forked from Archives/langchain
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
64 lines
2.2 KiB
Python
64 lines
2.2 KiB
Python
from typing import Iterator, List, Optional, Sequence
|
|
|
|
from langchain.docstore.document import Document
|
|
from langchain.document_loaders.base import BaseLoader
|
|
|
|
|
|
class FaunaLoader(BaseLoader):
|
|
"""
|
|
Attributes:
|
|
query (str): The FQL query string to execute.
|
|
page_content_field (str): The field that contains the content of each page.
|
|
secret (str): The secret key for authenticating to FaunaDB.
|
|
metadata_fields (Optional[Sequence[str]]):
|
|
Optional list of field names to include in metadata.
|
|
"""
|
|
|
|
def __init__(
|
|
self,
|
|
query: str,
|
|
page_content_field: str,
|
|
secret: str,
|
|
metadata_fields: Optional[Sequence[str]] = None,
|
|
):
|
|
self.query = query
|
|
self.page_content_field = page_content_field
|
|
self.secret = secret
|
|
self.metadata_fields = metadata_fields
|
|
|
|
def load(self) -> List[Document]:
|
|
return list(self.lazy_load())
|
|
|
|
def lazy_load(self) -> Iterator[Document]:
|
|
try:
|
|
from fauna import Page, fql
|
|
from fauna.client import Client
|
|
from fauna.encoding import QuerySuccess
|
|
except ImportError:
|
|
raise ImportError(
|
|
"Could not import fauna python package. "
|
|
"Please install it with `pip install fauna`."
|
|
)
|
|
# Create Fauna Client
|
|
client = Client(secret=self.secret)
|
|
# Run FQL Query
|
|
response: QuerySuccess = client.query(fql(self.query))
|
|
page: Page = response.data
|
|
for result in page:
|
|
if result is not None:
|
|
document_dict = dict(result.items())
|
|
page_content = ""
|
|
for key, value in document_dict.items():
|
|
if key == self.page_content_field:
|
|
page_content = value
|
|
document: Document = Document(
|
|
page_content=page_content,
|
|
metadata={"id": result.id, "ts": result.ts},
|
|
)
|
|
yield document
|
|
if page.after is not None:
|
|
yield Document(
|
|
page_content="Next Page Exists",
|
|
metadata={"after": page.after},
|
|
)
|