From de53a2ec6f869cdf5da3cef2af71986f13273da9 Mon Sep 17 00:00:00 2001
From: Hillel Coren <hillelcoren@gmail.com>
Date: Sun, 9 Jul 2017 21:34:41 +0300
Subject: [PATCH] Support clearing due date

---
 app/Ninja/Repositories/InvoiceRepository.php | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/app/Ninja/Repositories/InvoiceRepository.php b/app/Ninja/Repositories/InvoiceRepository.php
index 4b174c05f76f..0bcecd5cf2db 100644
--- a/app/Ninja/Repositories/InvoiceRepository.php
+++ b/app/Ninja/Repositories/InvoiceRepository.php
@@ -448,7 +448,9 @@ class InvoiceRepository extends BaseRepository
                 $invoice->due_date = $data['due_date'];
             }
         } else {
-            if (! empty($data['due_date']) || ! empty($data['due_date_sql'])) {
+            if ($isNew && empty($data['due_date']) && $invoice->due_date) {
+                // do nothing
+            } elseif (isset($data['due_date']) || isset($data['due_date_sql'])) {
                 $invoice->due_date = isset($data['due_date_sql']) ? $data['due_date_sql'] : Utils::toSqlDate($data['due_date']);
             }
             $invoice->frequency_id = 0;