Fix #1195 for real. POTENTIALLY BREAKING

app/views/shared/data/all/_metadata.json.jbuilder

@@ -2,7 +2,7 @@ json.object_tag object_tag(object)
 json.object_label label_for(object)
 json.global_id object.persisted? ? object.to_global_id.to_s : nil
 json.base_class object.class.base_class.name
-json.url url_for(only_path: false, format: :json)
+json.url_for url_for(only_path: false, format: :json)
 json.object_url url_for(metamorphosize_if(object))
 
 # TODO - this block has to go, and be loaded with the base of the object if needed, not with metadata, particularly