go data_error ai_generated true

proto: (line 1:2): unknown field "unknownField" in jsonpb.Message

ID: go/protobuf-json-unmarshal-unknown-field

Also available as: JSON · Markdown · 中文
80%Fix Rate
88%Confidence
0Evidence
2024-11-05First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
1.x active — — —

Root Cause

The JSON data contains a field that is not defined in the protobuf message. This can happen when the JSON schema is out of sync with the proto definition.

generic

中文

JSON 数据包含 protobuf 消息中未定义的字段。这可能发生在 JSON 模式与 proto 定义不同步时。

Workarounds

  1. 90% success 
    // Option 1: Update proto and regenerate
// Option 2: Use jsonpb.Unmarshaler
unmarshaler := &jsonpb.Unmarshaler{AllowUnknownFields: true}
if err := unmarshaler.Unmarshal(strings.NewReader(jsonStr), &msg); err != nil {
    log.Fatal(err)
}
  2. 85% success 
    // Use a JSON schema validator or compare fields
// Or catch the error and log the unknown field for investigation

Dead Ends

Common approaches that don't work:

  1. 60% fail

    This may hide schema mismatches and lead to data loss or misinterpretation.

  2. 80% fail

    Not scalable and doesn't fix the underlying schema issue.