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170 | class MultiDocAutoRetrieverPack(BaseLlamaPack):
"""多文档自动检索器包。
使用weaviate作为底层存储。
Args:
docs (List[Document]): 要索引的文档列表。
**kwargs: 传递给底层索引的关键字参数。"""
def __init__(
self,
weaviate_client: Any,
doc_metadata_index_name: str,
doc_chunks_index_name: str,
metadata_nodes: List[BaseNode],
docs: List[Document],
doc_metadata_schema: VectorStoreInfo,
auto_retriever_kwargs: Optional[Dict[str, Any]] = None,
verbose: bool = False,
) -> None:
"""初始化参数。"""
import weaviate
# do some validation
if len(docs) != len(metadata_nodes):
raise ValueError(
"The number of metadata nodes must match the number of documents."
)
# authenticate
client = cast(weaviate.Client, weaviate_client)
# auth_config = weaviate.AuthApiKey(api_key="")
# client = weaviate.Client(
# "https://<weaviate-cluster>.weaviate.network",
# auth_client_secret=auth_config,
# )
# initialize two vector store classes corresponding to the two index names
metadata_store = WeaviateVectorStore(
weaviate_client=client, index_name=doc_metadata_index_name
)
metadata_sc = StorageContext.from_defaults(vector_store=metadata_store)
# index VectorStoreIndex
# Since "new_docs" are concise summaries, we can directly feed them as nodes into VectorStoreIndex
index = VectorStoreIndex(metadata_nodes, storage_context=metadata_sc)
if verbose:
print("Indexed metadata nodes.")
# construct separate Weaviate Index with original docs. Define a separate query engine with query engine mapping to each doc id.
chunks_store = WeaviateVectorStore(
weaviate_client=client, index_name=doc_chunks_index_name
)
chunks_sc = StorageContext.from_defaults(vector_store=chunks_store)
doc_index = VectorStoreIndex.from_documents(docs, storage_context=chunks_sc)
if verbose:
print("Indexed source document nodes.")
# setup auto retriever
auto_retriever = VectorIndexAutoRetriever(
index,
vector_store_info=doc_metadata_schema,
**(auto_retriever_kwargs or {}),
)
self.index_auto_retriever = IndexAutoRetriever(retriever=auto_retriever)
if verbose:
print("Setup autoretriever over metadata.")
# define per-document retriever
self.retriever_dict = {}
for doc in docs:
index_id = doc.metadata["index_id"]
# filter for the specific doc id
filters = MetadataFilters(
filters=[
MetadataFilter(
key="index_id", operator=FilterOperator.EQ, value=index_id
),
]
)
retriever = doc_index.as_retriever(filters=filters)
self.retriever_dict[index_id] = retriever
if verbose:
print("Setup per-document retriever.")
# setup recursive retriever
self.recursive_retriever = RecursiveRetriever(
"vector",
retriever_dict={"vector": self.index_auto_retriever, **self.retriever_dict},
verbose=True,
)
if verbose:
print("Setup recursive retriever.")
# plug into query engine
llm = OpenAI(model="gpt-3.5-turbo")
self.query_engine = RetrieverQueryEngine.from_args(
self.recursive_retriever, llm=llm
)
def get_modules(self) -> Dict[str, Any]:
"""返回一个包含LlamaPack内部信息的字典。
返回：
Dict[str, Any]: 包含LlamaPack内部信息的字典。
"""
return {
"index_auto_retriever": self.index_auto_retriever,
"retriever_dict": self.retriever_dict,
"recursive_retriever": self.recursive_retriever,
"query_engine": self.query_engine,
}
def run(self, *args: Any, **kwargs: Any) -> Any:
"""对索引运行查询。
返回：
任何：来自查询引擎的响应。
"""
return self.query_engine.query(*args, **kwargs)
|