Question

I’m trying to post to my registration controller using a link_to link.

I have <%= link_to "Register for Period", registration_path(period_id: period.id), :method => :post %>

Which generates a link like: http://localhost:3000/registrations/6?period_id=25 where the 6 is the event_id. I need to save the period_id and the user_id to the registration database.

I get the following error in the browser: No route matches [POST] "/registrations/6"

What am I doing wrong?

routes:

Mavens::Application.routes.draw do

  devise_for :users

  resources :events
  resources :periods
  resources :products
  resources :cart_rows
  resources :product_requests
  resources :inqueries
  resources :registrations
   match '/profile',  to: 'static_pages#profile'

  root :to => 'static_pages#home'

  get "static_pages/home"
  get "static_pages/about"
end

Answer 1

If you put in your routes.rb:

resources :registrations do
  member do
    post :save_period
  end
end

And in your link:

<%= link_to "Register for period", 
  save_period_registration_path(id: @registration.id, period_id: period.id), :method => :post %>

You will have a route that matches your resquest.
When you only have a resources :registrations rule on your routes.rb, only the default restful routes are created, and there is no POST to a single resource created by default.
I believe you will have to read something about the CSRF token, because if you have a protect_from_forgery on your application_controller, probably this POST request from a single link would not work.