Button to buy a product
Redirects to Stripe Checkout page
generate scaffold:
rails g scaffold product name price:integer description:text --no-helper --no-assets --no-controller-specs --no-view-specs --no-test-framework --no-jbuilder
EDITOR=vim rails credentials:edit
credentials.yml structure:
stripe:
public: YOUR_CODE
secret: YOUR_CODE
webhook: YOUR_CODE
- create stripe customer when creating a user
after_create do
customer = Stripe::Customer.create(
email: email,
)
update(stripe_customer_id: customer.id)
end
- associate checkout to current user / customer
customer: 'cus_123',
- add stripe_product_id to product
stripe_product = Stripe::Product.create(name: "iphone 14")
stripe_price = Stripe::Price.create(currency: "usd", product: stripe_product, unit_amount: 77700, lookup_key: "iphone 14")
product = Product.create(name: stripe_product.name, price: stripe_price.unit_amount, stripe_product_id: stripe_product.id)
- and update webhook to find current product correctly
Stripe::Checkout::Session.retrieve({ id: session.id, expand: ["line_items"]})
view
<% @prices = Stripe::Price.list(lookup_keys: ['iphone 14', 'iphone 15'], expand: ['data.product']).data.sort_by {|p| p.unit_amount} %>
<% @prices.each do |price| %>
<br>
<%= price.product.name %>
<%= button_to checkout_create_path(price: price.id), remote: true, data: { disable_with: "Connecting..." } do %>
Buy now
<%= price.unit_amount/100 %>
<%= price.currency %>
<% end %>
<% end %>
controller
@session = Stripe::Checkout::Session.create({
payment_method_types: ['card'],
line_items: [{
price: params[:price],
quantity: 1
}],
mode: 'payment',
success_url: root_url,
cancel_url: root_url,
})
controller
success_url: root_url + '?session_id={CHECKOUT_SESSION_ID}',
view
<% if params[:session_id].present? %>
<% @session = Stripe::Checkout::Session.retrieve(params[:session_id]) %>
<% @payment_intent = Stripe::PaymentIntent.retrieve(@session.payment_intent) %>
Payement amount:
<%= number_to_currency @payment_intent.amount_received / 100.0 %>.</p>
Payment status:
<%= @payment_intent.status %>
<br>
<%= debug @session %>
<%= debug @payment_intent %>
<% end %>
when "checkout.session.completed"
session = event.data.object
user = User.find_by(stripe_customer_id: session.customer)
checkout_with_items = Stripe::Checkout.Session.retrieve({id: session.id, expand: ["line_items"]})
checkout_with_items.line_items.data.each do |line_item|
product = Product.find_by(stripe_product_id: line_item.price.product)
user.user_products.create(product: product, price: line_item.price.unit_amount)
product.increment!(:sales_count)
end
products/index inside table
<% if @cart.include?(product) %>
<%= button_to "Remove from cart", remove_from_cart_path(product), method: :delete %>
<% else %>
<%= button_to "Add to cart", add_to_cart_path(product) %>
<% end %>
routes
post "products/add_to_cart/:id", to: "products#add_to_cart", as: "add_to_cart"
delete "products/remove_from_cart/:id", to: "products#remove_from_cart", as: "remove_from_cart"
products_controller.rb
def add_to_cart
id = params[:id].to_i
session[:cart] << id unless session[:cart].include?(id)
redirect_to products_path
end
def remove_from_cart
id = params[:id].to_i
session[:cart].delete(id)
redirect_to products_path
end
application_controller
before_action :initialize_session
before_action :load_cart
private
def initialize_session
session[:cart] ||= [] # empty cart = empty array
end
def load_cart
@cart = Product.find(session[:cart])
end
application.html.erb
<h1>Shopping cart</h1>
Items:
<%= @cart.size %>
<br>
<% @cart.each do |cart_item| %>
<br>
<%= cart_item.name %>
<%= link_to "x", remove_from_cart_path(cart_item), method: :delete %>
<% end %>
product.rb
def to_builder
Jbuilder.new do |product|
product.price stripe_price_id
product.quantity 1
end
end
checkout_controller
@cart.collect { |item| item.to_builder.attributes! },