From a3c0a12584a22a834ece5baa08702320db74242f Mon Sep 17 00:00:00 2001
From: Frederick Muriuki Muriithi
Date: Fri, 9 Sep 2022 13:41:03 +0300
Subject: Check whether trait_list and sample_data exist before operations

---
 wqflask/wqflask/correlation/rust_correlation.py | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/wqflask/wqflask/correlation/rust_correlation.py b/wqflask/wqflask/correlation/rust_correlation.py
index 775f4ee9..ef3988e5 100644
--- a/wqflask/wqflask/correlation/rust_correlation.py
+++ b/wqflask/wqflask/correlation/rust_correlation.py
@@ -20,6 +20,9 @@ from gn3.db_utils import database_connector
 def query_probes_metadata(dataset, trait_list):
     """query traits metadata in bulk for probeset"""
 
+    if not bool(trait_list):
+        return []
+
     with database_connector() as conn:
         with conn.cursor() as cursor:
 
@@ -221,6 +224,8 @@ def __compute_sample_corr__(
     sample_data = get_sample_corr_data(
         sample_type=start_vars["corr_samples_group"], all_samples=all_samples,
         dataset_samples=this_dataset.group.all_samples_ordered())
+    if not bool(sample_data):
+        return {}
 
     if target_dataset.type == "ProbeSet":
         with database_connector() as conn:
-- 
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