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fix: skip empty text parts and messages to avoid Gemini API error

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When Claude API sends an assistant message with empty text content like:
{"role":"assistant","content":[{"type":"text","text":""}]}
The translator was creating a part object {} with no data field,
causing Gemini API to return error:
"required oneof field 'data' must have one initialized field"
This fix:
1. Skips empty text parts (text="") during translation
2. Skips entire messages when their parts array becomes empty
This ensures compatibility when clients send empty assistant messages
in their conversation history.
This commit is contained in:
Darley
2026-01-29 04:13:07 +08:00
parent 9e5b1d24e8
commit 2666708c30
1 changed files with 13 additions and 3 deletions
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16
internal/translator/antigravity/claude/antigravity_claude_request.go
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@@ -155,10 +155,13 @@ func ConvertClaudeRequestToAntigravity(modelName string, inputRawJSON []byte, _
clientContentJSON, _ = sjson.SetRaw(clientContentJSON, "parts.-1", partJSON)
} else if contentTypeResult.Type == gjson.String && contentTypeResult.String() == "text" {
prompt := contentResult.Get("text").String()
partJSON := `{}`
if prompt != "" {
partJSON, _ = sjson.Set(partJSON, "text", prompt)
// Skip empty text parts to avoid Gemini API error:
// "required oneof field 'data' must have one initialized field"
if prompt == "" {
continue
}
partJSON := `{}`
partJSON, _ = sjson.Set(partJSON, "text", prompt)
clientContentJSON, _ = sjson.SetRaw(clientContentJSON, "parts.-1", partJSON)
} else if contentTypeResult.Type == gjson.String && contentTypeResult.String() == "tool_use" {
// NOTE: Do NOT inject dummy thinking blocks here.
@@ -285,6 +288,13 @@ func ConvertClaudeRequestToAntigravity(modelName string, inputRawJSON []byte, _
}
}
// Skip messages with empty parts array to avoid Gemini API error:
// "required oneof field 'data' must have one initialized field"
partsCheck := gjson.Get(clientContentJSON, "parts")
if !partsCheck.IsArray() || len(partsCheck.Array()) == 0 {
continue
}
contentsJSON, _ = sjson.SetRaw(contentsJSON, "-1", clientContentJSON)
hasContents = true
} else if contentsResult.Type == gjson.String {