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JavaScript@langchain/langgraph-checkpoint-mongodbMongoDBSaver
Classā—Since v0.0

MongoDBSaver

A LangGraph checkpoint saver backed by a MongoDB database.

Copy
class MongoDBSaver

Bases

BaseCheckpointSaver

Constructors

Properties

Methods

View source on GitHub
constructor
constructor→ MongoDBSaver
property
checkpointCollectionName: string
property
checkpointWritesCollectionName: string
property
client: MongoClient
property
db: Db
property
serde: SerializerProtocol
method
deleteThread→ Promise<void>
method
get→ Promise<Checkpoint<string, string> | undefined>
method
getNextVersion→ number
method
getTuple→ Promise<CheckpointTuple | undefined>
method
list→ AsyncGenerator<CheckpointTuple>
method
put→ Promise<RunnableConfig<Record<string, any>>>
method
putWrites→ Promise<void>

Delete all checkpoints and writes associated with a specific thread ID.

Generate the next version ID for a channel.

Default is to use integer versions, incrementing by 1. If you override, you can use str/int/float versions, as long as they are monotonically increasing.

Retrieves a checkpoint from the MongoDB database based on the provided config. If the config contains a "checkpoint_id" key, the checkpoint with the matching thread ID and checkpoint ID is retrieved. Otherwise, the latest checkpoint for the given thread ID is retrieved.

Retrieve a list of checkpoint tuples from the MongoDB database based on the provided config. The checkpoints are ordered by checkpoint ID in descending order (newest first).

Saves a checkpoint to the MongoDB database. The checkpoint is associated with the provided config and its parent config (if any).

Saves intermediate writes associated with a checkpoint to the MongoDB database.