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https://issues.apache.org/jira/browse/AVRO-1566?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14094602#comment-14094602
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Sean Busbey commented on AVRO-1566:
-----------------------------------
{noformat}
+ else:
+ self.write_data(field.type, None, encoder)
{noformat}
Worth a note that this maintains the behavior of allowing optional null fields
that don't specify a default? (even though this was probably incorrect
behavior, [our getting started guide mentions relying on this
behavior|http://avro.apache.org/docs/1.7.7/gettingstartedpython.html#Serializing+and+deserializing+without+code+generation].)
Actually, looking at io.py did defaulting to None actually work or did it throw?
> Use field default value to fill in missing values when serializing records
> --------------------------------------------------------------------------
>
> Key: AVRO-1566
> URL: https://issues.apache.org/jira/browse/AVRO-1566
> Project: Avro
> Issue Type: Improvement
> Components: python
> Reporter: Jeno I. Hajdu
> Priority: Minor
> Attachments: AVRO-1566.patch
>
>
> Field default values according to the spec are meant to fill in fields
> present in the reader schema but missing from the writer schema during
> deserialization. In addition to that default values could be used in the
> writer schema to fill in missing values when serializing. This is already
> supported in the Java implementation through record builders.
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