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Select2 Rails Quick Tip - AJAX with Search

Hey Jason, Thanks for the quick tip on Select2, can you explain how to get the Select2 drop down with AJAX to filter the search results just like it does with the Simple Example.

I downloaded Select2 v 4.0 here is what I have so far:

      ajax: {
        url: "/clients.json",
        dataType: 'json',
        delay: 250,
        data: function (params) {
          return {
            q: params.term, // search term
            page: params.page
        processResults: function (data, page) {
          // parse the results into the format expected by Select2.
          // since we are using custom formatting functions we do not need to
          // alter the remote JSON data
          return { results: $.map( data, function(client, i) {
                    return { id: client.id, text: client.name }
                } ) };
        cache: true
      escapeMarkup: function (markup) { return markup; }, // let our custom formatter work
      theme: "bootstrap",
        placeholder: "Please select a client"