From 5892ffc7488b0c9cbb4ea08fd5c5f8648e0baea8 Mon Sep 17 00:00:00 2001
From: Frederick Muriuki Muriithi
Date: Wed, 22 Sep 2021 07:06:14 +0300
Subject: Update check: Heatmaps need at least 2 items

Issue:
https://github.com/genenetwork/gn-gemtext-threads/blob/main/topics/gn1-migration-to-gn2/clustering.gmi

* Update the check to look for at least 2 traits before trying to generate the
  heatmap.
---
 gn3/api/heatmaps.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/gn3/api/heatmaps.py b/gn3/api/heatmaps.py
index 0493f8a..1022a35 100644
--- a/gn3/api/heatmaps.py
+++ b/gn3/api/heatmaps.py
@@ -11,9 +11,9 @@ heatmaps = Blueprint("heatmaps", __name__)
 def clustered_heatmaps():
     heatmap_request = request.get_json()
     traits_names = heatmap_request.get("traits_names", tuple())
-    if len(traits_names) < 1:
+    if len(traits_names) < 2:
         return jsonify({
-            "message": "You need to provide at least one trait name."
+            "message": "You need to provide at least two trait names."
         }), 400
     conn, _cursor = database_connector()
     def parse_trait_fullname(trait):
-- 
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