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# frozen_string_literal: true
class AddUniqueConstraintForCustomEmailToServiceDeskSettings < Gitlab::Database::Migration[2.1]
disable_ddl_transaction!
INDEX_NAME = 'custom_email_unique_constraint'
def up
# Force custom_email to be unique instance-wide. This is neccessary because we will match
# incoming service desk emails with a custom email by the custom_email field.
# This also adds the corresponding index
add_concurrent_index(:service_desk_settings, :custom_email, unique: true, name: INDEX_NAME)
end
def down
remove_concurrent_index_by_name(:service_desk_settings, INDEX_NAME)
end
end
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