mirror of
https://github.com/discourse/discourse.git
synced 2024-11-23 23:06:57 +08:00
30990006a9
This reduces chances of errors where consumers of strings mutate inputs and reduces memory usage of the app. Test suite passes now, but there may be some stuff left, so we will run a few sites on a branch prior to merging
39 lines
1010 B
Ruby
39 lines
1010 B
Ruby
# frozen_string_literal: true
|
|
|
|
module Positionable
|
|
extend ActiveSupport::Concern
|
|
|
|
included do
|
|
before_save do
|
|
self.position ||= self.class.count
|
|
end
|
|
end
|
|
|
|
def move_to(position_arg)
|
|
|
|
position = [[position_arg, 0].max, self.class.count - 1].min
|
|
|
|
if self.position.nil? || position > (self.position)
|
|
DB.exec "
|
|
UPDATE #{self.class.table_name}
|
|
SET position = position - 1
|
|
WHERE position > :current_position and position <= :new_position",
|
|
current_position: self.position, new_position: position
|
|
elsif position < self.position
|
|
DB.exec "
|
|
UPDATE #{self.class.table_name}
|
|
SET position = position + 1
|
|
WHERE position >= :new_position and position < :current_position",
|
|
current_position: self.position, new_position: position
|
|
else
|
|
# Not moving to a new position
|
|
return
|
|
end
|
|
|
|
DB.exec "
|
|
UPDATE #{self.class.table_name}
|
|
SET position = :position
|
|
WHERE id = :id", id: id, position: position
|
|
end
|
|
end
|