title: laravel: Call to a member function delete() on null
body: <p>I got this error when I tried to add a feature of delete, to the posts just by clicking on the delete button.
  Where am I doing wrong?</p>
  
  <p>Delete post function in PostController:</p>
  
  <pre><code>public function getDeletePost($post_id)
  {
      $post =Post::where('id',$post_id)-&gt;first();
      $post-&gt;delete();
      return redirect()-&gt;route('dashboard')-&gt;with(['message'=&gt; 'Successfully deleted!!']);
  } 
  </code></pre>