1 files changed, 34 insertions, 0 deletions
diff --git a/db/migrate/20180227182112_add_group_id_to_boards.rb b/db/migrate/20180227182112_add_group_id_to_boards.rb
new file mode 100644
index 00000000000..8e5460d44c9
--- /dev/null
+++ b/db/migrate/20180227182112_add_group_id_to_boards.rb
@@ -0,0 +1,34 @@
+class AddGroupIdToBoards < ActiveRecord::Migration
+  include Gitlab::Database::MigrationHelpers
+
+  disable_ddl_transaction!
+
+  DOWNTIME = false
+
+  def up
+    return if group_id_exists?
+
+    add_column :boards, :group_id, :integer
+    add_foreign_key :boards, :namespaces, column: :group_id, on_delete: :cascade
+    add_concurrent_index :boards, :group_id
+
+    change_column_null :boards, :project_id, true
+  end
+
+  def down
+    return unless group_id_exists?
+
+    remove_foreign_key :boards, column: :group_id
+    remove_index :boards, :group_id if index_exists? :boards, :group_id
+    remove_column :boards, :group_id
+
+    execute "DELETE from boards WHERE project_id IS NULL"
+    change_column_null :boards, :project_id, false
+  end
+
+  private
+
+  def group_id_exists?
+    column_exists?(:boards, :group_id)
+  end
+end