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ItemID

chromadb doesn’t support int ids, VikingDB does

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Document

class Document(TypedDict)

A Document is a record in the vector database.

id: ItemID | the unique identifier of the document. content: str | the text content of the chunk. metadata: Metadata, Optional | contains additional information about the document such as source, date, etc. embedding: Vector, Optional | the vector representation of the content.

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VectorDB

@runtime_checkable
class VectorDB(Protocol)

Abstract class for vector database. A vector database is responsible for storing and retrieving documents.

Attributes:

  • active_collection - Any | The active collection in the vector database. Make get_collection faster. Default is None.
  • type - str | The type of the vector database, chroma, pgvector, etc. Default is "".

Methods:

  • create_collection - Callable[[str, bool, bool], Any] | Create a collection in the vector database.
  • get_collection - Callable[[str], Any] | Get the collection from the vector database.
  • delete_collection - Callable[[str], Any] | Delete the collection from the vector database.
  • insert_docs - Callable[[List[Document], str, bool], None] | Insert documents into the collection of the vector database.
  • update_docs - Callable[[List[Document], str], None] | Update documents in the collection of the vector database.
  • delete_docs - Callable[[List[ItemID], str], None] | Delete documents from the collection of the vector database.
  • retrieve_docs - Callable[[List[str], str, int, float], QueryResults] | Retrieve documents from the collection of the vector database based on the queries.
  • get_docs_by_ids - Callable[[List[ItemID], str], List[Document]] | Retrieve documents from the collection of the vector database based on the ids.

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create_collection

def create_collection(collection_name: str,
                      overwrite: bool = False,
                      get_or_create: bool = True) -> Any

Create a collection in the vector database. Case 1. if the collection does not exist, create the collection. Case 2. the collection exists, if overwrite is True, it will overwrite the collection. Case 3. the collection exists and overwrite is False, if get_or_create is True, it will get the collection, otherwise it raise a ValueError.

Arguments:

  • collection_name - str | The name of the collection.
  • overwrite - bool | Whether to overwrite the collection if it exists. Default is False.
  • get_or_create - bool | Whether to get the collection if it exists. Default is True.

Returns:

Any | The collection object.

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get_collection

def get_collection(collection_name: str = None) -> Any

Get the collection from the vector database.

Arguments:

  • collection_name - str | The name of the collection. Default is None. If None, return the current active collection.

Returns:

Any | The collection object.

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delete_collection

def delete_collection(collection_name: str) -> Any

Delete the collection from the vector database.

Arguments:

  • collection_name - str | The name of the collection.

Returns:

Any

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insert_docs

def insert_docs(docs: list[Document],
                collection_name: str = None,
                upsert: bool = False,
                **kwargs) -> None

Insert documents into the collection of the vector database.

Arguments:

  • docs - List[Document] | A list of documents. Each document is a TypedDict Document.
  • collection_name - str | The name of the collection. Default is None.
  • upsert - bool | Whether to update the document if it exists. Default is False.
  • kwargs - Dict | Additional keyword arguments.

Returns:

None

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update_docs

def update_docs(docs: list[Document],
                collection_name: str = None,
                **kwargs) -> None

Update documents in the collection of the vector database.

Arguments:

  • docs - List[Document] | A list of documents.
  • collection_name - str | The name of the collection. Default is None.
  • kwargs - Dict | Additional keyword arguments.

Returns:

None

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delete_docs

def delete_docs(ids: list[ItemID],
                collection_name: str = None,
                **kwargs) -> None

Delete documents from the collection of the vector database.

Arguments:

  • ids - List[ItemID] | A list of document ids. Each id is a typed ItemID.
  • collection_name - str | The name of the collection. Default is None.
  • kwargs - Dict | Additional keyword arguments.

Returns:

None

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retrieve_docs

def retrieve_docs(queries: list[str],
                  collection_name: str = None,
                  n_results: int = 10,
                  distance_threshold: float = -1,
                  **kwargs) -> QueryResults

Retrieve documents from the collection of the vector database based on the queries.

Arguments:

  • queries - List[str] | A list of queries. Each query is a string.
  • collection_name - str | The name of the collection. Default is None.
  • n_results - int | The number of relevant documents to return. Default is 10.
  • distance_threshold - float | The threshold for the distance score, only distance smaller than it will be returned. Don’t filter with it if < 0. Default is -1.
  • kwargs - Dict | Additional keyword arguments.

Returns:

QueryResults | The query results. Each query result is a list of list of tuples containing the document and the distance.

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get_docs_by_ids

def get_docs_by_ids(ids: list[ItemID] = None,
                    collection_name: str = None,
                    include=None,
                    **kwargs) -> list[Document]

Retrieve documents from the collection of the vector database based on the ids.

Arguments:

  • ids - List[ItemID] | A list of document ids. If None, will return all the documents. Default is None.
  • collection_name - str | The name of the collection. Default is None.
  • include - List[str] | The fields to include. Default is None. If None, will include [“metadatas”, “documents”], ids will always be included. This may differ depending on the implementation.
  • kwargs - dict | Additional keyword arguments.

Returns:

List[Document] | The results.

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VectorDBFactory

class VectorDBFactory()

Factory class for creating vector databases.

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create_vector_db

@staticmethod
def create_vector_db(db_type: str, **kwargs) -> VectorDB

Create a vector database.

Arguments:

  • db_type - str | The type of the vector database.
  • kwargs - Dict | The keyword arguments for initializing the vector database.

Returns:

VectorDB | The vector database.

neo4j_graph_rag_capabilitychromadb