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fix(chat-models): Throw exception if a system message passed to gemini #271

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merged 1 commit into from
Dec 15, 2023
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fix(chat-models): Throw exception if a system message passed to gemini #271

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7 changes: 3 additions & 4 deletions packages/langchain_google/lib/src/chat_models/google_ai/models/mappers.dart
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Original file line number Diff line number Diff line change
Expand Up @@ -13,10 +13,9 @@ extension ChatMessagesMapper on List<ChatMessage> {
List<Content> toContentList() {
return map(
(final message) => switch (message) {
// Gemini does not support system messages yet, so we include it as user message
final SystemChatMessage msg => Content(
role: _authorUser,
parts: [Part(text: msg.content)],
SystemChatMessage() => throw UnsupportedError(
'Google AI does not support system messages at the moment. '
'Attach your system message in the human message.',
),
final HumanChatMessage msg => Content(
role: _authorUser,
Expand Down