annotate db/migrate/.svn/text-base/20101104182107_add_unique_index_on_members.rb.svn-base @ 904:0a8317a50fa0 redmine-1.1

Close obsolete branch redmine-1.1
author Chris Cannam
date Fri, 14 Jan 2011 12:53:21 +0000
parents af80e5618e9b
children
rev   line source
chris@37 1 class AddUniqueIndexOnMembers < ActiveRecord::Migration
chris@37 2 def self.up
chris@37 3 # Clean and reassign MemberRole rows if needed
chris@37 4 MemberRole.delete_all("member_id NOT IN (SELECT id FROM #{Member.table_name})")
chris@37 5 MemberRole.update_all("member_id =" +
chris@37 6 " (SELECT min(m2.id) FROM #{Member.table_name} m1, #{Member.table_name} m2" +
chris@37 7 " WHERE m1.user_id = m2.user_id AND m1.project_id = m2.project_id" +
chris@37 8 " AND m1.id = #{MemberRole.table_name}.member_id)")
chris@37 9 # Remove duplicates
chris@37 10 Member.connection.select_values("SELECT m.id FROM #{Member.table_name} m" +
chris@37 11 " 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|
chris@37 12 Member.delete_all(["id = ?", i])
chris@37 13 end
chris@37 14
chris@37 15 # Then add a unique index
chris@37 16 add_index :members, [:user_id, :project_id], :unique => true
chris@37 17 end
chris@37 18
chris@37 19 def self.down
Chris@117 20 remove_index :members, [:user_id, :project_id]
chris@37 21 end
chris@37 22 end