leo-vital commented on issue #252:
URL: https://github.com/apache/avro-rs/issues/252#issuecomment-3177972207
> You could use `#[avro(default = "null")]` on the `subtitle` field. It will
produce a RecordField like:
>
> ```
> RecordField {
> name: "subtitle",
> doc: None,
> aliases: None,
> default: Some(
> String("null"),
> ),
> schema: Union(
> UnionSchema {
> schemas: [
> Null,
> String,
> ],
> variant_index: {
> Null: 0,
> String: 1,
> },
> },
> ),
> order: Ascending,
> position: 2,
> custom_attributes: {},
> },
> ```
>
> But as you already figured out the canonical form won't have the `default`
field, so most probably you will still get the same error from the registry.
Yes, I did not mention it but indeed, even using `#[avro(default = "null")]`
the generated schema does not change in its canonical form.
I ended up sending an email to the mailing list, hopefully I will get an
answer eventually.
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