diff options
Diffstat (limited to 'db/migrate/20161206153753_remove_uniq_name_index_from_namespace.rb')
-rw-r--r-- | db/migrate/20161206153753_remove_uniq_name_index_from_namespace.rb | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/db/migrate/20161206153753_remove_uniq_name_index_from_namespace.rb b/db/migrate/20161206153753_remove_uniq_name_index_from_namespace.rb new file mode 100644 index 00000000000..cc9d4974baa --- /dev/null +++ b/db/migrate/20161206153753_remove_uniq_name_index_from_namespace.rb @@ -0,0 +1,36 @@ +# See http://doc.gitlab.com/ce/development/migration_style_guide.html +# for more information on how to write migrations for GitLab. + +class RemoveUniqNameIndexFromNamespace < ActiveRecord::Migration + include Gitlab::Database::MigrationHelpers + + disable_ddl_transaction! + + DOWNTIME = false + + def up + constraint_name = 'namespaces_name_key' + + transaction do + if index_exists?(:namespaces, :name) + remove_index(:namespaces, :name) + end + + # In some bizarre cases PostgreSQL might have a separate unique constraint + # that we'll need to drop. + if constraint_exists?(constraint_name) && Gitlab::Database.postgresql? + execute("ALTER TABLE namespaces DROP CONSTRAINT IF EXISTS #{constraint_name};") + end + end + end + + def down + unless index_exists?(:namespaces, :name) + add_concurrent_index(:namespaces, :name, unique: true) + end + end + + def constraint_exists?(name) + indexes(:namespaces).map(&:name).include?(name) + end +end |