1 files changed, 20 insertions, 0 deletions
diff --git a/db/migrate/20200527170649_create_alert_management_alert_user_mentions.rb b/db/migrate/20200527170649_create_alert_management_alert_user_mentions.rb
new file mode 100644
index 00000000000..15e4ab2a357
--- /dev/null
+++ b/db/migrate/20200527170649_create_alert_management_alert_user_mentions.rb
@@ -0,0 +1,20 @@
+# frozen_string_literal: true
+
+class CreateAlertManagementAlertUserMentions < ActiveRecord::Migration[6.0]
+  DOWNTIME = false
+
+  def change
+    create_table :alert_management_alert_user_mentions do |t|
+      t.references :alert_management_alert, type: :bigint, index: false, null: false, foreign_key: { on_delete: :cascade }
+      t.bigint :note_id, null: true
+
+      t.integer    :mentioned_users_ids, array: true
+      t.integer    :mentioned_projects_ids, array: true
+      t.integer    :mentioned_groups_ids, array: true
+    end
+
+    add_index :alert_management_alert_user_mentions, [:note_id], where: 'note_id IS NOT NULL', unique: true, name: 'index_alert_user_mentions_on_note_id'
+    add_index :alert_management_alert_user_mentions, [:alert_management_alert_id], where: 'note_id IS NULL', unique: true, name: 'index_alert_user_mentions_on_alert_id'
+    add_index :alert_management_alert_user_mentions, [:alert_management_alert_id, :note_id], unique: true, name: 'index_alert_user_mentions_on_alert_id_and_note_id'
+  end
+end