`langchain_community.storage.astradb`.AstraDBStore¶

class langchain_community.storage.astradb.AstraDBStore(collection_name: str, token: Optional[str] = None, api_endpoint: Optional[str] = None, astra_db_client: Optional[AstraDB] = None, namespace: Optional[str] = None, *, async_astra_db_client: Optional[AsyncAstraDB] = None, pre_delete_collection: bool = False, setup_mode: SetupMode = SetupMode.SYNC)[source]¶

[Deprecated]

Notes

Deprecated since version langchain-community==0.0.22.

BaseStore implementation using DataStax AstraDB as the underlying store.

The value type can be any type serializable by json.dumps. Can be used to store embeddings with the CacheBackedEmbeddings.

Documents in the AstraDB collection will have the format

{
  "_id": "<key>",
  "value": <value>
}

Parameters

collection_name (str) – name of the Astra DB collection to create/use.
token (Optional[str]) – API token for Astra DB usage.
api_endpoint (Optional[str]) – full URL to the API endpoint, such as https://<DB-ID>-us-east1.apps.astra.datastax.com.
astra_db_client (Optional[AstraDB]) – alternative to token+api_endpoint, you can pass an already-created ‘astrapy.db.AstraDB’ instance.
async_astra_db_client (Optional[AsyncAstraDB]) – alternative to token+api_endpoint, you can pass an already-created ‘astrapy.db.AsyncAstraDB’ instance.
namespace (Optional[str]) – namespace (aka keyspace) where the collection is created. Defaults to the database’s “default namespace”.
setup_mode (SetupMode) – mode used to create the Astra DB collection (SYNC, ASYNC or OFF).
pre_delete_collection (bool) – whether to delete the collection before creating it. If False and the collection already exists, the collection will be used as is.

Methods

`__init__`(collection_name[, token, ...])	BaseStore implementation using DataStax AstraDB as the underlying store.
`amdelete`(keys)	Delete the given keys and their associated values.
`amget`(keys)	Get the values associated with the given keys.
`amset`(key_value_pairs)	Set the values for the given keys.
`ayield_keys`(*[, prefix])	Get an iterator over keys that match the given prefix.
`decode_value`(value)	Decodes value from Astra DB
`encode_value`(value)	Encodes value for Astra DB
`mdelete`(keys)	Delete the given keys and their associated values.
`mget`(keys)	Get the values associated with the given keys.
`mset`(key_value_pairs)	Set the values for the given keys.
`yield_keys`(*[, prefix])	Get an iterator over keys that match the given prefix.

__init__(collection_name: str, token: Optional[str] = None, api_endpoint: Optional[str] = None, astra_db_client: Optional[AstraDB] = None, namespace: Optional[str] = None, *, async_astra_db_client: Optional[AsyncAstraDB] = None, pre_delete_collection: bool = False, setup_mode: SetupMode = SetupMode.SYNC) → None[source]¶

BaseStore implementation using DataStax AstraDB as the underlying store.

The value type can be any type serializable by json.dumps. Can be used to store embeddings with the CacheBackedEmbeddings.

Documents in the AstraDB collection will have the format

{
  "_id": "<key>",
  "value": <value>
}

Parameters

collection_name (str) – name of the Astra DB collection to create/use.
token (Optional[str]) – API token for Astra DB usage.
api_endpoint (Optional[str]) – full URL to the API endpoint, such as https://<DB-ID>-us-east1.apps.astra.datastax.com.
astra_db_client (Optional[AstraDB]) – alternative to token+api_endpoint, you can pass an already-created ‘astrapy.db.AstraDB’ instance.
async_astra_db_client (Optional[AsyncAstraDB]) – alternative to token+api_endpoint, you can pass an already-created ‘astrapy.db.AsyncAstraDB’ instance.
namespace (Optional[str]) – namespace (aka keyspace) where the collection is created. Defaults to the database’s “default namespace”.
setup_mode (SetupMode) – mode used to create the Astra DB collection (SYNC, ASYNC or OFF).
pre_delete_collection (bool) – whether to delete the collection before creating it. If False and the collection already exists, the collection will be used as is.

Return type

None

async amdelete(keys: Sequence[str]) → None¶

Delete the given keys and their associated values.

Parameters: keys (Sequence[K]) – A sequence of keys to delete.
Return type: None

async amget(keys: Sequence[str]) → List[Optional[V]]¶

Get the values associated with the given keys.

Parameters: keys (Sequence[K]) – A sequence of keys.
Returns: A sequence of optional values associated with the keys. If a key is not found, the corresponding value will be None.
Return type: List[Optional[V]]

async amset(key_value_pairs: Sequence[Tuple[str, V]]) → None¶

Set the values for the given keys.

Parameters: key_value_pairs (Sequence[Tuple[K, V]]) – A sequence of key-value pairs.
Return type: None

async ayield_keys(*, prefix: Optional[str] = None) → AsyncIterator[str]¶

Get an iterator over keys that match the given prefix.

Parameters

prefix (str) – The prefix to match.

Returns

An iterator over keys that match the given prefix.

This method is allowed to return an iterator over either K or str depending on what makes more sense for the given store.

Return type

Iterator[K | str]

decode_value(value: Any) → Any[source]¶

Decodes value from Astra DB

Parameters: value (Any) –
Return type: Any

encode_value(value: Any) → Any[source]¶

Encodes value for Astra DB

Parameters: value (Any) –
Return type: Any

mdelete(keys: Sequence[str]) → None¶

Delete the given keys and their associated values.

Parameters: keys (Sequence[K]) – A sequence of keys to delete.
Return type: None

mget(keys: Sequence[str]) → List[Optional[V]]¶

Get the values associated with the given keys.

Parameters: keys (Sequence[K]) – A sequence of keys.
Returns: A sequence of optional values associated with the keys. If a key is not found, the corresponding value will be None.
Return type: List[Optional[V]]

mset(key_value_pairs: Sequence[Tuple[str, V]]) → None¶

Set the values for the given keys.

Parameters: key_value_pairs (Sequence[Tuple[K, V]]) – A sequence of key-value pairs.
Return type: None

yield_keys(*, prefix: Optional[str] = None) → Iterator[str]¶

Get an iterator over keys that match the given prefix.

Parameters

prefix (str) – The prefix to match.

Returns

An iterator over keys that match the given prefix.

This method is allowed to return an iterator over either K or str depending on what makes more sense for the given store.

Return type

Iterator[K | str]

langchain_community.storage.astradb.AstraDBStore¶

`langchain_community.storage.astradb`.AstraDBStore¶