app/controllers/gangs_controller.rb

@@ -18,12 +18,15 @@ class GangsController < ApplicationController
   end
 
   def update
-    if gang_params[:chip_scale].to_i.positive?
-      Gang.update(gang_params)
+    if params[:id]
+      gang = Gang.find(params[:id])
+      gang.update!(gang_params)
       json_response onboarded: true
     else
       error_response :bad_request
     end
+  rescue StandardError
+    error_response :bad_request
   end
 
   private