halp

gistfile1.js

          $("#pledge_main_pledge_id").on("change", function (event, main_pledge) {
            if (main_pledge) {
              var url    = "<%= auto_fill_custom_fields_pledges_path %>",
                  params = {main_pledge_id: $(this).val(), edit_path: true};

              $(this).parents("form").blockContent();
              $.post(url, params, function(data) {
                if(data.success) {
                  var form = $("form");

                  // Retiro o formulário atual da tela
                  form.children().remove();

                  // Colo o novo formulário com os campos preenchidos
                  form.append($(data.partial).children());

                  // Chama JS global de dependência de campos customizados
                  callCustomDataDependencies();
                  init();
                }
              });
            } else {
              $("[id^=pledge_]").val('');
              // Chama JS global de dependência de campos customizados
              callCustomDataDependencies();
              elCapability.data('modal-url', '<%= modal_capabilities_path %>');
            }
          });