mirror of
https://github.com/scinote-eln/scinote-web.git
synced 2024-11-18 23:21:30 +08:00
17 lines
461 B
Ruby
17 lines
461 B
Ruby
|
# frozen_string_literal: true
|
||
|
|
|
||
|
|
class AddUniqueIndexOnUserTeams < ActiveRecord::Migration[5.1]
|
||
|
|
def up
|
||
|
|
# firstly delete the duplicates
|
||
|
|
execute 'WITH uniq AS
|
||
|
|
(SELECT DISTINCT ON (user_id, team_id) * FROM user_teams)
|
||
|
|
DELETE FROM user_teams WHERE user_teams.id NOT IN
|
||
|
|
(SELECT id FROM uniq)'
|
||
|
|
add_index :user_teams, %i(user_id team_id), unique: true
|
||
|
|
end
|
||
|
|
|
||
|
|
def down
|
||
|
|
remove_index :user_teams, column: %i(user_id team_id)
|
||
|
|
end
|
||
|
|
end
|