liferoad commented on code in PR #34708:
URL: https://github.com/apache/beam/pull/34708#discussion_r2055037317
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sdks/python/apache_beam/yaml/yaml_transform.py:
##########
@@ -85,6 +85,12 @@ def validate_against_schema(pipeline, strictness):
jsonschema.validate(pipeline, pipeline_schema(strictness))
except jsonschema.ValidationError as exn:
exn.message += f" around line {_closest_line(pipeline, exn.path)}"
+ # validation message for chain-type transform
+ if (exn.schema_path[-1] == 'not' and
+ exn.schema_path[-2] in ['input', 'output']):
+ exn.message = (
+ f"'{exn.schema_path[-2]}' should not be used "
+ "along with 'chain' type transforms. " + exn.message)
Review Comment:
can you write a test?
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