Add default SEO Model so that ->prepareForUsage() will always work

src/Support/HasSEO.php

@@ -20,6 +20,6 @@ protected static function bootHasSEO(): void
 
     public function seo(): MorphOne
     {
-        return $this->morphOne(config('seo.model'), 'model');
+        return $this->morphOne(config('seo.model'), 'model')->withDefault();
     }
 }

tests/Unit/Support/SEODataTest.php

@@ -1,7 +1,10 @@
 <?php
 
+use RalphJSmit\Laravel\SEO\Models\SEO;
 use RalphJSmit\Laravel\SEO\Tests\Fixtures\Page;
 
+use function Pest\Laravel\assertDatabaseCount;
+
 beforeEach(function () {
     copy(__DIR__ . '/../../Fixtures/images/test-image.jpg', public_path('test-image.jpg'));
 });
@@ -17,4 +20,25 @@
 
     $this->assertEquals(1451, $SEOData->imageMeta()->width);
     $this->assertEquals(258, $SEOData->imageMeta()->height);
+});
+
+it('can allow to prepareForUsage without a model in the database', function () {
+    $page = Page::create();
+
+    $page->seo->delete();
+
+    $page->refresh();
+
+    $this->assertNull($page->seo->prepareForUsage()->title);
+
+    $page::$overrides = [
+        'title' => 'Test Title',
+    ];
+
+    $this->assertSame('Test Title', $page->seo->prepareForUsage()->title);
+
+    // Touch the page so that it is saved again. The default SEO model shouldn't be saved, but discarded.
+    $page->touch();
+
+    assertDatabaseCount(SEO::class, 0);
 });