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educoder/db/migrate/20190518085626_add_index_to...

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class AddIndexToVerificatiojnCodes < ActiveRecord::Migration[5.2]
def change
add_index :verification_codes, [:phone], name: 'by_phone' if !index_exists?(:verification_codes, :phone)
add_index :verification_codes, [:email], name: 'by_email' if !index_exists?(:verification_codes, :email)
end
end