From e87494bbadfaf1b15562acee5cf641d06f208f5a Mon Sep 17 00:00:00 2001
From: Xenofon Spafaridis <nohponex@gmail.com>
Date: Mon, 7 Nov 2016 20:24:13 +0200
Subject: [PATCH] Allow empty [] when using PATCH  TO_MANY relationship

Fixes #54
---
 src/Controller/POST.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Controller/POST.php b/src/Controller/POST.php
index a8b2bb3..fa7ec1c 100644
--- a/src/Controller/POST.php
+++ b/src/Controller/POST.php
@@ -411,7 +411,7 @@ protected static function getParsedRelationshipAttributes(
             } elseif ($relationship->type == Relationship::TYPE_TO_MANY) {
                 $parsedValues = [];
 
-                if (!is_array($relationshipData)) {
+                if (!is_array($relationshipData) && (count((array) $relationshipData) > 0)) {
                     throw new RequestException(sprintf(
                         'Expected data to be an array for relationship "%s"',
                         $relationshipKey