数据表（{
“长度菜单”：[10,25,50,100]，
“dom”：“Clfrtip”，
“ajax”：{
“url”：“directory.json”，
“dataSrc”：”
},
是的，
“aoColumns”：[
{“mData”：“fileId”，
“mRender”：功能（数据、类型、完整）{
如果（数据！==null）{
返回数据；
}
否则{
返回“”；
}
},
//更多列定义

---

能否显示JSON中有空值的部分？您使用的是什么版本的DataTables？我添加了示例JSON。我使用的是1.10.7版。