Changes MembersController to use RepositoryObject.

closes #4995

app/controllers/members_controller.rb

@@ -4,6 +4,6 @@
 class MembersController < ApplicationController
   # Return the members of this collection
   def index
-    @members = Dro.members_of_collection(params[:object_id]).select(:external_identifier, :version)
+    @members = RepositoryObject.currently_members_of_collection(params[:object_id]).select(:external_identifier, :version)
   end
 end

spec/requests/members_for_collection_spec.rb

@@ -4,20 +4,24 @@
 
 RSpec.describe 'Get the members' do
   let(:collection_druid) { 'druid:mk420bs7601' }
-
-  let!(:dro) { create(:ar_dro, isMemberOf: [collection_druid]) }
-
   let(:expected) do
     {
       members: [
         {
-          externalIdentifier: dro.external_identifier,
-          version: dro.version
+          externalIdentifier: repository_object.external_identifier,
+          version: repository_object.head_version.version
         }
       ]
     }
   end
 
+  let(:repository_object) { create(:repository_object) }
+
+  before do
+    repository_object_version = create(:repository_object_version, version: 2, is_member_of: [collection_druid], repository_object:)
+    repository_object.update!(head_version: repository_object_version, opened_version: repository_object_version)
+  end
+
   it 'returns the druids' do
     get "/v1/objects/#{collection_druid}/members",
         headers: { 'Authorization' => "Bearer #{jwt}" }