I have implemented the Select2 plugin in my code as shown below:
JavaScript
function initAssignmentsAjax() {
$("#assignments").empty();
$( "#assignments" ).select2( {
placeholder: "Select an assignment",
allowClear: true,
ajax: {
url: "/Home/GetAssignments",
dataType: 'json',
delay: 250,
data: function ( params ) {
return {
q: params.term, // search term
page: params.page
};
},
processResults: processAssignmentsResult,
cache: true
},
escapeMarkup: function ( markup ) { return markup; },
minimumInputLength: 3,
templateSelection: assignmentsTemplateSelectionHandler,
templateResult: assignmentsTemplateResultHandler
} )
}
function processAssignmentsResult(data, params) {
var json = JSON.parse( data.Data );
var x = $.map( json, function ( item ) {
return {
text: item.ProjectNumber + ' : ' + item.BatchName,
children: item.ChildItems,
};
} )
return { results: x };
}
HTML
<select id="assignments" style="width: 500px;" ></select>
The functionality works well when I manually type values into the UI - it triggers an Ajax query to the controller and ultimately displays the values in the control.
In addition, I have included a function (based on How to programmatically inject search queries into Select2 v4?) which allows me to programmatically input a value to search.
function selectAssignments( term ) {
$( "#assignments" ).empty();
var assignmentElementControl = $( "#assignments" );
assignmentElementControl.select2( 'open' );
var $search = assignmentElementControl.data( 'select2' ).dropdown.$search || assignmentElementControl.data( 'select2' ).selection.$search;
$search.val( term );
$search.trigger( 'keyup' );
}
However, I encountered a problem where this function stops working after I initially perform a search by typing in the Select2 control. The function executes successfully if I reload the page or use it from the browser console, but it fails to trigger the Ajax search query from the Select2 control after using the manual search feature. What could be causing this issue with the Select2 UI search functionality conflicting with the custom search function?