YADCF custom_func not calling custom function - yadcf

Question

I have a database field that contains either integer 1 (representing the value 'document') or integer 2 (representing the value 'email') and I use datatables to format/display these integers as the words 'document' or 'email' within the table column. I would therefore like to use YADCF to be able to select 'document' or 'email' and have datatables filter the resultset accordingly.
Link to screen shot of table column.
I have used the custom_func feature as follows (code stripped down for brevity), but regardless of all other aspects of the datatable looking and working correctly, with a filter selector looking as expected and holding the selected value, and no console errors, my custom function is not being called. I have tried manually calling the custom function immediately before initialising YADCF, to check the scope, and it is being called just fine. Can anyone see anything obviously wrong please?
$(document).ready(function() {
function customFilterDocEmail(filterVal, columnVal) {
alert('customFilterDocEmail called');
var found;
if (columnVal === '') {
return true;
}
switch (filterVal) {
case 'doc':
found = columnVal === '1';
break;
case 'email':
found = columnVal === '2';
break;
default:
found = 1;
break;
}
if (found !== -1) {
return true;
}
return false;
}
})
var table = $('#table').DataTable({
serverSide: true,
processing: true,
ajax: {
url: '/api/datatables/getJson/doctext/doctexts',
type: 'POST',
data: function(d) {d.CSRFToken = '****';}
},
stateSave: true,
responsive: true,
pageLength: 25,
order: [[0, 'asc']],
columns: [
{ data: 'txt_type', width: '10%' },
{ data: 'txt_title' },
{ data: 'txt_name', width: '20%' },
{ data: 'link', orderable: false, width: '5%' },
],
}
});
yadcf.init(table, [
{ column_number: 0, filter_type: 'custom_func', custom_func: customFilterDocEmail,
data: [{ value: 'doc', label: 'Document' }, { value: 'email', label: 'Email' }] },
{ column_number: 1, column_data_type: 'text', filter_type: 'text', filter_delay: 500, filter_default_label: '', },
{ column_number: 2, column_data_type: 'text', filter_type: 'text', filter_delay: 500, filter_default_label: '', },
], 'footer');
YADCF Version: 0.9.3.beta.11
DataTables Version: 1.10.16
UPDATE: I haven't a clue what I'm doing wrong above, but I have come up with a little hack that saves having to use 'custom_func' and a custom filter. I've used the standard 'select' filter type but intercepted the filter string within the filter() method of my DatatablesSSP script thus:
$str = $requestColumn['search']['value'];
// returned search values for doctext 'txt_type' are Document/Email, so we need to map these to 1/2.
if ($column['db'] == 'txt_type') {
if ($str == 'Document') { $str = '1'; }
if ($str == 'Email') { $str = '2'; }
}
This works a treat :)

Answer 1

You have to place the customFilterDocEmail function outside of the $(document).ready block so it will be global and yadcf will see it