checkout.rb

def create
    @streamplay = Streamplay.find(params[:id])
    page_read = @streamplay.page_read
    price = page_read * 400
    session = Stripe::Checkout::Session.create(
      payment_method_types: ['card'],
      customer_email: current_user.email,
      line_items: [{
        name: 'Convert screenplay to audio',
        amount: price,
        currency: 'usd',
        quantity: 1,
      }],
      metadata: {
        page_read: page_read,
      },
      success_url: 'https://streamplayed.com/checkout/success?session_id={CHECKOUT_SESSION_ID}',
      cancel_url: 'https://streamplayed.com/checkout/cancel',
    )
    @session_id = session.id
    @streamplay.update(stripe_session: @session_id)
  end