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Rails5でクレジットカード決済サービス pay.jpのgemを使ってみた(定期課金)

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サンプル: https://github.com/eccentricyan/payjp-ruby-sample
間違いがありましたら、ご指摘ください。mm
https://gyazo.com/eaebb328e473f2cf453f3c232455b2ca

sampleコードについて

支払いボタンの表示, userにcustomer_id(顧客ID)がある場合、再度支払い情報を入力しない

app/views/items/show.html.erb
<%= form_for(Order.new, url: item_orders_path(@item)) do |f| %>
    <% if @user.customer_id %>
    <%= f.submit "購読する" %>
    <% else %>
    <script src="https://checkout.pay.jp/" class="payjp-button" data-key="pk_test_0383a1b8f91e8a6e3ea0e2a9"></script>
    <% end %>
<% end %>

顧客情報取得

app/controllers/orders_controller.rb
if customer_id = @user.customer_id
  customer = Payjp::Customer.retrieve(id: customer_id)
else
  customer = Payjp::Customer.create(card:payjp_token)
  @user.customer_id = customer.id
  @user.save!
end

プラン情報取得(プランIDはアイテムIDと購読期間(毎月month、毎年yearなど)で作成)

plans = customer.subscriptions.data.collect(&:plan).collect(&:id)
plan_id = "#{@item.id}_#{@item.interval}"
if plans.include?(plan_id)
  plan = Payjp::Plan.retrieve(id: "#{@item.id}_#{@item.interval}")
else
  plan = Payjp::Plan.create(id: "#{@item.id}_#{@item.interval}", amount: "#{@item.price}", interval: "#{@item.interval}", currency: "jpy")
end

定期課金

subscription = Payjp::Subscription.create(customer:customer.id, plan: plan.id)

ユーザー情報更新

update_role(subscription)
def update_role(subscription)
  if subscription.status == "active"
    @user.role << "#{@item.interval}_subscribed"
    @user.role = @user.role.uniq
    @user.save!
  else
    @user.role.delete("#{@item.interval}_subscribed")
    @user.save!
  end
end

ユーザー情報更新rake(whenever gem で毎日実行する)

lib/admin.rake
namespace :admin do
  desc 'refresh user admin'
  task :refresh => :environment do
    Order.gt(current_period_end: Time.now).each do |order|
      subscription = Payjp::Subscription.retrieve(id: order.subscription)
      if subscription.status == "active"
        order.current_period_end = Time.at(subscription.current_period_end)
        order.save!
      else
        user = order.user
        user.role.delete("#{order.item.id}_#{order.item.interval}")
        user.save!
      end
    end
  end
end

参考:
https://pay.jp/docs/api/#subscription-定期課金
http://blog.pay.jp/entry/2016/11/14/181023
https://github.com/payjp/payjp-ruby

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