langchain.memory.chat_message_histories.postgres.PostgresChatMessageHistory¶
class langchain.memory.chat_message_histories.postgres.PostgresChatMessageHistory(session_id: str, connection_string: str = 'postgresql://postgres:mypassword@localhost/chat_history', table_name: str = 'message_store')[source]¶
Chat message history stored in a Postgres database.
Attributes
messages
Retrieve the messages from PostgreSQL
Methods
__init__(session_id[, connection_string, ...])
add_ai_message(message)
Convenience method for adding an AI message string to the store.
add_message(message)
Append the message to the record in PostgreSQL
add_user_message(message)
Convenience method for adding a human message string to the store.
clear()
Clear session memory from PostgreSQL
__init__(session_id: str, connection_string: str = 'postgresql://postgres:mypassword@localhost/chat_history', table_name: str = 'message_store')[source]¶
add_ai_message(message: str) → None¶
Convenience method for adding an AI message string to the store.
Parameters
message – The string contents of an AI message.
add_message(message: BaseMessage) → None[source]¶
Append the message to the record in PostgreSQL
add_user_message(message: str) → None¶
Convenience method for adding a human message string to the store.
Parameters
message – The string contents of a human message.
clear() → None[source]¶
Clear session memory from PostgreSQL
Examples using PostgresChatMessageHistory¶
Postgres Chat Message History