Ruby on Rails link_to With put Method
match '/admin/users/:id/activate' => 'admin#activate_user',
  :action => :activate_user, :via => :put

link_to 'Activate', :action => :activate_user, :id => user.id, :method => :put

put '/admin/users/:id/activate' => 'admins#activate_user', :as => 'activate_user'

link_to 'Activate', activate_user_path(user.id)

link_to 'Activate', {:action => :activate_user, :id => user.id}, :method => :put