From 667953fd5c8d608e617197f1e645de7bb003fdde Mon Sep 17 00:00:00 2001
From: Muhammad Raihan Muhaimin <muhammad.r.muhaimin@gmail.com>
Date: Tue, 7 Jun 2016 17:04:52 -0400
Subject: [PATCH] Proper error message for undefined where options (#1022)

When user provides a knex select statement with an undefined options in where clause it is not properly handled an give an ambiguous error message telling `Unhandled rejection TypeError: Cannot read property 'toString' of undefined.` This PR will helpful to users at it will tell them the exact problem.
---
 lib/utils.js | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/utils.js b/lib/utils.js
index ff6b226f..177ae97b 100644
--- a/lib/utils.js
+++ b/lib/utils.js
@@ -48,6 +48,9 @@ var prepareValue = function(val, seen) {
   if(typeof val === 'object') {
     return prepareObject(val, seen);
   }
+  if (typeof val === 'undefined') {
+    throw new Error('SQL queries with undefined where clause option');
+  }
   return val.toString();
 };