44 lines
1.1 KiB
Ruby
44 lines
1.1 KiB
Ruby
class DraftSequence < ActiveRecord::Base
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def self.next!(user, key)
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user_id = user
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user_id = user.id unless user.is_a?(Integer)
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return 0 if user_id < 0
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h = { user_id: user_id, draft_key: key }
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c = DraftSequence.find_by(h)
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c ||= DraftSequence.new(h)
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c.sequence ||= 0
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c.sequence += 1
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c.save
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exec_sql("DELETE FROM drafts WHERE user_id = :user_id AND draft_key = :draft_key AND sequence < :sequence", draft_key: key, user_id: user_id, sequence: c.sequence)
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c.sequence
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end
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def self.current(user, key)
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return nil unless user
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user_id = user
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user_id = user.id unless user.is_a?(Integer)
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# perf critical path
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r = exec_sql('select sequence from draft_sequences where user_id = ? and draft_key = ?', user_id, key).values
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r.length.zero? ? 0 : r[0][0].to_i
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end
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end
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# == Schema Information
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#
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# Table name: draft_sequences
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#
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# id :integer not null, primary key
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# user_id :integer not null
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# draft_key :string not null
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# sequence :integer not null
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#
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# Indexes
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#
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# index_draft_sequences_on_user_id_and_draft_key (user_id,draft_key) UNIQUE
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#
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