Chelsea Dole created AVRO-2720:
----------------------------------
Summary: Avro py3 should display invalid field data on
AvroTypeException
Key: AVRO-2720
URL: https://issues.apache.org/jira/browse/AVRO-2720
Project: Apache Avro
Issue Type: Bug
Components: python
Reporter: Chelsea Dole
Calling "Validate"/"write" raises an AvroTypeException when the input "datum"
does not fit the input "expected_schema". It would be useful for users if
AvroTypeException specified which fields were not valid representations of the
expected_schema, by adding additional information to the string printed when
the error is thrown.
{code:java}
writer_schema = schema.parse("""\
{"type": "record", "name": "Test",
"fields": [{"name": "F", "type": "int"},
{"name": "E", "type": "int"}]}""")
datum_to_write = {'E': 5, 'F': 'Bad'}
datum_writer = avro_io.DatumWriter(writer_schema)
datum_writer.write(datum, encoder)
{code}
The last line of the above example ^ will throw an AvroTypeException, because
field "F" isn't an int. If there are multiple fields with incompatible types,
the message will only show the first field. Once it is fixed, it will throw
another AvroTypeException with the second incompatible type field, and so on.
*Current AvroTypeException Output:*
{code:java}
avro.io.AvroTypeException: The datum {'E': 5, 'F': 'Bad'} is not an example of
the schema {
"type": "record",
"name": "Test",
"fields": [{"type": "int", "name": "F"}, {"type": "int", "name":
"E"}]}{code}
*Suggested AvroTypeException Output:*
{code:java}
avro.io.AvroTypeException: Field 'F' with value 'Bad' has an unexpected type.
The datum {'E': 5, 'F': 'Bad'} is not an example of the schema {
"type": "record",
"name": "Test",
"fields": [{"type": "int", "name": "F"}, {"type": "int", "name": "E"}]}
{code}
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
