Use ActionView url_helpers in MembershipHelper

app/helpers/hyrax/hyrax_helper_behavior.rb

@@ -360,5 +360,10 @@ def search_state_with_facets(params, facet = {})
     def institution
       Institution
     end
+
+    # ActionView url helpers
+    def url_helpers
+      Rails.application.routes.url_helpers
+    end
   end
 end

app/helpers/hyrax/membership_helper.rb

@@ -41,7 +41,7 @@ def work_members_json(resource)
       Hyrax.custom_queries.find_child_works(resource: resource).map do |member|
         { id: member.id.to_s,
           label: member.title.first,
-          path: url_for(member) }
+          path: url_helpers.url_for([member, { only_path: true }]) }
       end.to_json
     end
   end

spec/features/edit_work_spec.rb

@@ -78,4 +78,17 @@
       expect(page).to have_selector('#new_group_name_skel', text: 'librarians admin donor')
     end
   end
+
+  context 'with a parent Valkyrie resource' do
+    let(:monograph) { FactoryBot.valkyrie_create(:monograph, :with_member_works) }
+
+    before do
+      sign_in user_admin
+    end
+
+    it 'displays an edit page with a relationships tab' do
+      visit edit_hyrax_monograph_path(monograph)
+      expect(page).to have_link("Relationships")
+    end
+  end
 end