go data_error ai_generated true

proto: required field "user.id" not set

ID: go/protobuf-required-field-not-set

Also available as: JSON · Markdown · 中文
80%Fix Rate
85%Confidence
0Evidence
2024-06-19First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
google.golang.org/protobuf v1.26+ active — — —

Root Cause

A proto2 message has a required field that was not populated before marshaling. proto3 removed required, but proto2 (and some migrated schemas) still enforce it.

generic

中文

proto2 消息中存在必填字段，在序列化前未赋值。proto3 已移除 required，但 proto2（及部分迁移中的 schema）仍强制校验。

Workarounds

  1. 90% success 
    Populate required fields before marshal, or migrate the schema to proto3:
msg := &pb.User{Id: userID, Name: name}
if err := proto.Marshal(msg); err != nil { return err }
  2. 85% success 
    If the field truly is optional, edit the .proto to remove `required` and regenerate:
// user.proto
message User { optional string id = 1; }

Dead Ends

Common approaches that don't work:

  1. 60% fail

    Produces wire bytes that downstream strict servers reject; the field is still missing.

  2. 75% fail

    proto2 distinguishes 'unset' from 'zero'; setting zero still counts as set only if you explicitly assign it — but semantically you're sending bad data.