mirror of
https://github.com/discourse/discourse.git
synced 2024-11-24 06:15:28 +08:00
56 lines
1.5 KiB
Ruby
56 lines
1.5 KiB
Ruby
# frozen_string_literal: true
|
|
|
|
class DraftSequence < ActiveRecord::Base
|
|
def self.next!(user, key)
|
|
return nil if !user
|
|
|
|
user_id = user
|
|
user_id = user.id unless user.is_a?(Integer)
|
|
|
|
return 0 if !User.human_user_id?(user_id)
|
|
|
|
sequence =
|
|
DB.query_single(<<~SQL, user_id: user_id, draft_key: key).first
|
|
INSERT INTO draft_sequences (user_id, draft_key, sequence)
|
|
VALUES (:user_id, :draft_key, 1)
|
|
ON CONFLICT (user_id, draft_key) DO
|
|
UPDATE
|
|
SET sequence = draft_sequences.sequence + 1
|
|
WHERE draft_sequences.user_id = :user_id
|
|
AND draft_sequences.draft_key = :draft_key
|
|
RETURNING sequence
|
|
SQL
|
|
|
|
DB.exec("DELETE FROM drafts WHERE user_id = :user_id AND draft_key = :draft_key AND sequence < :sequence", draft_key: key, user_id: user_id, sequence: sequence)
|
|
|
|
sequence
|
|
end
|
|
|
|
def self.current(user, key)
|
|
return nil if !user
|
|
|
|
user_id = user
|
|
user_id = user.id unless user.is_a?(Integer)
|
|
|
|
return 0 if !User.human_user_id?(user_id)
|
|
|
|
# perf critical path
|
|
r, _ = DB.query_single('select sequence from draft_sequences where user_id = ? and draft_key = ?', user_id, key)
|
|
r.to_i
|
|
end
|
|
end
|
|
|
|
# == Schema Information
|
|
#
|
|
# Table name: draft_sequences
|
|
#
|
|
# id :integer not null, primary key
|
|
# user_id :integer not null
|
|
# draft_key :string not null
|
|
# sequence :bigint not null
|
|
#
|
|
# Indexes
|
|
#
|
|
# index_draft_sequences_on_user_id_and_draft_key (user_id,draft_key) UNIQUE
|
|
#
|