[bug fix] use default website layout if no app layout is present (#1484)

Addresses: #491 



https://user-images.githubusercontent.com/73725297/226471380-5f6b07d9-8c8c-40ea-a2af-18d42a9f57a3.mp4

Co-authored-by: Mushfiq Rahman <mushfiqurrahman78@yahoo.com>

Author: donrestarone

app/controllers/comfy/admin/cms/layouts_controller.rb

@@ -55,8 +55,15 @@ def destroy
   def build_layout
     @layout = @site.layouts.new(layout_params)
     @layout.parent      ||= ::Comfy::Cms::Layout.find_by_id(params[:parent_id])
-    @layout.app_layout  ||= @layout.parent.try(:app_layout)
     @layout.content     ||= "{{ cms:wysiwyg content }}"
+
+    if !@layout.app_layout.blank?
+      @layout.app_layout = @layout.app_layout
+    elsif !@layout.parent.nil?
+      @layout.app_layout = @layout.parent.app_layout
+    else
+      @layout.app_layout = "website"
+    end
   end
 
   def load_layout

test/controllers/admin/comfy/layouts_controller_test.rb

@@ -66,6 +66,16 @@ class Comfy::Admin::Cms::LayoutsControllerTest < ActionDispatch::IntegrationTest
     assert_select "form[action='/admin/sites/#{site.id}/layouts']"
   end
 
+  test "default website layout should be used if a newly-created layout has no app_layout and parent" do
+    @user.update(can_access_admin: true, can_manage_web: true)
+    sign_in(@user)
+    get new_comfy_admin_cms_site_layout_url(subdomain: @restarone_subdomain, site_id: @site.id)
+
+    assert_response :success
+    assert assigns(:layout)
+    assert_equal "website", assigns(:layout).app_layout
+  end
+
   test 'denies #new if not permissioned' do
     sign_in(@user)
     get new_comfy_admin_cms_site_layout_url(subdomain: @restarone_subdomain, site_id: @site.id)