From 753c63349d5049910d94f497a239cb4ae904757f Mon Sep 17 00:00:00 2001
From: Sander Muller <github@scode.nl>
Date: Wed, 4 Sep 2024 16:58:55 +0200
Subject: [PATCH] Update BelongsToThrough.php

---
 src/Relations/BelongsToThrough.php | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/Relations/BelongsToThrough.php b/src/Relations/BelongsToThrough.php
index 745dcaf..6cee1f2 100644
--- a/src/Relations/BelongsToThrough.php
+++ b/src/Relations/BelongsToThrough.php
@@ -10,6 +10,7 @@
 use Illuminate\Database\Eloquent\SoftDeletes;
 use Illuminate\Database\Query\Expression;
 use Illuminate\Support\Str;
+use RuntimeException;
 
 /**
  * @template TRelatedModel of \Illuminate\Database\Eloquent\Model
@@ -341,7 +342,7 @@ public function getFirstForeignKeyName()
         $firstThroughParent = end($this->throughParents);
 
         if ($firstThroughParent === false) {
-            $firstThroughParent = $this->parent;
+            throw new RuntimeException('No "through" parent models were specified.');
         }
 
         return $this->prefix . $this->getForeignKeyName($firstThroughParent);
@@ -357,7 +358,7 @@ public function getQualifiedFirstLocalKeyName()
         $lastThroughParent = end($this->throughParents);
 
         if ($lastThroughParent === false) {
-            $lastThroughParent = $this->parent;
+            throw new RuntimeException('No "through" parent models were specified.');
         }
 
         return $lastThroughParent->qualifyColumn($this->getLocalKeyName($lastThroughParent));