From 7c8989643d76a4fb14950164f7ee314ce6be2fa1 Mon Sep 17 00:00:00 2001
From: Graham Campbell <GrahamCampbell@users.noreply.github.com>
Date: Fri, 3 Jul 2020 01:00:44 +0100
Subject: [PATCH] Added float comparison null checks

---
 src/Illuminate/Database/Eloquent/Concerns/HasAttributes.php | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/Illuminate/Database/Eloquent/Concerns/HasAttributes.php b/src/Illuminate/Database/Eloquent/Concerns/HasAttributes.php
index b6c080a7f2e5..c5fa43a60955 100644
--- a/src/Illuminate/Database/Eloquent/Concerns/HasAttributes.php
+++ b/src/Illuminate/Database/Eloquent/Concerns/HasAttributes.php
@@ -1179,6 +1179,10 @@ public function originalIsEquivalent($key, $current)
             return $this->castAttribute($key, $current) ==
                 $this->castAttribute($key, $original);
         } elseif ($this->hasCast($key, ['real', 'float', 'double'])) {
+            if (($current === null && $original !== null) || ($current !== null && $original === null)) {
+                return false;
+            }
+
             return abs($this->castAttribute($key, $current) - $this->castAttribute($key, $original)) < PHP_FLOAT_EPSILON * 4;
         } elseif ($this->hasCast($key)) {
             return $this->castAttribute($key, $current) ===