o Zh@s^ddlZddlZddlmZmZmZmZddlmZddl m Z e e Z Gddde ZdS)N)DictListOptionalSequence)Document) BaseLoaderc@seZdZdZddddddedededeed eeed eeed ed dfd dZ d e e fddZ d e e fddZ d eefddZ ddedeeded efddZdS) MongodbLoaderzLoad MongoDB documents.NT)filter_criteria field_namesmetadata_names!include_db_collection_in_metadataconnection_stringdb_namecollection_namer r r r returnc Cszddlm}Wnty} ztd| d} ~ ww|s td|s&td|s,td|||_||_||_|p:g|_|p?i|_|pDg|_ ||_ |j ||_ |j ||_dS)a Initializes the MongoDB loader with necessary database connection details and configurations. Args: connection_string (str): MongoDB connection URI. db_name (str):Name of the database to connect to. collection_name (str): Name of the collection to fetch documents from. filter_criteria (Optional[Dict]): MongoDB filter criteria for querying documents. field_names (Optional[Sequence[str]]): List of field names to retrieve from documents. metadata_names (Optional[Sequence[str]]): Additional metadata fields to extract from documents. include_db_collection_in_metadata (bool): Flag to include database and collection names in metadata. Raises: ImportError: If the motor library is not installed. ValueError: If any necessary argument is missing. r)AsyncIOMotorClientzBCannot import from motor, please install with `pip install motor`.Nz#connection_string must be provided.zdb_name must be provided.z!collection_name must be provided.)Zmotor.motor_asyncior ImportError ValueErrorclientrrr r r r Z get_databasedbZget_collection collection) selfr rrr r r r rerc/var/www/html/lang_env/lib/python3.10/site-packages/langchain_community/document_loaders/mongodb.py__init__s2     zMongodbLoader.__init__cCst|S)aLoad data into Document objects. Attention: This implementation starts an asyncio event loop which will only work if running in a sync env. In an async env, it should fail since there is already an event loop running. This code should be updated to kick off the event loop from a separate thread if running within an async context. )asynciorunaload)rrrrloadJs zMongodbLoader.loadc sg}|j|jIdH}|}|j|j|2zF3dHW}|j||jdd}|jr5||j |j d|j durR|j||j dd}dd| D}d |}nt|}|t||dq6t||krutd t|d |d |S) z0Asynchronously loads data into Document objects.N)default)ZdatabasercSsg|]}t|qSr)str).0valuerrr nsz'MongodbLoader.aload.. )Z page_contentmetadataz6Only partial collection of documents returned. Loaded z docs, expected .)rZcount_documentsr _construct_projectionfind_extract_fieldsr r updaterrr valuesjoinr"appendrlenloggerwarning) rresultZ total_docsZ projectiondocr'fieldsZtextstextrrrrXs8   zMongodbLoader.aloadcCs:t|jpg}t|jp g}||}|rdd|DSdS)zuConstructs the projection dictionary for MongoDB query based on the specified field names and metadata names.cSsi|]}|dqS)r)r#fieldrrr sz7MongodbLoader._construct_projection..N)listr r )rr r Z all_fieldsrrrr)}sz#MongodbLoader._construct_projectionr documentr5r!c CsVi}|pgD]"}|}|dD]}|||}||krnq|dd}|||<q|S)zAExtracts and returns values for specified fields from a document.r(_)splitgetreplace) rr;r5r!Z extractedr8r$keyZnew_field_namerrrr+s    zMongodbLoader._extract_fields)r )__name__ __module__ __qualname____doc__r"rrrboolrrrrrr)r+rrrrr sH    ;% r)rloggingtypingrrrrZlangchain_core.documentsrZ)langchain_community.document_loaders.baser getLoggerrAr1rrrrrs