return db_data if source not found

backend/metagenedb/api/catalog/views/function.py

@@ -22,7 +22,12 @@ class FunctionViewSet(BulkViewSet):
     def _get_external_info(self, db_data):
         detailed_info_retriever = GetFunctionExternalInfo(db_data['function_id'],
                                                           db_data['source'])
-        detailed_data = detailed_info_retriever.get_details()  # @TODO check consistency?
+        try:
+            detailed_data = detailed_info_retriever.get_details()
+        except NotImplementedError as not_implemented_error:
+            logger.warning("Could not found API for the source, returning item from the DB. Error: %s" %
+                           not_implemented_error)
+            detailed_data = db_data
         return detailed_data
 
     def retrieve(self, request, *args, **kwargs):

backend/metagenedb/common/utils/external_api/togows.py

@@ -15,8 +15,7 @@ class GetFunctionExternalInfo:
         self.source = source
 
     def _get_unknown_source(self):
-        logger.warning("No source of information for %s from %s" % (self.function_id, self.source))
-        raise NotImplementedError
+        raise NotImplementedError("No source of information for %s from %s" % (self.function_id, self.source))
 
     def _get_kegg(self):
         """