archive module: sort for backend/frontend. move get_sorted_and_filtered from orbit_backend_controller.rb to application_controller.rb

app/models/mongoid/sortable.rb

@@ -0,0 +1,34 @@
+module Mongoid
+  module Sortable
+    extend ActiveSupport::Concern
+
+    included do
+      field :sort_number, type: Integer
+
+      after_initialize :set_sort_number
+    end
+
+    module ClassMethods
+      def default_sort(sorted = true)
+        if !sorted
+          asc(:sort_number)
+        else
+          asc
+        end
+      end
+    end
+
+    private
+
+    def set_sort_number
+      if self.sort_number.nil?
+        last_record = self.class.desc(:sort_number).first
+        if last_record
+          self.sort_number = (last_record.sort_number + 10) / 10 * 10
+        else
+          self.sort_number = 10
+        end
+      end
+    end
+  end
+end