Add form to assign targets to a record

app/controllers/sdg_management/relations_controller.rb

@@ -1,14 +1,25 @@
 class SDGManagement::RelationsController < SDGManagement::BaseController
+  before_action :load_record, only: [:edit, :update]
+
   def index
     @records = relatable_class.accessible_by(current_ability).order(:id).page(params[:page])
   end
 
   def edit
-    @record = relatable_class.find(params[:id])
+  end
+
+  def update
+    @record.sdg_target_list = params[@record.class.table_name.singularize][:sdg_target_list]
+
+    redirect_to action: :index
   end
 
   private
 
+    def load_record
+      @record = relatable_class.find(params[:id])
+    end
+
     def relatable_class
       params[:relatable_type].classify.constantize
     end