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env variable based fix for non chatgpt embeddings (#3964)

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this is a simple fix for #2219 

i also added some documentation for this environment variable
This commit is contained in:
Martin Holzhauer
2023-05-06 01:31:38 +02:00
committed by GitHub
parent 6032a051e9
commit 0a7245f721
2 changed files with 7 additions and 2 deletions
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docs/ecosystem/pgvector.md
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@@ -24,6 +24,10 @@ To import this vectorstore:
from langchain.vectorstores.pgvector import PGVector
```
PGVector embedding size is not autodetected. If you are using ChatGPT or any other embedding with 1536 dimensions
default is fine. If you are going to use for example HuggingFaceEmbeddings you need to set the environment variable named `PGVECTOR_VECTOR_SIZE`
to the needed value, In case of HuggingFaceEmbeddings is would be: `PGVECTOR_VECTOR_SIZE=768`
### Usage
For a more detailed walkthrough of the PGVector Wrapper, see [this notebook](../modules/indexes/vectorstores/examples/pgvector.ipynb)