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From Doug Cutting <cutt...@apache.org>
Subject Re: default values
Date Sun, 20 Oct 2013 20:28:28 GMT
Note that builders do supply defaults.

http://avro.apache.org/docs/current/api/java/org/apache/avro/data/RecordBuilder.html

But that might not help you much here.

You might intersect your config json with the reader schema to determine
its implied writer schema.

Doug
On Oct 13, 2013 9:21 PM, "Koert Kuipers" <koert@tresata.com> wrote:

> i am testing parsing a json string using a record class defined in an
> .avdl file.
>
> i was hoping that if a field in the record has a default value that it is
> not mandatory to provide it in the json. however i get an exception:
>
> org.apache.avro.AvroTypeException: Expected field name not found: test123
>
> i guess it was silly of me to expect this?
> are default values only used in schema resolution (so reader vs writer
> schema)? and in this case there is no writer schema, just json data i
> created and a reader schema, so the default values will not help me?
>
> too bad because this seemed like a really quick and convenient way to
> create configuration objects that can be instantiated from json, but
> without "optional" fields with default values it loses a lot of it power.
>
>

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