1 files changed, 30 insertions, 0 deletions
diff --git a/app/models/resource_milestone_event.rb b/app/models/resource_milestone_event.rb
new file mode 100644
index 00000000000..ba43a1ee363
--- /dev/null
+++ b/app/models/resource_milestone_event.rb
@@ -0,0 +1,30 @@
+# frozen_string_literal: true
+
+class ResourceMilestoneEvent < ApplicationRecord
+  include Gitlab::Utils::StrongMemoize
+  include Importable
+  include ResourceEventTools
+
+  belongs_to :issue
+  belongs_to :merge_request
+  belongs_to :milestone
+
+  scope :by_issue, ->(issue) { where(issue_id: issue.id) }
+  scope :by_merge_request, ->(merge_request) { where(merge_request_id: merge_request.id) }
+
+  enum action: {
+         add: 1,
+         remove: 2
+       }
+
+  # state is used for issue and merge request states.
+  enum state: Issue.available_states.merge(MergeRequest.available_states)
+
+  def self.issuable_attrs
+    %i(issue merge_request).freeze
+  end
+
+  def resource
+    issue || merge_request
+  end
+end