Hi Afshin, adding a new field to an existing oneof is safe. Moving existing
fields into a new or existing oneof *may* be unsafe as described in the
language guide
<https://developers.google.com/protocol-buffers/docs/proto3#updating>.
Sounds like the guides you have looked into are inaccurate. If you don't
mind, can you provide a link?
On Sun, Mar 29, 2020 at 10:19 AM Afshin <afshin....@gmail.com> wrote:
> Hi all
>
> When I was reading guides for protobuf 3, there was a huge limitation for
> oneof field. The guide states that updating a message by adding new fields
> to an existing oneof field is not safe. For example, if I have following
> message:
>
> message TestIt {
> oneof my_field {
> DataA a = 1;
> DataB b = 2;
> }
> }
>
> I cannot update it to the this new message:
>
> message TestIt {
> oneof my_field {
> DataA a = 1;
> DataB b = 2;
> DataC c = 3;
> }
> }
>
> I think this is a really huge limitation for oneof field and makes it
> useless in a lot of cases. Is there any way to achieve something similar
> without using Any object?
>
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--
-Nadav
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