I have a two models Projects and users. I have a many to many relation. Means that all users can be in a project and a user van be in many porjects. A user can be a Member, Admin. i created the relation table as projects_users and added a role_id. For this i created a view that list the users in the project in check boxes, so if you check the box it became an admin, so i pass an array, but when i save i sends an ActiveRecord::ReadOnlyRecord error. def updaterole @project = Project.find(params[:id]) if 1 == 1 @test = @project.users.find(params[:user_ids]) for resource in @test resource.role_id = 2 resource.save # here is the error end flash[:notice] = ''Succeed.'' redirect_to :action => ''resources'', :id => @project else render :action => ''add'' end end --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---