How to check if a Stripe Error exists / puts a Stripe Error if it exists

Question

In my Rails applications, I am trying to only run a Stripe Charge command IF a Stripe Error does not exist. And I want to be able to inspect the Stripe Error.

charge = Stripe::Charge.create(
  :amount => amount_in_cents,
  :customer => stripe_customer,
  :description => "my application",
)

Should be something like:

unless Stripe.errors.exists? do
   charge = Stripe::Charge.create(
      :amount => amount_in_cents,
      :customer => stripe_customer,
      :description => "my application",
   )
end

And to be confident my code is working, I am trying to puts the Stripe Error, if it exists. Is the Stripe Error an object that I can puts ?

Such as:

if Stripe.error.exists?
    puts Stripe.error
end

Trying to see the output with puts commands in my model, as well as in my testing file like so:

To intentionally create an error:

StripeMock.prepare_card_error(:card_declined)

Me trying to puts this (but none of the below works):

puts "Stripe Card Error: #{Stripe::CardError}"

begin
  rescue Stripe::CardError => e
  body = e.json_body
  err  = body[:error]
  puts err.exists?
  puts err
end

puts err.exists?
puts err

When I try something like:

error = Stripe::CardError
if error
  rescue Stripe::CardError => e
end

it is not valid, and neither are if Stripe.error or if Stripe::CardError or if Stripe::CardError.exists? .

There must be some Stripe Error object that we can apply logic to?!?

Any help on puts ing / inspecting the Stripe Error would be appreciated, thank you.

Answer 1

Building off the comments on the original question: you want to catch the exception thrown by Stripe::charge.create() .

begin
  puts "About to create charge"
  charge = Stripe::Charge.create(
    :amount => amount_in_cents,
    :customer => stripe_customer,
    :description => "my application",
  )
  # The next line only runs if Charge.create() did not raise an exception

  puts "Created charge #{charge.id}"
  MyDatabase.insert(charge.id)

rescue Stripe::CardError => e
  # An error was thrown, so execution of the begin block did not complete
  puts e
end

Here's a brief tutorial on exception handling in Ruby .