From ff02437032b7a26cd11100c4981201307765f66a Mon Sep 17 00:00:00 2001
From: Munyoki Kilyungi
Date: Sat, 3 Sep 2022 22:42:20 +0300
Subject: Replace assertion with Value Error for non-existent dataset

* wqflask/base/trait.py (retrieve_trait_info): Wrap error message in
ValueError.
---
 wqflask/base/trait.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/wqflask/base/trait.py b/wqflask/base/trait.py
index 57cc8a9b..c275083d 100644
--- a/wqflask/base/trait.py
+++ b/wqflask/base/trait.py
@@ -378,7 +378,8 @@ def jsonable(trait, dataset=None):
 
 
 def retrieve_trait_info(trait, dataset, get_qtl_info=False):
-    assert dataset, "Dataset doesn't exist"
+    if not dataset:
+        raise ValueError("Dataset doesn't exist")
 
     resource_id = get_resource_id(dataset, trait.name)
     if dataset.type == 'Publish':
-- 
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