如何在Option[Timestamp]
文件中描述以下案例类的*.proto
:
case class User(name: String, created: Option[Timestamp] = None)
*.proto
包含:
message User {
string name = 1;
how_to_describe_type_of_timestamp created = 2; // ???
}
答案 0 :(得分:2)
看起来你正在使用" proto3" (因为required
上没有optional
或name
),在这种情况下:所有都是可选的;也许只是:
syntax = "proto3";
import "google/protobuf/timestamp.proto";
message User {
string name = 1;
.google.protobuf.Timestamp created = 2;
}
如果这是" proto2",那么大概是:
syntax = "proto2";
import "google/protobuf/timestamp.proto";
message User {
required string name = 1;
optional .google.protobuf.Timestamp created = 2;
}