Fix remote form to work with rails-ujs

Refs. #3390

Author: mshibuya

app/assets/javascripts/rails_admin/ra.remote-form.js

@@ -72,21 +72,22 @@
           cancelButtonText = dialog.find(":submit[name=_continue]").html();
       dialog.find('.form-actions').remove();
 
-      form.attr("data-remote", true);
+      form.attr("data-remote", true).attr("data-type", "json");
       dialog.find('.modal-header-title').text(form.data('title'));
       dialog.find('.cancel-action').unbind().click(function(){
         dialog.modal('hide');
         return false;
       }).html(cancelButtonText);
 
       dialog.find('.save-action').unbind().click(function(){
-        form.submit();
+        window.Rails.fire(form[0], 'submit');
         return false;
       }).html(saveButtonText);
 
       $(document).trigger('rails_admin.dom_ready', [form])
 
-      form.bind("ajax:complete", function(xhr, data, status) {
+      form.bind("ajax:complete", function(event) {
+        var data = event.detail[0], status = event.detail[1];
         if (status == 'error') {
           dialog.find('.modal-body').html(data.responseText);
           widget._bindFormEvents();

lib/rails_admin/config/actions/edit.rb

@@ -31,7 +31,7 @@ class Edit < RailsAdmin::Config::Actions::Base
                 @auditing_adapter&.update_object(@object, @abstract_model, _current_user, changes)
                 respond_to do |format|
                   format.html { redirect_to_on_success }
-                  format.js { render json: {id: @object.id.to_s, label: @model_config.with(object: @object).object_label} }
+                  format.json { render json: {id: @object.id.to_s, label: @model_config.with(object: @object).object_label} }
                 end
               else
                 handle_save_error :edit

lib/rails_admin/config/actions/new.rb

@@ -42,7 +42,7 @@ class New < RailsAdmin::Config::Actions::Base
                 @auditing_adapter&.create_object(@object, @abstract_model, _current_user)
                 respond_to do |format|
                   format.html { redirect_to_on_success }
-                  format.js   { render json: {id: @object.id.to_s, label: @model_config.with(object: @object).object_label} }
+                  format.json { render json: {id: @object.id.to_s, label: @model_config.with(object: @object).object_label} }
                 end
               else
                 handle_save_error