From 758ac51c61661499fce5359576c14529530efe2b Mon Sep 17 00:00:00 2001
From: Jason Quense <monastic.panic@gmail.com>
Date: Fri, 24 Jun 2016 11:17:07 -0400
Subject: [PATCH] [added] string.ensure

Coerce empty values to empty strings
---
 src/string.js | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/string.js b/src/string.js
index d4eb0a7f4..7baa5e2a1 100644
--- a/src/string.js
+++ b/src/string.js
@@ -88,6 +88,12 @@ inherits(StringSchema, MixedSchema, {
   },
 
   //-- transforms --
+  ensure() {
+    return this
+      .default('')
+      .transform(val => val === null ? '' : val)
+  },
+
   trim(msg) {
     msg = msg || locale.trim