FAISS filter is not working

[yairTray]

Checked other resources

• I added a very descriptive title to this issue.
• I searched the LangChain documentation with the integrated search.
• I used the GitHub search to find a similar question and didn't find it.
• I am sure that this is a bug in LangChain rather than my code.
• The bug is not resolved by updating to the latest stable version of LangChain (or the specific integration package).

Example Code

k=2

combined_filter = {
"$and": [
schema_filter,
handler_filter,
]
}
base_retriever = vectorstore.as_retriever(
search_kwargs={"k": k, "filter": combined_filter}
)
filtered_docs = await base_retriever.ainvoke(query)

Error Message and Stack Trace (if applicable)

No response

Description

i see that the faiss vectorstore include documents with the right schema_type and handler_type but no documents are return in the filtered_docs variable.

System Info

langchain version : 0.2.16
langchaion_community version : 0.2.16

[keenborder786]

Can you share the schema_filter and handler_filter definition?

[yairTray]

sure.
schema_filter = {"schema_type": {"$eq": schema_type}}
handler_filter = {"handler_type": {"$eq": handler_type}}

[RuofanChen03]

Hi, I was able to replicate the issue. Were you able to resolve this issue?

[yairTray]

no, the problem still happen.

[RuofanChen03]

Hi, my group (@vincentzhang15 @TANYAL77 @LikeWang10067) and I (students from UofT for a course) are working on a fix, which would allow filters to be built with your desired syntax. Hoping to fix this soon!