From 9814b132c3bfcd6134236376b43fbc1ad1df6088 Mon Sep 17 00:00:00 2001
From: rr- <rr-@sakuya.pl>
Date: Mon, 24 Apr 2017 19:55:02 +0200
Subject: [PATCH] server/search: fix searching for ---

Allow only one negation sign.
Also throw an error if user searches only for "-".
---
 server/szurubooru/search/parser.py | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/server/szurubooru/search/parser.py b/server/szurubooru/search/parser.py
index 93affe26..6369bc6e 100644
--- a/server/szurubooru/search/parser.py
+++ b/server/szurubooru/search/parser.py
@@ -77,9 +77,11 @@ class Parser:
             if not chunk:
                 continue
             negated = False
-            while chunk[0] == '-':
+            if chunk[0] == '-':
                 chunk = chunk[1:]
-                negated = not negated
+                negated = True
+            if not chunk:
+                raise errors.SearchError('Empty negated token.')
             match = re.match('([a-z_-]+):(.*)', chunk)
             if match:
                 key, value = list(match.groups())