2017-01-31 17:13:45 +00:00
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# Copyright (C) 2012-2016 Zammad Foundation, http://zammad-foundation.org/
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2017-05-02 15:21:13 +00:00
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module ApplicationModel::CanLatestChange
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2017-01-31 17:13:45 +00:00
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extend ActiveSupport::Concern
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# methods defined here are going to extend the class, not the instance of it
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class_methods do
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=begin
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get latest updated_at object timestamp
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latest_change = Ticket.latest_change
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returns
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result = timestamp
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=end
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def latest_change
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key = "#{new.class.name}_latest_change"
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updated_at = Cache.get(key)
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2018-06-16 10:14:49 +00:00
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return updated_at if updated_at
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2017-01-31 17:13:45 +00:00
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# if we do not have it cached, do lookup
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2018-06-16 10:14:49 +00:00
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updated_at = order(updated_at: :desc, id: :desc).limit(1).pluck(:updated_at).first
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return if !updated_at
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2018-10-09 06:17:41 +00:00
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2018-06-16 10:14:49 +00:00
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latest_change_set(updated_at)
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2017-01-31 17:13:45 +00:00
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updated_at
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end
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def latest_change_set(updated_at)
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key = "#{new.class.name}_latest_change"
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2017-06-16 22:53:20 +00:00
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expires_in = 86_400 # 1 day
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2017-01-31 17:13:45 +00:00
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if updated_at.nil?
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Cache.delete(key)
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else
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Cache.write(key, updated_at, { expires_in: expires_in })
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end
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end
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end
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end
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