ruby on rails - Couldn't find Timetable with 'id'=clas -

generated timetable scaffold. later created new action "clas" in timetables_controller.rb.

timetables_controller.rb

class timetablescontroller < applicationcontroller before_action :set_timetable, only: [:show, :edit, :update, :destroy, :clas] def clas   @classtimetable = timetable.where(params[:clas]) end  //other actions  def set_timetable   @timetable = timetable.find(params[:id]) end  def timetable_params   params.require(:timetable).permit(:day, :clas, :one_teacher, :one_sub, :two_teacher, :two_sub, :three_teacher, :three_sub, :four_teacher, :four_sub, :five_teacher, :five_sub, :six_teacher, :six_sub, :seven_teacher, :seven_sub, :eight_teacher, :eight_sub) end end 

created form_for action "clas". need pass select option values params controller

clas.html.erb

<% form_for @classtimetable, :url => clas_timetables_path, :html => { :method => :post} |f| %> <div class="field">   <%= f.label "select class" %>   <% values = ["1c", "2c", "3c", "4d", "5i"] %>   <%= f.select :clas, options_for_select(values) %> </div> <div class="actions">   <%= f.submit "submit"%> </div> <% end %>  <% @classtimetable.each |class_timetable| %> <%= class_timetable.day %> <% end %> 

routes.rb

resources :timetables member   'clas' end end 

i need day class in clas.html.erb page. done selecting class dropdown , submit. value should passed in params when click submit. don't know how fix it. ideas?

add controller in form_for tag,

<% form_for @classtimetable, :url => { :controller => "your-controller-name", :action => :clas } |f| %> 

or can directly write this,

<% form_for @classtimetable, :url => clas_timetables_path, :html => { :method => :post} |f| %> 

change before_action like,

before_action :set_timetable, only: [:show, :edit, :update, :destroy, :clas] 

you change collection member , pass id

resources :timetables member   'clas' end end