Button_to patch method is unexpectedly working - ruby-on-rails

Question

I was struggling the whole day to make my button_to working. This is the code in my order index view:
<%= button_to("Remove", {:controller => "orders", :action => "update", :id => product.id}, :method => :patch) %>
my controller :
def update
#order.products.delete(Product.find(#product.id))
#product.ordinable = true
#product.save
#order.amount = 0
#order.save
#order_amountnew = #order.amount
#order.products.each do |x|
#order_amountnew = #order_amountnew + x.price
end
#order.amount = #order_amountnew
#order.save
if #order.products.empty?
#order.destroy
end
redirect_to orders_url
end
and my routes:
Rails.application.routes.draw do
root to: 'pages#home'
devise_for :users
resources :products
resources :orders, only: [:show, :create, :index, :destroy, :update]
post '/payment', action: :payorder, controller: 'orders'
patch '/orders', action: :update, controller: 'orders'
require "sidekiq/web"
authenticate :user, lambda { |u| u.admin } do
mount Sidekiq::Web => '/sidekiq'
end
end
I was trying to trigger the code inside the update method using the button_helper inside my order index. I come up with this solution and unexpectedly my button_to method now trigger the update method, but only after i spent hours googling and added to my routes this line of code:
patch '/orders', action: :update, controller: 'orders'
My question is now, whenever i want to trigger a method with a link_to or a button_to, i must create a route for each method like that right? Otherwise, i get routing error right? I have this doubt because here:
resources :orders, only: [:show, :create, :index, :destroy, :update]
i already defined an update route for my orders resource, so i don't understand why i need to specify again the route for the crud method i want to use. Thank you.

Answer 1

resources :orders, only: [:show, :create, :index, :destroy, :update] will yield update url as /orders/:id. You can verify that by poking in rake routes output.
patch '/orders', action: :update, controller: 'orders' yields update url as /orders.
The reason why latter works is because <%= button_to("Remove", {:controller => "orders", :action => "update", :id => product.id}, :method => :patch) %> send a request to /orders?id=.... You can verify that in the stacktrace
If you want to use 1, you should change button_to to format like <%= button_to("Remove", product_path(product), :method => :patch) %>. See https://api.rubyonrails.org/v5.2.1/classes/ActionView/Helpers/UrlHelper.html#method-i-button_to for references.
Hope that helps :).