1 files changed, 31 insertions, 0 deletions
diff --git a/db/migrate/20200305020458_add_label_restore_table.rb b/db/migrate/20200305020458_add_label_restore_table.rb
new file mode 100644
index 00000000000..a5809cfe14b
--- /dev/null
+++ b/db/migrate/20200305020458_add_label_restore_table.rb
@@ -0,0 +1,31 @@
+# frozen_string_literal: true
+
+class AddLabelRestoreTable < ActiveRecord::Migration[6.0]
+  DOWNTIME = false
+
+  def up
+    # copy table
+    execute "CREATE TABLE #{backup_labels_table_name} (LIKE #{labels_table_name} INCLUDING ALL);"
+
+    # make the primary key a real functioning one rather than incremental
+    execute "ALTER TABLE #{backup_labels_table_name} ALTER COLUMN ID DROP DEFAULT;"
+
+    # add some fields that make changes trackable
+    execute "ALTER TABLE #{backup_labels_table_name} ADD COLUMN restore_action INTEGER;"
+    execute "ALTER TABLE #{backup_labels_table_name} ADD COLUMN new_title VARCHAR;"
+  end
+
+  def down
+    drop_table backup_labels_table_name
+  end
+
+  private
+
+  def labels_table_name
+    :labels
+  end
+
+  def backup_labels_table_name
+    :backup_labels
+  end
+end