diff options
Diffstat (limited to 'db')
| -rw-r--r-- | db/migrate/20101104182107_add_unique_index_on_members.rb | 20 |
1 files changed, 20 insertions, 0 deletions
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 |