Rails routing error, because of controller def -

i'm rails beginner , created def set_star in controller, change attribute onclick.

class ebmscontroller < applicationcontroller   def index     @ebms = ebm.all   end    def destroy     @ebm = ebm.find(params[:id])     @ebm.destroy     redirect_to categories_path   end    def create     @ebm = ebm.new(params[:ebm])     @ebm.save     redirect_to categories_path   end    def set_star     @ebm = ebm.find(params[:id])     @ebm.write_attribute(:star, '1')     redirect_to categories_path   end end 

the button looks this:

<% ebm in @ebms %>   <tr>     <td><%= ebm.number %></td>         <td><%= ebm.text %></td>     <td><%= ebm.content %></td>     <td><%= ebm.star %></td>     <td><%= link_to 'star', ebm, :method => :set_star, data: { confirm: 'are sure?' } %></td>   </tr> <% end %> 

but somehow wont work, when click button routing error:

 no route matches [post] "/ebms/1" 

in routes, defined:

 resources :ebms 

so, dont know did wrong! thanks.

in routes.rb add line

put 'ebms/:id/star', to: 'ebms#set_star', as: 'set_star' 

then change link_to follows

<%= link_to 'star', set_star_path(ebm), method: :put, confirm: 'are sure?' %> 

as mattherick pointed out, change controller @ebm.update_attribute(:star, '1')