34 lines
1.4 KiB
Ruby
34 lines
1.4 KiB
Ruby
# rubocop:disable RemoveIndex
|
|
class AddUniqueIndexToLabels < ActiveRecord::Migration[4.2]
|
|
include Gitlab::Database::MigrationHelpers
|
|
|
|
DOWNTIME = true
|
|
DOWNTIME_REASON = 'This migration removes duplicated labels.'
|
|
|
|
disable_ddl_transaction!
|
|
|
|
def up
|
|
select_all('SELECT title, project_id, COUNT(id) as cnt FROM labels GROUP BY project_id, title HAVING COUNT(id) > 1').each do |label|
|
|
label_title = quote_string(label['title'])
|
|
duplicated_ids = select_all("SELECT id FROM labels WHERE project_id = #{label['project_id']} AND title = '#{label_title}' ORDER BY id ASC").map { |label| label['id'] }
|
|
label_id = duplicated_ids.first
|
|
duplicated_ids.delete(label_id)
|
|
|
|
execute("UPDATE label_links SET label_id = #{label_id} WHERE label_id IN(#{duplicated_ids.join(",")})")
|
|
execute("DELETE FROM labels WHERE id IN(#{duplicated_ids.join(",")})")
|
|
end
|
|
|
|
remove_index :labels, column: :project_id if index_exists?(:labels, :project_id)
|
|
remove_index :labels, column: :title if index_exists?(:labels, :title)
|
|
|
|
add_concurrent_index :labels, [:group_id, :project_id, :title], unique: true
|
|
end
|
|
|
|
def down
|
|
remove_index :labels, column: [:group_id, :project_id, :title] if index_exists?(:labels, [:group_id, :project_id, :title], unique: true)
|
|
|
|
add_concurrent_index :labels, :project_id
|
|
add_concurrent_index :labels, :title
|
|
end
|
|
end
|