fix(models): exclude LiteLlm's llm_client from field serialization#6165
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claud42 wants to merge 1 commit into
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fix(models): exclude LiteLlm's llm_client from field serialization#6165claud42 wants to merge 1 commit into
claud42 wants to merge 1 commit into
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Fixes google#6164 LiteLlm stores its client as a Pydantic field which has no JSON serializer. Any JSON dump of a LiteLlm therefore raises `PydanticSerializationError`, which surfaces as a 500 in `adk web` / `adk api_server` whenever a LiteLlm reaches a response payload. Ether provider (Gemini, Anthropic, Apigee) keeps its client off the model as a @cached_property, so it is never serialized. LiteLlm intentionally exposes llm_client as an injectable field for testing, so rather than convert it, mark it `exclude=True` — the client is dropped from serialization while remaining constructible and unchanged at runtime. Testing: - pytest tests/unittests/models/test_litellm.py (all pass)
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@claud42 can you sign the CLA? |
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@wuliang229 I submitted the CLA immediately after created this PR. Not sure how long it would take to be approved or synchronized here though. |
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@wuliang229 The CLA check has passed. |
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Link to Issue or Description of Change
1. Link to an existing issue (if applicable):
Problem:
LiteLlm stores its client as a Pydantic field which has no JSON serializer. Any JSON dump of a LiteLlm therefore raises
PydanticSerializationError, which surfaces as a 500 inadk web/adk api_serverwhenever a LiteLlm reaches a response payload.Solution:
Ether provider (Gemini, Anthropic, Apigee) keeps its client off the model as a
@cached_property, so it is never serialized. LiteLlm intentionally exposes llm_client as an injectable field for testing, so rather than convert it, mark itexclude=True— the client is dropped from serialization while remaining constructible and unchanged at runtime.Testing Plan
Unit Tests:
pytest tests/unittests/models/test_litellm.py (all pass)
Manual End-to-End (E2E) Tests:
Code and commands to re-produce the issue was provided in original issue ticket.
The problem resolved end to end with this fix.
Checklist