clear

Example:

from langchain_redis import RedisChatMessageHistory
from langchain_core.messages import HumanMessage, AIMessage

history = RedisChatMessageHistory(session_id="user123", redis_url="redis://localhost:6379")

# Add some messages
history.add_message(HumanMessage(content="Hello, AI!"))
history.add_message(AIMessage(content="Hello, human!"))

# Clear the history
history.clear()

# Verify that the history is empty
assert len(history.messages) == 0

Note:

• This method only clears messages for the current session_id.
• It uses RedisVL's FilterQuery to find all relevant messages and then deletes them individually using the Redis client.
• The operation removes all messages for the current session only.
• After clearing, the Redis search index is still maintained, allowing for immediate use of the same session_id for new messages if needed.
• This operation is irreversible. Make sure you want to remove all messages before calling this method.