Jorge Manrubia
27 lines
567 B
Ruby
27 lines
567 B
Ruby
# Provides sequential IDs for +external_account_id+ when creating accounts without one.
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class Account::ExternalIdSequence < ApplicationRecord
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class << self
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def next
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with_lock do |sequence|
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sequence.increment!(:value).value
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end
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end
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def value
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first&.value
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end
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private
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def with_lock
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transaction do
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sequence = lock.first_or_create!(value: initial_value)
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yield sequence
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end
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end
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def initial_value
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Account.maximum(:external_account_id) || 0
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end
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end
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end
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