Build a RAG App with Streamlit and Ell Python

[@trueevangelion018]

I want to integrate Astra_Db database into this RAG but I also want to provide facility to upload pdf and ask question from it. If also you provide information on how to use multiple models of RAG as I am planning to use Mistral, GPT, Llama and Gemini

[@avinashmaurya4231]

How to Integrate Chroma_Db database into this RAG so that i dont need to upload my file everytime. Pleas Reply