Call method after submitting form Rails - forms

Question

I have the following model:
class Coupon < ActiveRecord::Base
belongs_to :company
validates :description, presence: true, length: { maximum: 50 }, uniqueness: { case_sensitive: false }
validates :fine_print, presence: true
end
and the following method in the coupon controller:
def redeem
if params[:pin] == #coupon.company.pin
redirect_to root_path
else
flash.now[:notice] = "Incorrect Pin"
render :show
end
end
This form is in the a view:
<%= form_for( #coupon, :url => coupons_redeem_path( #coupon ), :html => { :method => :post } ) do |f| %>
<%= label_tag("pin", "Search for:") %>
<%= text_field_tag("pin") %>
<%= f.submit "Close Message" %>
<% end %>
I want the form to call the redeem method in the coupons controller when hitting submit but am getting this error:
No route matches [POST] "/coupons/redeem.1"
EDIT
These are my routes:
resources :companies do
resources :coupons
end
get 'coupons/redeem'

Answer 1

In your routes, coupons are nested resources of companies. So you should choose one of these alternatives:
1st:
resources :companies do
resources :coupons do
post :redeem, on: :member
end
end
This leads to helpers like this: redeem_company_coupon_path(company, coupon) (and send smth there via POST).
If you don't want to include company to your path, you could choose 2nd:
resources :companies do
resources :coupons
end
post 'coupons/:id/redeem', to: 'coupons#redeem', as: :redeem_coupon
After that you could use redeem_coupon_path(coupon) helper