Martín Gotelli Ferenaz

Description: Add support to filter by IS NULL criteria in the metadata Issue: N/A Dependencies: N/A Twitter handle: @martinferenaz This PR fixes the problem when you want to search if...

### Checked other resources - [X] I added a very descriptive title to this issue. - [X] I searched the LangChain documentation with the integrated search. - [X] I used...

Deprecation wrapper poor performance (latency)

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### Checked other resources - [X] I added a very descriptive title to this issue. - [X] I searched the LangChain documentation with the integrated search. - [X] I used...

Store initialization race condition - Table 'langchain_pg_collection' is already defined for this MetaData instance

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sqlalchemy.exc.InvalidRequestError: Table 'langchain_pg_collection' is already defined for this MetaData instance This error occurs when you create two instances of the PGVector instance at the same time. Since the models (CollectionStore...

False positive unsubscriptable-object for Pydantic model with dict Field

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### Bug description ```python """ With the new LangChain version (0.3.0) there is support for Pydantic V2, they changed all the models to use Pydantic V2, and some of our...

192: Add support to hash objects that are not Django models

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This solves #192

Distinct when asking flat values hashes incorrectly

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When trying to build a distinct query for a char field while mocking the query set I have been having a problem. Basically the way the distinct works tries to...