Honour readable permission of keyvals dataset

Author: manisandro

src/data_service.py

@@ -576,8 +576,9 @@ def dataset_edit_permissions(self, dataset, identity, translator, write):
                         dataset_features_provider = self.dataset_features_provider(
                             identity, translator, table, False
                         )
-                        values = dataset_features_provider.keyvals(key_field_name, value_field_name)
-                        fields[field['name']]['constraints']['values'] = values
+                        if dataset_features_provider.readable():
+                            values = dataset_features_provider.keyvals(key_field_name, value_field_name)
+                            fields[field['name']]['constraints']['values'] = values
                     except Exception as e:
                         self.logger.error("Unable to resolve keyvalrel '%s': %s" % (keyvalrel, str(e)))
                         fields[field['name']]['constraints']['values'] = []