From daa6715a568a924295f250d946e28f94604ebf57 Mon Sep 17 00:00:00 2001
From: Daniel Blankenberg <dan.blankenberg@gmail.com>
Date: Fri, 26 Jun 2020 16:25:07 -0400
Subject: [PATCH] Enable regex validator to validate lists of values.

---
 lib/galaxy/tools/parameters/validation.py | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/lib/galaxy/tools/parameters/validation.py b/lib/galaxy/tools/parameters/validation.py
index 8a6624bafe9..f75a31bc6be 100644
--- a/lib/galaxy/tools/parameters/validation.py
+++ b/lib/galaxy/tools/parameters/validation.py
@@ -79,8 +79,11 @@ class RegexValidator(Validator):
         self.expression = expression
 
     def validate(self, value, trans=None):
-        if re.match(self.expression, value or '') is None:
-            raise ValueError(self.message)
+        if not isinstance(value, list):
+            value = [value]
+        for val in value:
+            if re.match(self.expression, val or '') is None:
+                raise ValueError(self.message)
 
 
 class ExpressionValidator(Validator):