[9.x] Add Model getAppends() (#44180)

* Add public method getAppends()

Useful for custom model mappings.

* Add test

* Update test

* Update HasAttributes.php

Co-authored-by: Taylor Otwell <[email protected]>

Author: artrz

src/Illuminate/Database/Eloquent/Concerns/HasAttributes.php

@@ -2078,6 +2078,16 @@ public function append($attributes)
         return $this;
     }
 
+    /**
+     * Get the accessors that are being appended to model arrays.
+     *
+     * @return array
+     */
+    public function getAppends()
+    {
+        return $this->appends;
+    }
+
     /**
      * Set the accessors to append to model arrays.
      *

tests/Database/DatabaseEloquentModelTest.php

@@ -1798,6 +1798,8 @@ public function testAppendingOfAttributes()
         $this->assertSame('camelCased', $model->camelCased);
         $this->assertSame('StudlyCased', $model->StudlyCased);
 
+        $this->assertEquals(['is_admin', 'camelCased', 'StudlyCased'], $model->getAppends());
+
         $this->assertTrue($model->hasAppended('is_admin'));
         $this->assertTrue($model->hasAppended('camelCased'));
         $this->assertTrue($model->hasAppended('StudlyCased'));