remove all mappings from a synapse on destroy in controller. Haven't added stuff to remove mappings to controller

app/controllers/synapses_controller.rb

@@ -116,11 +116,16 @@ class SynapsesController < ApplicationController
     end
   end
 
+  
   # DELETE synapses/:id
   def destroy
     @current = current_user
     @synapse = Synapse.find(params[:id]).authorize_to_edit(@current)
 
+    @synapse.mappings.each do |m|
+      m.delete
+    end
+
     @synapse.delete if @synapse
   end
 end