From bf7a51087acfb3cf6706e18c028cc7ada5cebac9 Mon Sep 17 00:00:00 2001
From: Arun Isaac
Date: Wed, 18 Jan 2023 19:18:37 +0000
Subject: search: Ensure limits of chromosomal interval is non-negative.

* gn3/api/search.py (parse_location_field): Ensure limits of chromosomal
interval is non-negative.
---
 gn3/api/search.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'gn3/api')

diff --git a/gn3/api/search.py b/gn3/api/search.py
index 2038a14..3846aa7 100644
--- a/gn3/api/search.py
+++ b/gn3/api/search.py
@@ -174,7 +174,7 @@ def parse_location_field(species_query: xapian.Query,
         else:
             width = 50*10**3
             point = apply_si_suffix(location_str)
-            location = Just(point - width), Just(point + width)
+            location = Just(max(0, point - width)), Just(point + width)
         return ChromosomalInterval(chromosome.removeprefix("chr"), *location)
 
     def make_query(interval: ChromosomalInterval) -> xapian.Query:
-- 
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