🐛 User couldn't edit file sets

parent_doc is not a solr document, so calling ['has_model_ssim'] produced and error.

app/helpers/hyku_helper.rb

@@ -21,8 +21,16 @@ def admin_only_tenant_creation?
   end
 
   def parent_path(parent_doc)
-    model = parent_doc['has_model_ssim'].first
-    path = "hyrax_#{model.underscore}_path"
+    model = case parent_doc
+            when ActiveFedora::Base
+              parent_doc
+            when SolrDocument
+              parent_doc['has_model_ssim'].first.constantize
+            else
+              raise "Unknown parent_doc type: #{parent_doc.class}"
+            end
+
+    path = "#{model.model_name.singular_route_key}_path"
     main_app.send(path, parent_doc.id)
   end
 end