Enum with index 0 cannot be returned

[nituis]

grpcurl version: 1.1.0
proto3 is used

Case:
enum Status {
ACTIVE = 0;
INACTIVE = 1;
}

if Status is INACTIVE, return:
{
"status": "INACTIVE"
}

if Status is ACTIVE, return: {}
which should return
{
"status": "ACTIVE"
}

[jhump]

This is behaving as intended. Per the protobuf spec for the JSON format:

If a field has the default value in the protocol buffer, it will be omitted in the JSON-encoded data by default to save space.

You can change this behavior by providing the -emit-defaults flag, in which case default values will be explicitly included in the output (including for enum values).