discourse/db/migrate/20190418113814_add_unique_index_to_group_requests.rb

# frozen_string_literal: true

class AddUniqueIndexToGroupRequests < ActiveRecord::Migration[5.2]
  def change
    execute "DELETE FROM group_requests WHERE id NOT IN (SELECT MIN(id) FROM group_requests GROUP BY group_id, user_id)"
    add_index :group_requests, %i[group_id user_id], unique: true
  end
end
DEV: enable frozen string literal on all files 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 2019-05-03 08:17:27 +10:00			`# frozen_string_literal: true`

FIX: Add unique index on group_requests(group_id, user_id). (#7399) 2019-04-23 05:51:30 +03:00			`class AddUniqueIndexToGroupRequests < ActiveRecord::Migration[5.2]`
			`def change`
			`execute "DELETE FROM group_requests WHERE id NOT IN (SELECT MIN(id) FROM group_requests GROUP BY group_id, user_id)"`
			`add_index :group_requests, %i[group_id user_id], unique: true`
			`end`
			`end`