langchain_core.chat_history
.InMemoryChatMessageHistory¶
- class langchain_core.chat_history.InMemoryChatMessageHistory[source]¶
Bases:
BaseChatMessageHistory
,BaseModel
In memory implementation of chat message history.
Stores messages in a memory list.
Create a new model by parsing and validating input data from keyword arguments.
Raises ValidationError if the input data cannot be parsed to form a valid model.
- param messages: List[BaseMessage] [Optional]¶
A list of messages stored in memory.
- async aadd_messages(messages: Sequence[BaseMessage]) None [source]¶
Async add messages to the store.
- Parameters
messages (Sequence[BaseMessage]) – The messages to add.
- Return type
None
- add_ai_message(message: Union[AIMessage, str]) None ¶
Convenience method for adding an AI message string to the store.
Please note that this is a convenience method. Code should favor the bulk add_messages interface instead to save on round-trips to the underlying persistence layer.
This method may be deprecated in a future release.
- Parameters
message (Union[AIMessage, str]) – The AI message to add.
- Return type
None
- add_message(message: BaseMessage) None [source]¶
Add a self-created message to the store.
- Parameters
message (BaseMessage) – The message to add.
- Return type
None
- add_messages(messages: Sequence[BaseMessage]) None ¶
Add a list of messages.
Implementations should over-ride this method to handle bulk addition of messages in an efficient manner to avoid unnecessary round-trips to the underlying store.
- Parameters
messages (Sequence[BaseMessage]) – A sequence of BaseMessage objects to store.
- Return type
None
- add_user_message(message: Union[HumanMessage, str]) None ¶
Convenience method for adding a human message string to the store.
Please note that this is a convenience method. Code should favor the bulk add_messages interface instead to save on round-trips to the underlying persistence layer.
This method may be deprecated in a future release.
- Parameters
message (Union[HumanMessage, str]) – The human message to add to the store.
- Return type
None
- async aget_messages() List[BaseMessage] [source]¶
Async version of getting messages.
Can over-ride this method to provide an efficient async implementation. In general, fetching messages may involve IO to the underlying persistence layer.
- Returns
List of messages.
- Return type
List[BaseMessage]