Construindo aplicativos de AI e RAG com MongoDB, Anyscale e PyMongo

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{
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  "fields": [
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    {
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      "type": "vector",
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      "path": "embedding",
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      "numDimensions": 1024,
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      "similarity": "cosine"
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    }
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  ]
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}

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https://XXXXXXXXXXXX.anyscaleuserdata.com

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https://YYYYYYYYYYYYY.anyscaleuserdata.com

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pip install pymongo openai fastapi 

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from typing import Any
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from fastapi import FastAPI, HTTPException
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from pydantic import BaseModel
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from pymongo import MongoClient
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import os
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import openai
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from dotenv import load_dotenv
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from ray import serve
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import logging
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# Initialize FastAPI
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fastapi = FastAPI()
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# Initialize logger
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logger = logging.getLogger("ray.serve")
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# Data model for the request
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class QueryModel(BaseModel):
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   query: str
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@serve.deployment
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@serve.ingress(fastapi)
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class MongoDBRag:
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   def __init__(self):
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       # MongoDB connection
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       client = MongoClient(os.getenv("MONGODB_ATLAS_URI"))
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       db = client["anyscale_db"]
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       self.collection = db["stories"]
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       # AI Client initialization
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       # LLM endpoint for text generation
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       self.openai_llm = openai.OpenAI(
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           base_url="https://YYYYYYYYYYYYY.anyscaleuserdata.com/v1",
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           api_key=os.getenv('LLM_API_KEY')
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       )
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       # Embedding endpoint for vector embeddings
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       self.openai_embedding = openai.OpenAI(
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           base_url="https://XXXXXXXXXXXX.anyscaleuserdata.com/v1",
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           api_key=os.getenv('EMBEDDING_API_KEY')
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       )
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   @fastapi.post("/rag_endpoint/")
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   async def rag_endpoint(self, query: QueryModel) -> Any:
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       try:
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           # Generate embedding for the input query
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           embedding = self.openai_embedding.embeddings.create(
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               model="thenlper/gte-large",
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               input=query.query,
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           )
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           # Perform vector search in MongoDB to find relevant context
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           context = list(self.collection.aggregate([
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               {"$vectorSearch": {
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                   "queryVector": embedding.data[0].embedding,
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                   "index": "vector_index",
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                   "numCandidates": 3,
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                   "path": "embedding",
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                   "limit": 1
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               }},
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               {
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                   "$project": {
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                       "_id": 0,
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                       "embedding": 0
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                   }
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               }
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           ]))
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           # Construct prompt with context and query
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           prompt = f""" Based on the following context please answer and elaborate the user query.
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           context: {context}
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           query: {query.query}
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           Answer: """
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           # Generate response using LLM
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           chat_completion = self.openai_llm.chat.completions.create(
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               model="meta-llama/Llama-2-70b-chat-hf",
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               messages=[
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                   {"role": "system", "content": "You are a helpful QA assistant"},
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                   {"role": "user", "content": prompt}
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               ],
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               temperature=0.7
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           )
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           answer = chat_completion.choices[0].message.content
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           return answer
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       except Exception as e:
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           raise HTTPException(status_code=500, detail=str(e))
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# Bind the deployment
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my_app = MongoDBRag.bind()

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from pymongo import MongoClient
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import os
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import openai
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from dotenv import load_dotenv
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client = MongoClient(os.getenv("MONGODB_ATLAS_URI"))
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db = client["anyscale_db"]
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collection = db["stories"]
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# Embedding endpoint for vector embeddings
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openai_embedding = openai.OpenAI(
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    base_url="https://XXXXXXXXXXXX.anyscaleuserdata.com/v1",
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    api_key=os.getenv('EMBEDDING_API_KEY')
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)
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def generate_data() -> str:
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    # Sample data to be inserted into MongoDB
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    data = [
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        "Karl lives in NYC and works as a chef",
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        "Rio lives in Brasil and works as a barman",
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        "Jessica lives in Paris and works as a programmer."
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    ]
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    for info in data:
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        # Generate embedding for each piece of information
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        embedding = openai_embedding.embeddings.create(
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            model="thenlper/gte-large",
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            input=info,
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        )
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        # Update or insert the data with its embedding into MongoDB
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        collection.update_one(
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            {'story': info},
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            {'$set': {'embedding': embedding.data[0].embedding}},
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            upsert=True
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        )
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    return "Data Ingested Successfully"
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generate_data()

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 data = [
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               "Karl lives in NYC and works as a chef",
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               "Rio lives in Brasil and works as a barman",
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               "Jessica lives in Paris and works as a programmer."
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           ]

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python generate.py

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serve run main:my_app --non-blocking

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payload = {"query": "Main character list"}
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# Perform the POST request
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response = requests.post("http://localhost:8000/rag_endpoint", json=payload)
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# Print the response in JSON format
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print(response.json())

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Based on the provided context, the main character list is:
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1. Jessica
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2. Rio
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3. Karl

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anyscale services deploy  main:my_app --name=my-rag-service

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(anyscale +2.0s) Starting new service 'my-rag-service'.
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(anyscale +4.5s) Using workspace runtime dependencies env vars: {'MONGODB_ATLAS_URI': '<YOUR_URI>', 'LLM_API_KEY': '<YOURKEY>',  'EMBEDDING_API_KEY': '<YOURKEY>'}.
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(anyscale +4.5s) Uploading local dir '.' to cloud storage.
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(anyscale +5.5s) Including workspace-managed pip dependencies.
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(anyscale +6.1s) Service 'my-rag-service' deployed.
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(anyscale +6.1s) View the service in the UI: 'https://console.anyscale.com/services/service2_wx8ar3cbuf84g9u87g3yvx2cq8'
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(anyscale +6.1s) Query the service once it's running using the following curl command:
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(anyscale +6.1s) curl -H 'Authorization: Bearer xxxxxxx' https://my-rag-service-yyyy.xxxxxxxxxxxx.s.anyscaleuserdata.com/

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curl -X POST \
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     -H "Authorization: Bearer XXXX" \
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     -H "Content-Type: application/json" \
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    https://my-rag-service-yyyy.cld-yga7qm8f6yamqev7.s.anyscaleuserdata.com/rag_endpoint/ \
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     --data-raw '{"query": "What are the main character names?" }'
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"The main character names mentioned in the stories are Jessica, Karl and Rio."