18238: Make backwards compatible when StorageClasses is not in config

Arvados-DCO-1.1-Signed-off-by: Peter Amstutz <peter.amstutz@curii.com>

diff --git a/sdk/cwl/arvados_cwl/executor.py b/sdk/cwl/arvados_cwl/executor.py
index edb9d5b523c09bee4aa43f16705e27f2f15194d9..db1db28162583899d13e8248a3fc639dd639198c 100644 (file)
--- a/sdk/cwl/arvados_cwl/executor.py
+++ b/sdk/cwl/arvados_cwl/executor.py
@@ -549,7 +549,7 @@ The 'jobs' API is no longer supported.
         if runtimeContext.submit_request_uuid and self.work_api != "containers":
             raise Exception("--submit-request-uuid requires containers API, but using '{}' api".format(self.work_api))
 
-        default_storage_classes = ",".join([k for k,v in self.api.config()["StorageClasses"].items() if v.get("Default") is True])
+        default_storage_classes = ",".join([k for k,v in self.api.config().get("StorageClasses", {"default": {"Default": True}}).items() if v.get("Default") is True])
         if runtimeContext.storage_classes == "default":
             runtimeContext.storage_classes = default_storage_classes
         if runtimeContext.intermediate_storage_classes == "default":