Update app.py

app.py

@@ -50,9 +50,17 @@ def process_upload(files):
         path="./qdrant_db",  
         prefer_grpc=True
     )
-    
+    existing_collections = {col.name for col in client.get_collections().collections}
+    if collection_name not in existing_collections:
+        client.create_collection(
+            collection_name=collection_name,
+            vectors_config=models.VectorParams(
+                size=1536,  
+                distance=models.Distance.COSINE
+            )
+        )
     vector_store = QdrantVectorStore(
-        collection_name="paper",
+        collection_name=collection_name,
         client=client,
         enable_hybrid=True,
         batch_size=20,