Fix missing write of weight events for moved issues

Add spec

app/services/issuable/clone/attributes_rewriter.rb

@@ -18,6 +18,7 @@ module Issuable
         new_entity.update(update_attributes)
 
         copy_resource_label_events
+        copy_resource_weight_events
       end
 
       private
@@ -60,6 +61,20 @@ module Issuable
         end
       end
 
+      def copy_resource_weight_events
+        return unless original_entity.respond_to?(:resource_weight_events)
+
+        original_entity.resource_weight_events.find_in_batches do |batch|
+          events = batch.map do |event|
+            event.attributes
+              .except('id', 'reference', 'reference_html')
+              .merge('issue_id' => new_entity.id)
+          end
+
+          Gitlab::Database.bulk_insert(ResourceWeightEvent.table_name, events)
+        end
+      end
+
       def entity_key
         new_entity.class.name.parameterize('_').foreign_key
       end

ee/app/services/ee/issuable/common_system_notes_service.rb

@@ -11,7 +11,7 @@ module EE
         super
 
         ActiveRecord::Base.no_touching do
-          handle_weight_change
+          handle_weight_change(is_update)
           handle_date_change_note if is_update
         end
       end
@@ -28,11 +28,13 @@ module EE
         end
       end
 
-      def handle_weight_change
+      def handle_weight_change(is_update)
         return unless issuable.previous_changes.include?('weight')
 
         if weight_changes_tracking_enabled?
-          EE::ResourceEvents::ChangeWeightService.new([issuable], current_user, Time.now).execute
+          # Only create a resource event here if is_update is true to exclude the move issue operation.
+          # ResourceEvents for moved issues are written within AttributesRewriter.
+          EE::ResourceEvents::ChangeWeightService.new([issuable], current_user, Time.now).execute if is_update
         else
           ::SystemNoteService.change_weight_note(issuable, issuable.project, current_user)
         end

ee/spec/features/issues/move_issue_resource_weight_events_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+# Regression test for https://gitlab.com/gitlab-org/gitlab/merge_requests/22461
+describe 'Resource weight events', :js do
+  include Spec::Support::Helpers::Features::NotesHelpers
+
+  describe 'move issue by quick action' do
+    let(:user) { create(:user) }
+    let(:project) { create(:project, :public, :repository) }
+    let(:issue) { create(:issue, project: project, weight: nil, due_date: Date.new(2016, 8, 28)) }
+
+    before do
+      project.add_maintainer(user)
+      sign_in(user)
+      visit project_issue_path(project, issue)
+      wait_for_all_requests
+    end
+
+    after do
+      wait_for_requests
+    end
+
+    context 'when original issue has weight events' do
+      let(:target_project) { create(:project, :public) }
+
+      before do
+        target_project.add_maintainer(user)
+
+        add_note("/weight 2")
+        wait_for_requests
+
+        add_note("/weight 3\n/move #{target_project.full_path}")
+      end
+
+      it "creates expected weight events on the moved issue" do
+        expect(page).to have_content "Moved this issue to #{target_project.full_path}."
+        expect(issue.reload).to be_closed
+
+        visit project_issue_path(target_project, issue)
+        wait_for_all_requests
+
+        expect(page).to have_content 'changed weight to 2'
+        expect(page).to have_content 'changed weight to 3'
+
+        visit project_issue_path(project, issue)
+        wait_for_all_requests
+
+        expect(page).to have_content 'changed weight to 2'
+        expect(page).to have_content 'changed weight to 3'
+        expect(page).to have_content 'Closed'
+      end
+    end
+  end
+end

ee/spec/services/ee/issuable/common_system_notes_service_spec.rb

@@ -62,13 +62,8 @@ describe Issuable::CommonSystemNotesService do
         stub_feature_flags(track_issue_weight_change_events: true)
       end
 
-      it 'creates a resource weight event' do
-        subject
-
-        event = issuable.resource_weight_events.last
-
-        expect(event.weight).to eq(5)
-        expect(event.user_id).to eq(user.id)
+      it 'does not create a resource weight event' do
+        expect { subject }.not_to change { ResourceWeightEvent.count }
       end
 
       it 'does not create a system note' do

ee/spec/services/ee/issues/move_service_spec.rb

@@ -28,6 +28,21 @@ describe Issues::MoveService do
           .not_to raise_error # Sidekiq::Worker::EnqueueFromTransactionError
       end
     end
+
+    context 'resource weight events' do
+      let!(:event1) { create(:resource_weight_event, issue: old_issue, weight: 1) }
+      let!(:event2) { create(:resource_weight_event, issue: old_issue, weight: 42) }
+      let!(:event3) { create(:resource_weight_event, issue: old_issue, weight: 5) }
+
+      let!(:another_old_issue) { create(:issue, project: new_project, author: user) }
+      let!(:event4) { create(:resource_weight_event, issue: another_old_issue, weight: 2) }
+
+      it 'creates expected resource weight events' do
+        new_issue = move_service.execute(old_issue, new_project)
+
+        expect(new_issue.resource_weight_events.map(&:weight)).to contain_exactly(1, 42, 5)
+      end
+    end
   end
 
   describe '#rewrite_related_issues' do