gistfile1.rb

irb(main):003:0> SubscriptionPlan.first
  SubscriptionPlan Load (0.4ms)  SELECT  "subscription_plans".* FROM "subscription_plans"  ORDER BY "subscription_plans"."id" ASC LIMIT 1
=> nil
irb(main):004:0> SubscriptionPlan.create(amount: 1000, interval: "month", stripe_id: "test-plan", name: "Test Plan")
   (0.2ms)  begin transaction
  SubscriptionPlan Exists (0.3ms)  SELECT  1 AS one FROM "subscription_plans" WHERE "subscription_plans"."stripe_id" = 'test-plan' LIMIT 1
   (0.2ms)  rollback transaction
Stripe::InvalidRequestError: (Status 400) Plan already exists.