Get a list of Stripe customers whose email was changed on a specific day

stripe_customers_whose_email_changed.rb

# Author <mike@suitesync.io>

require 'stripe'

Stripe.api_key = 'sk_test_123'
Stripe.api_version = '2017-08-15'

target_date = 1500422400

events = []

Stripe::Event.list({
  limit: 100,
  type:'customer.updated',
  created: {
    gte: Time.at(target_date).to_datetime.utc.beginning_of_day.to_i,
    lte: Time.at(target_date).to_datetime.utc.end_of_day.to_i
  }
}).auto_paging_each { |e| events << e }

changed_customers = events.select { |e|
  !e.data.previous_attributes["email"].nil? &&
  e.data.previous_attributes["email"] != e.data.object.email
}

puts changed_customers.map { |e| "#{e.data.object.id}\t#{e.data.previous_attributes["email"]}\t#{e.data.object.email}" }
puts changed_customers.map { |e| e.data.object.id }.join("\n")