phpstan: Address a range of level 2 issues

[bookstack] / app / Entities / Controllers / ChapterApiController.php

diff --git a/app/Entities/Controllers/ChapterApiController.php b/app/Entities/Controllers/ChapterApiController.php
index 8ac0c7a60a22a41c4e96864553ba3c7088a88fcf..6ba2e9fd2bf5d3bed8daff73deae6df54666005c 100644 (file)
--- a/app/Entities/Controllers/ChapterApiController.php
+++ b/app/Entities/Controllers/ChapterApiController.php
@@ -2,6 +2,7 @@
 
 namespace BookStack\Entities\Controllers;
 
+use BookStack\Entities\Models\Book;
 use BookStack\Entities\Models\Chapter;
 use BookStack\Entities\Queries\ChapterQueries;
 use BookStack\Entities\Queries\EntityQueries;
@@ -143,7 +144,10 @@ class ChapterApiController extends ApiController
         $chapter->load(['tags']);
         $chapter->makeVisible('description_html');
         $chapter->setAttribute('description_html', $chapter->descriptionHtml());
-        $chapter->setAttribute('book_slug', $chapter->book()->first()->slug);
+
+        /** @var Book $book */
+        $book = $chapter->book()->first();
+        $chapter->setAttribute('book_slug', $book->slug);
 
         return $chapter;
     }