From a433ff8a9bcd88ddfe2335801a15c71b4d1a0a3a Mon Sep 17 00:00:00 2001
From: Kevin Ruscoe <kevdotbadger@gmail.com>
Date: Fri, 5 Jan 2018 16:23:47 +0000
Subject: [PATCH] Update InteractsWithPivotTable.php

As with #22484 , when inserting a pivot record via `->attach()` the `InteractsWithPivotTable.php` trait doesn't check to see if the pivot table has a model representation. It' simply finds the table name and inserts a new record. Because of this, the timestamps are passed as `Carbon` instances and then turn to strings via its `toString()` method. If the consumer is using a pivot Model, it should use that models dateFormat to format by, not the `toString()` method. This simply news-up the pivot model, fetches it's dateformat and formats the `$fresh` date against it.
---
 .../Eloquent/Relations/Concerns/InteractsWithPivotTable.php  | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/Illuminate/Database/Eloquent/Relations/Concerns/InteractsWithPivotTable.php b/src/Illuminate/Database/Eloquent/Relations/Concerns/InteractsWithPivotTable.php
index 83da64e83da7..80d619447886 100644
--- a/src/Illuminate/Database/Eloquent/Relations/Concerns/InteractsWithPivotTable.php
+++ b/src/Illuminate/Database/Eloquent/Relations/Concerns/InteractsWithPivotTable.php
@@ -313,6 +313,11 @@ protected function baseAttachRecord($id, $timed)
     protected function addTimestampsToAttachment(array $record, $exists = false)
     {
         $fresh = $this->parent->freshTimestamp();
+        
+        if ($this->using) {
+            $pivotModel = new $this->using;
+            $fresh = $fresh->format($pivotModel::getDateFormat());
+        }
 
         if (! $exists && $this->hasPivotColumn($this->createdAt())) {
             $record[$this->createdAt()] = $fresh;