2016-06-09 12:39:16 +00:00
|
|
|
# rubocop:disable all
|
2018-11-13 07:27:31 +00:00
|
|
|
class RemoveDuplicateTags < ActiveRecord::Migration[4.2]
|
2015-05-07 15:17:58 +00:00
|
|
|
def up
|
|
|
|
select_all("SELECT name, COUNT(id) as cnt FROM tags GROUP BY name HAVING COUNT(id) > 1").each do |tag|
|
2015-05-08 13:54:45 +00:00
|
|
|
tag_name = quote_string(tag["name"])
|
|
|
|
duplicate_ids = select_all("SELECT id FROM tags WHERE name = '#{tag_name}'").map{|tag| tag["id"]}
|
2015-05-07 15:17:58 +00:00
|
|
|
origin_tag_id = duplicate_ids.first
|
|
|
|
duplicate_ids.delete origin_tag_id
|
|
|
|
|
|
|
|
execute("UPDATE taggings SET tag_id = #{origin_tag_id} WHERE tag_id IN(#{duplicate_ids.join(",")})")
|
|
|
|
execute("DELETE FROM tags WHERE id IN(#{duplicate_ids.join(",")})")
|
|
|
|
end
|
|
|
|
end
|
|
|
|
|
|
|
|
def down
|
|
|
|
|
|
|
|
end
|
|
|
|
end
|