update mongo template (#12838)

templates/rag-mongo/ingest.py

@@ -0,0 +1,35 @@
+import os
+
+from langchain.document_loaders import PyPDFLoader
+from langchain.embeddings import OpenAIEmbeddings
+from langchain.text_splitter import RecursiveCharacterTextSplitter
+from langchain.vectorstores import MongoDBAtlasVectorSearch
+from pymongo import MongoClient
+
+MONGO_URI = os.environ["MONGO_URI"]
+
+# Note that if you change this, you also need to change it in `rag_mongo/chain.py`
+DB_NAME = "langchain-test-2"
+COLLECTION_NAME = "test"
+ATLAS_VECTOR_SEARCH_INDEX_NAME = "default"
+EMBEDDING_FIELD_NAME = "embedding"
+client = MongoClient(MONGO_URI)
+db = client[DB_NAME]
+MONGODB_COLLECTION = db[COLLECTION_NAME]
+
+if __name__ == "__main__":
+    # Load docs
+    loader = PyPDFLoader("https://arxiv.org/pdf/2303.08774.pdf")
+    data = loader.load()
+
+    # Split docs
+    text_splitter = RecursiveCharacterTextSplitter(chunk_size=500, chunk_overlap=0)
+    docs = text_splitter.split_documents(data)
+
+    # Insert the documents in MongoDB Atlas Vector Search
+    _ = MongoDBAtlasVectorSearch.from_documents(
+        documents=docs,
+        embedding=OpenAIEmbeddings(disallowed_special=()),
+        collection=MONGODB_COLLECTION,
+        index_name=ATLAS_VECTOR_SEARCH_INDEX_NAME,
+    )