1 files changed, 33 insertions, 0 deletions
diff --git a/app/models/metrics/dashboard/annotation.rb b/app/models/metrics/dashboard/annotation.rb
new file mode 100644
index 00000000000..2f1b6527742
--- /dev/null
+++ b/app/models/metrics/dashboard/annotation.rb
@@ -0,0 +1,33 @@
+# frozen_string_literal: true
+
+module Metrics
+  module Dashboard
+    class Annotation < ApplicationRecord
+      self.table_name = 'metrics_dashboard_annotations'
+
+      belongs_to :environment, inverse_of: :metrics_dashboard_annotations
+      belongs_to :cluster, class_name: 'Clusters::Cluster', inverse_of: :metrics_dashboard_annotations
+
+      validates :starting_at, presence: true
+      validates :description, presence: true, length: { maximum: 255 }
+      validates :dashboard_path, presence: true, length: { maximum: 255 }
+      validates :panel_xid, length: { maximum: 255 }
+      validate :single_ownership
+      validate :orphaned_annotation
+
+      private
+
+      def single_ownership
+        return if cluster.nil? ^ environment.nil?
+
+        errors.add(:base, s_("Metrics::Dashboard::Annotation|Annotation can't belong to both a cluster and an environment at the same time"))
+      end
+
+      def orphaned_annotation
+        return if cluster.present? || environment.present?
+
+        errors.add(:base, s_("Metrics::Dashboard::Annotation|Annotation must belong to a cluster or an environment"))
+      end
+    end
+  end
+end