From c50b611f851303f97c83c8eb080f3c051c957395 Mon Sep 17 00:00:00 2001 From: Jean-Philippe Lang Date: Sat, 6 Nov 2010 11:44:38 +0000 Subject: [PATCH] Adds a unique index on members (#6826). git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@4369 e93f8b46-1217-0410-a6f0-8f06a7374b81 --- ...01104182107_add_unique_index_on_members.rb | 20 +++++++++++++++++++ 1 file changed, 20 insertions(+) create mode 100644 db/migrate/20101104182107_add_unique_index_on_members.rb diff --git a/db/migrate/20101104182107_add_unique_index_on_members.rb b/db/migrate/20101104182107_add_unique_index_on_members.rb new file mode 100644 index 000000000..6b07e4647 --- /dev/null +++ b/db/migrate/20101104182107_add_unique_index_on_members.rb @@ -0,0 +1,20 @@ +class AddUniqueIndexOnMembers < ActiveRecord::Migration + def self.up + # Reassign MemberRole rows if needed + MemberRole.update_all("member_id =" + + " (SELECT min(m2.id) FROM #{Member.table_name} m1, #{Member.table_name} m2" + + " WHERE m1.user_id = m2.user_id AND m1.project_id = m2.project_id" + + " AND m1.id = #{MemberRole.table_name}.member_id)") + # Remove duplicates + Member.connection.select_values("SELECT m.id FROM #{Member.table_name} m" + + " WHERE m.id > (SELECT min(m1.id) FROM #{Member.table_name} m1 WHERE m1.user_id = m.user_id AND m1.project_id = m.project_id)").each do |i| + Member.delete_all(["id = ?", i]) + end + + # Then add a unique index + add_index :members, [:user_id, :project_id], :unique => true + end + + def self.down + end +end