bug fix Chromadb

ChromaDBFlow.py

@@ -122,14 +122,14 @@ class ChromaDBFlow(AtomicFlow):
                 raise ValueError(f"content(query) must be a string during read, got {type(content)}: {content}")
             if content == "":
                 response["retrieved"] = [[""]]
-                return response
-            query = content
-            query_result = self.collection.query(
-                query_embeddings=embeddings.embed_query(query),
-                n_results=self.flow_config["n_results"]
-            )
-
-            response["retrieved"] = [doc for doc in query_result["documents"]]
+            else:
+                query = content
+                query_result = self.collection.query(
+                    query_embeddings=embeddings.embed_query(query),
+                    n_results=self.flow_config["n_results"]
+                )
+
+                response["retrieved"] = [doc for doc in query_result["documents"]]
 
         elif operation == "write":
             if content != "":