Fix jsonplus serializer dumps #1
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The parent class JsonPlusSerializer doesn't have dumps() or loads() methods, only dumps_typed() and loads_typed(). This fix corrects the fallback logic to properly use the parent's typed serialization methods. Fixes AttributeError: 'super' object has no attribute 'dumps'
The bug was in line 28 where super().dumps(obj) was called, but the parent class JsonPlusSerializer doesn't have a dumps() method. The correct fix is to use orjson.dumps() with default=self._default, which properly delegates LangChain object serialization to the parent's _default method.
…dler fix Tests validate that the fix properly handles: - HumanMessage, AIMessage, SystemMessage, ToolMessage serialization - Lists of messages (common LangGraph pattern) - Nested structures with embedded messages - dumps_typed() method (used by checkpointer) - Backwards compatibility with non-LangChain objects - LangChain serialized format revival All tests pass, confirming the fix works correctly.
Renamed test_fix_standalone.py to test_jsonplus_redis_serializer.py to better describe what is being tested (the JsonPlusRedisSerializer class).
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Fix JsonPlusRedisSerializer to handle LangChain message serialization
Problem
JsonPlusRedisSerializer.dumps()fails to serialize LangChain message objects (HumanMessage,AIMessage, etc.), breaking
AsyncRedisSavercheckpoint persistence:Solution
Before:
After:
Why This Works
_default()method which converts LangChain objects to their dict formatTesting
AsyncRedisSaver+ streaming chat with persistenceRelated
- Addresses similar issue to PR redis-developer#108 but with broader scope
- Supersedes the need for special-casing specific object types
- Compatible with existing checkpoint/serde infrastructure