openproject/db/migrate/20120828171423_make_groups_...

class MakeGroupsUsersAModel < ActiveRecord::Migration
  def self.up
    remove_index :groups_users, :name => :groups_users_ids
    rename_table :groups_users, :group_users
    add_index :group_users, [:group_id, :user_id], :name => :group_user_ids, :unique => true
  end

  def self.down
    remove_index :group_users, :name => :group_user_ids
    rename_table :group_users, :groups_users
    add_index :groups_users, [:group_id, :user_id], :name => :groups_users_ids, :unique => true
  end
end
DEPRECATION FIX: make a badly named GroupUser model to acts as the join model for a has_many :through between groups and users. this replaces a has_and_belongs_to_many association, that contained additional parameters like :after_add and :after_destroy. these additional parameters aren't supported for habtm beginning with rails 3.1.0 12 years ago			`class MakeGroupsUsersAModel < ActiveRecord::Migration`
			`def self.up`
			`remove_index :groups_users, :name => :groups_users_ids`
			`rename_table :groups_users, :group_users`
			`add_index :group_users, [:group_id, :user_id], :name => :group_user_ids, :unique => true`
			`end`

			`def self.down`
			`remove_index :group_users, :name => :group_user_ids`
			`rename_table :group_users, :groups_users`
			`add_index :groups_users, [:group_id, :user_id], :name => :groups_users_ids, :unique => true`
			`end`
			`end`