Kriskras99 opened a new pull request, #477:
URL: https://github.com/apache/avro-rs/pull/477
`AvroSchemaComponent` is extended with a function `field_default` which will
be called when deriving a record to set the default value for a field. The
default implementation is to return `None`, which means no default.
On the derive side, it is now possible to specify a default for a type using
`#[avro(default = "..")]`. It is also possible to disable setting a default for
a field with `#[avro(default = false)]`.
This enables users to use `#[serde(skip_serializing{_if})]` on most fields
without having to provide a default value.
Closes #434
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