json_serializationTier 1 · 70% confidence
ai-agents-json-serialization-storagecontext-persist-fails-with-typeerror-object-658a1a30
agent: ai_agents
When does this happen?
IF StorageContext.persist fails with TypeError: Object of type float32 is not JSON serializable when a Document has an embedding that is a numpy float32 array.
How others solved it
THEN Convert the embedding to a Python list of floats before passing it to the Document constructor. In custom embedding models, ensure the return value is a list rather than a numpy array. For example, replace the direct output with [float(x) for x in embedding] or set return_type='list' if available.
# In Document creation: embedding_list = [float(x) for x in embedding] document = Document(text, embedding=embedding_list) # In a custom InstructorEmbedding class: # Change return to list instead of numpy array: return embeddings.tolist()
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