go data_error ai_generated true

rpc error: code = InvalidArgument desc = proto: User: field "email" is required

ID: go/grpc-failed-precondition-required-field

Also available as: JSON · Markdown · 中文
80%Fix Rate
84%Confidence
0Evidence
2024-12-02First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
github.com/envoyproxy/protoc-gen-validate 1.x active — — —

Root Cause

protoc-gen-validate (PGV) or the newer protovalidate rules rejected the message because a required field was empty. The server returns InvalidArgument with the validation message.

generic

中文

protoc-gen-validate（PGV）或较新的 protovalidate 规则因必填字段为空而拒绝该消息。服务端返回带验证消息的 InvalidArgument。

Workarounds

  1. 90% success 
    if err := user.Validate(); err != nil {
    return fmt.Errorf("invalid user: %w", err)
}
resp, err := client.Create(ctx, user)
  2. 85% success 
    st := status.New(codes.InvalidArgument, "validation failed")
br := &errdetails.BadRequest{FieldViolations: []*errdetails.BadRequest_FieldViolation{
    {Field: "email", Description: "required"},
}}
st, _ = st.WithDetails(br)
return nil, st.Err()

Dead Ends

Common approaches that don't work:

  1. 90% fail

    Removes all input safety checks and allows malformed data into downstream systems.

  2. 85% fail

    PGV rules like min_len:1 still reject empty strings; only non-empty values pass.