Added method deleteMeta

README.md

@@ -261,6 +261,16 @@ $postMeta = $post->createMeta('foo', 'bar'); // instance of PostMeta class
 $trueOrFalse = $post->saveMeta('foo', 'baz'); // boolean
 ```
 
+You can delete any metadata:
+
+```php
+$post = Post::find(1);
+$post->saveMeta('foo', 'baz');
+
+$post->deleteMeta('foo'); // true
+$post->deleteMeta('bar'); // false
+```
+
 ### Querying Posts by Custom Fields (Meta)
 
 There are multiples possibilities to query posts by their custom fields (meta) by using scopes on a `Post` (or another other model which uses the `HasMetaFields` trait) class:

src/Concerns/MetaFields.php

@@ -214,4 +214,16 @@ public function getMeta($attribute)
 
         return null;
     }
+
+    /**
+     * @param string $key
+     * @return bool
+     * @throws \Exception
+     */
+    public function deleteMeta($key): bool
+    {
+        $meta = $this->meta()->where('meta_key', $key)->first();
+
+        return $meta ? $meta->delete() : false;
+    }
 }

tests/Unit/Model/Meta/PostMetaTest.php

@@ -129,6 +129,16 @@ public function test_higher_order_functions_can_be_executed()
         $this->assertEquals($post->meta->one, 'two');
     }
 
+    public function test_its_value_can_be_removed()
+    {
+        $post = factory(Post::class)->create();
+        $post->saveMeta('foo', 'bar');
+
+        $this->assertFalse($post->deleteMeta('bar'));
+        $this->assertTrue($post->deleteMeta('foo'));
+        $this->assertFalse($post->deleteMeta('foo'));
+    }
+
     /**
      * @return PostMeta
      */