Getting undefined for fnGetData() in DataTables - datatables

Question

What I want is to get row data when users click on the table's tbody but I keep getting undefined for these datatables functions.
Data comes from a node-mysql module. And for testing purposes, after the table is initialized and data's propertly arrived I've set:
"fnDrawCallback" : function() {
console.log('this:' + this);
console.log('oTable.fnGetData():' + oTable.fnGetData());
console.log('JSON.stringify(oTable.fnGetData():' + JSON.stringify(oTable.fnGetData()));
console.log('JSON.stringify(oTable.fnGetData():' + JSON.stringify(oTable.fnGetData()[0]));
console.log('oTable.fnGetData()[0]:' + oTable.fnGetData()[0]);
},
The result is this:
this:[object Object] tables_offline.js:40
oTable.fnGetData():[object Object],[object Object],[object Object] tables_offline.js:41
JSON.stringify(oTable.fnGetData():[{"id":1,"age":"23","vol":26227,"tlg":4.93,"r":18.15},{"id":2,"age":"13","vol":6378,"tlg":3.97,"r":16.76},{"id":3,"age":"54","vol":131626,"tlg":6.49,"r":11.1}] tables_offline.js:42
JSON.stringify(oTable.fnGetData()[0]:{"id":1,"age":"23","vol":26227,"tlg":4.93,"r":18.15} tables_offline.js:43
oTable.fnGetData()[0]:[object Object]
It's not an array... Maybe this is the weird thing.
I've tried debugging with chrome, setting
$('#myTable').on('click', 'tr', function(){
var oTable = $('#myTable').DataTable();
debugger;
});
And here's a screenshot of what's coming from the variable oTable. I'm not sure but shouldn't I be able to see the functions right there? I can't query something like oTable.fnGetData() 'cause it's undefined.
Let me know if you need something else from my side in order for you to help me.
EDIT
What I want basicaly is to get row data when users click on the table's tbody. I can't get there since oTable = $('#myTable').DataTable(); oTable.fnGetData()' throws undefined.
I'll try to clarify a bit more.
tables_offline.js is the file that loads the datatable, there I define my oTable variable. While searching for help I came across this post (I'm using mData for the columns definition) and I'm not sure if this is the case but it may help.
I make use of fnDrawCallback just for testing oTable in the console, it's not part of the original code.
var oTable = $("#myTable").dataTable({
'fnServerParams': function (aoData) {
aoData.push({ "name": "startDate", "value": startDate });
aoData.push({ "name": "endDate", "value": endDate });
},
'sAjaxSource': '/url',
'sAjaxDataProp': '',
'bProcessing': true,
'sDom':'t',
"aoColumns": [
{ "bVisible": false, "mDataProp": "pcrc_id"},
{ "sWidth": "25%","sTitle": "age", "mDataProp": "pcrc"},
{ "sWidth": "25%","sTitle": "Vol", "mDataProp": "volumen"},
{ "sWidth": "25%","sTitle": "tlg", "mDataProp": "tlg"},
{ "sWidth": "25%","sTitle": "r", "mDataProp": "reitero",
"mRender": function ( data, type, full ) {
return data + '%';
}
}
],
"oLanguage": {
"sUrl": "/javascripts/i18n/dataTables.Spanish.json"
},
"aaSorting": [[ 0, "desc" ]],
"bSort": false,
"bInfo" : false,
"bPaginate": false,
"fnDrawCallback" : function() {
console.log('this:' + this);
console.log('oTable.fnGetData():' + oTable.fnGetData());
console.log('JSON.stringify(oTable.fnGetData():' + JSON.stringify(oTable.fnGetData()));
console.log('JSON.stringify(oTable.fnGetData()[0]:' + JSON.stringify(oTable.fnGetData()[0]));
console.log('oTable.fnGetData()[0]:' + oTable.fnGetData()[0]);
},
"bFilter": false
});
EDIT 2
New screenshot after accesing oTable when a row's clicked. If I dig deep into context I see the data but it's the full thing, not just the row clicked. I'd like to use a function to get clicked row data.

Answer 1

Remove the fnDrawCallback stuff, I think it's distracting you from the actual problem.
Try this:
var oTable = $("#myTable").dataTable({
'fnServerParams': function (aoData) {
aoData.push({ "name": "startDate", "value": startDate });
aoData.push({ "name": "endDate", "value": endDate });
},
'sAjaxSource': '/url',
'sAjaxDataProp': '',
'bProcessing': true,
'sDom':'t',
"aoColumns": [
{ "bVisible": false, "mDataProp": "pcrc_id"},
{ "sWidth": "25%","sTitle": "age", "mDataProp": "pcrc"},
{ "sWidth": "25%","sTitle": "Vol", "mDataProp": "volumen"},
{ "sWidth": "25%","sTitle": "tlg", "mDataProp": "tlg"},
{ "sWidth": "25%","sTitle": "r", "mDataProp": "reitero",
"mRender": function ( data, type, full ) {
return data + '%';
}
}
],
"oLanguage": {
"sUrl": "/javascripts/i18n/dataTables.Spanish.json"
},
"aaSorting": [[ 0, "desc" ]],
"bSort": false,
"bInfo" : false,
"bPaginate": false,
"bFilter": false
});
oTable.$('tr').click( function () {
var data = oTable.fnGetData( this );
console.log(data);
} );
Note that the oTable var is still in scope so you don't need to use var oTable = $('#myTable').DataTable().
This example is copied verbatim from the Datatables API documentation