Class AlloyDBChatMessageHistory (0.7.0)

AlloyDBChatMessageHistory(
    key: object,
    engine: langchain_google_alloydb_pg.engine.AlloyDBEngine,
    history: langchain_google_alloydb_pg.async_chat_message_history.AsyncAlloyDBChatMessageHistory,
)

Chat message history stored in an AlloyDB for PostgreSQL database.

Properties

messages

The abstraction required a property.

Methods

AlloyDBChatMessageHistory

AlloyDBChatMessageHistory(
    key: object,
    engine: langchain_google_alloydb_pg.engine.AlloyDBEngine,
    history: langchain_google_alloydb_pg.async_chat_message_history.AsyncAlloyDBChatMessageHistory,
)

AlloyDBChatMessageHistory constructor.

Parameters
Name	Description
`key`	`object` Key to prevent direct constructor usage.
`engine`	`AlloyDBEngine` Database connection pool.
`history`	`AsyncAlloyDBChatMessageHistory` Async only implementation.

Exceptions
Type	Description
`Exception`	If constructor is directly called by the user.

aadd_message

aadd_message(message: langchain_core.messages.base.BaseMessage) -> None

Append the message to the record in AlloyDB

aadd_messages

aadd_messages(
    messages: typing.Sequence[langchain_core.messages.base.BaseMessage],
) -> None

Append a list of messages to the record in AlloyDB

aclear

aclear() -> None

Clear session memory from AlloyDB

add_message

add_message(message: langchain_core.messages.base.BaseMessage) -> None

Append the message to the record in AlloyDB

add_messages

add_messages(
    messages: typing.Sequence[langchain_core.messages.base.BaseMessage],
) -> None

Append a list of messages to the record in AlloyDB

clear

clear() -> None

Clear session memory from AlloyDB

create

create(
    engine: langchain_google_alloydb_pg.engine.AlloyDBEngine,
    session_id: str,
    table_name: str,
    schema_name: str = "public",
) -> langchain_google_alloydb_pg.chat_message_history.AlloyDBChatMessageHistory

Create a new AlloyDBChatMessageHistory instance.

Parameters
Name	Description
`engine`	`AlloyDBEngine` AlloyDB engine to use.
`session_id`	`str` Retrieve the table content with this session ID.
`table_name`	`str` Table name that stores the chat message history.
`schema_name`	`str` The schema name where the table is located (default: "public").

Exceptions
Type	Description
`IndexError`	If the table provided does not contain required schema.

Returns
Type	Description
`AlloyDBChatMessageHistory`	A newly created instance of AlloyDBChatMessageHistory.

create_sync

create_sync(
    engine: langchain_google_alloydb_pg.engine.AlloyDBEngine,
    session_id: str,
    table_name: str,
    schema_name: str = "public",
) -> langchain_google_alloydb_pg.chat_message_history.AlloyDBChatMessageHistory

Create a new AlloyDBChatMessageHistory instance.

Parameters
Name	Description
`engine`	`AlloyDBEngine` AlloyDB engine to use.
`session_id`	`str` Retrieve the table content with this session ID.
`table_name`	`str` Table name that stores the chat message history.

Exceptions
Type	Description
`IndexError`	If the table provided does not contain required schema.

Returns
Type	Description
`AlloyDBChatMessageHistory`	A newly created instance of AlloyDBChatMessageHistory.