[BUGS] Prevent NullPointerException for Gemini models with empty AIMessage content #79
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Adds a check for empty message content before processing in GenericProvider, returning a default text when content is missing.
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Problem
When using Google Gemini models with tool calling,
AIMessageswith empty content (content="") cause aTransientServiceError(HTTP 500) due to a NullPointerException in the OCI backend when converting messages to Google's format.Issue link: #78
Solution
Check for empty content in AIMessages with tool calls before processing, and provide a minimal placeholder (
.) to prevent null serialization. This follows the same pattern used by the Cohere provider.Testing
Tested with
google.gemini-2.5-flashmodel using AIMessage with empty content and tool calls - error is now resolved.Model response:
content='The weather in Rome is currently sunny with a temperature of 20 degrees Celsius.' additional_kwargs={'finish_reason': 'stop'} response_metadata={'finish_reason': 'stop'} id='run--68c2e374-d8eb-43be-aec2-de2815789dc4-0'