change find by name to find by identifier

app/models/concerns/watchable.rb

@@ -32,9 +32,9 @@ module Watchable
   end
 
   def contribution_perc
-    project_name = params[:project_name]
+    project_identifier = params[:project_identifier]
     user_login = params[:id]
-    @project = Project.find_by_name(project_name)
+    @project = Project.find_by_identifier(project_identifier)
     @user = User.find_by_login(user_login)
 
     def cal_perc(count_user, count_all)