add stripe_price_id to products, checkout session for specific product

app/controllers/checkout_controller.rb

@@ -6,9 +6,7 @@ def create
       customer: current_user.stripe_customer_id,
       payment_method_types: ['card'],
       line_items: [{
-        name: product.name,
-        amount: product.price,
-        currency: "usd",
+        price: product.stripe_price_id,
         quantity: 1
       }],
       mode: 'payment',

app/models/product.rb

@@ -9,7 +9,7 @@ def to_s
   after_create do
     product = Stripe::Product.create(name: name)
     price = Stripe::Price.create(product: product, unit_amount: self.price, currency: "usd")
-    update(stripe_product_id: product.id)
+    update(stripe_product_id: product.id, stripe_price_id: price.id)
   end
 
 end

app/views/products/index.html.erb

@@ -8,6 +8,7 @@
       <th>Name</th>
       <th>Price</th>
       <th>Stripe Product Id</th>
+      <th>Stripe Price Id</th>
       <th>PAYMENT</th>
       <th>Sales count</th>
       <th colspan="3"></th>
@@ -20,6 +21,7 @@
         <td><%= product.name %></td>
         <td><%= number_to_currency(product.price/100) %></td>
         <td><%= product.stripe_product_id %></td>
+        <td><%= product.stripe_price_id %></td>
         <td><%= button_to "Buy now!", checkout_create_path, params: {id: product.id}, remote: true %></td>
         <td><%= product.sales_count %></td>
         <td><%= link_to 'Show', product %></td>

db/migrate/20210309162937_add_stripe_price_id_to_products.rb

@@ -0,0 +1,5 @@
+class AddStripePriceIdToProducts < ActiveRecord::Migration[6.1]
+  def change
+    add_column :products, :stripe_price_id, :string
+  end
+end