How to Check if Model Doesn't Have Relation in Laravel

To check whether a model has a relation or not in Laravel, you can make use of the "has()" and "doesntHave()" methods available to every Laravel model.

Check Model has() Relation
To check if a model has a relation you can make use of this method like below. Imagine you want to know whether a post has a comment, if it does then eager load it together.

<?php

$postHaveComments = Post::has('comments')
    ->with('comments')
    ->get();

Check Model doesntHave Relation
To check if a model doesn't have a relation, then you can write it like below. The query will return only the model that doesn't have a comments.

<?php

$postHasNoComments = Post::doesntHave('comments')
    ->get();