Error 403 when admin would edit a procedure with at least one dossier

app/controllers/admin_controller.rb

@@ -4,4 +4,17 @@ class AdminController < ApplicationController
   def index
     redirect_to (admin_procedures_path)
   end
+
+  def retrieve_procedure
+    id = params[:procedure_id] || params[:id ]
+
+    @procedure = current_administrateur.procedures.find(id)
+
+    unless @procedure.dossiers.count == 0
+      render json: {message: 'Procedure locked'}, status: 403
+    end
+
+  rescue ActiveRecord::RecordNotFound
+    render json: {message: 'Procedure not found'}, status: 404
+  end
 end