From 29c81708b1930f1ed6584ceebe842ab6cc2285ee Mon Sep 17 00:00:00 2001
From: Guillaume Coupelant <guillaume.coupelant@gmail.com>
Date: Tue, 8 Mar 2016 17:50:23 +0100
Subject: [PATCH] fix(type): resolve null id on optionnal fields

---
 src/type/type.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/type/type.js b/src/type/type.js
index 7bf3c40..fc0373b 100644
--- a/src/type/type.js
+++ b/src/type/type.js
@@ -235,7 +235,7 @@ export default function getType(graffitiModels, {name, description, fields}, pat
         type: reference,
         resolve: addHooks((rootValue, args, info) => {
           const resolver = getOneResolver(graffitiModels[reference]);
-          return resolver(rootValue, {id: rootValue[name].toString()}, info);
+          return resolver(rootValue, {id: rootValue[name] ? rootValue[name].toString() : null}, info);
         }, hooks)
       };
     }