demarches-normaliennes/db/migrate/20170215102943_remove_duplicate_email_received.rb

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2017-02-15 15:26:24 +01:00
class RemoveDuplicateEmailReceived < ActiveRecord::Migration[5.0]
def change
all_mails = MailReceived.all
groupped = all_mails.group_by { |m| m.procedure_id }
filtered = groupped.reject { |k, v| v.length < 2 }
filtered.each do |k, duplicate_mails|
duplicate_mails.pop
duplicate_mails.each(&:destroy)
end
end
end