Add a validation for an unknwon algorithm name

Signed-off-by: tenzen-y <[email protected]>

Author: tenzen-y

pkg/suggestion/v1beta1/optuna/service.py

@@ -126,6 +126,8 @@ def validate_algorithm_spec(cls, experiment):
             return cls._validate_random_setting(algorithm_settings)
         elif algorithm_name == "grid":
             return cls._validate_grid_setting(experiment)
+        else:
+            return False, "unknown algorithm name {}".format(algorithm_name)
 
     @classmethod
     def _validate_tpe_setting(cls, algorithm_spec):