Expire the caches of the design repository before rename

ee/app/models/ee/project.rb

@@ -677,6 +677,17 @@ module EE
       end
     end
 
+    override(:expire_caches_before_rename)
+    def expire_caches_before_rename(old_path)
+      super
+
+      design = ::Repository.new("#{old_path}#{EE::Gitlab::GlRepository::DESIGN.path_suffix}", self)
+
+      if design.exists?
+        design.before_delete
+      end
+    end
+
     def alerts_service_available?
       feature_available?(:incident_management)
     end

ee/spec/models/project_spec.rb

@@ -2383,4 +2383,29 @@ describe Project do
   describe '#license_compliance' do
     it { expect(subject.license_compliance).to be_instance_of(::SCA::LicenseCompliance) }
   end
+
+  describe '#expire_caches_before_rename' do
+    let(:project) { create(:project, :repository) }
+    let(:repo)    { double(:repo, exists?: true, before_delete: true) }
+    let(:wiki)    { double(:wiki, exists?: true, before_delete: true) }
+    let(:design)  { double(:design, exists?: true) }
+
+    it 'expires the caches of the design repository' do
+      allow(Repository).to receive(:new)
+        .with('foo', project)
+        .and_return(repo)
+
+      allow(Repository).to receive(:new)
+        .with('foo.wiki', project)
+        .and_return(wiki)
+
+      allow(Repository).to receive(:new)
+        .with('foo.design', project)
+        .and_return(design)
+
+      expect(design).to receive(:before_delete)
+
+      project.expire_caches_before_rename('foo')
+    end
+  end
 end

spec/models/project_spec.rb

@@ -1793,6 +1793,7 @@ describe Project do
     let(:project) { create(:project, :repository) }
     let(:repo)    { double(:repo, exists?: true) }
     let(:wiki)    { double(:wiki, exists?: true) }
+    let(:design)  { double(:wiki, exists?: false) }
 
     it 'expires the caches of the repository and wiki' do
       allow(Repository).to receive(:new)
@@ -1803,6 +1804,10 @@ describe Project do
         .with('foo.wiki', project)
         .and_return(wiki)
 
+      allow(Repository).to receive(:new)
+        .with('foo.design', project)
+        .and_return(design)
+
       expect(repo).to receive(:before_delete)
       expect(wiki).to receive(:before_delete)