How to Associate and Dissociate Relationship in Laravel

To associate and dissociate a relationship model in Laravel you have to make sure that the corresponding model belongs to something. What this means is that the modal instance itself can be associated and dissociated based on how the relationship has been defined.

Define belongsTo relationship

Do imagine a "Post" model that belongs to "User" model. This can either be a "one to one" or "one to many" definition.

The inverse relation from the Post model will be the "belongsTo" definition.

How to associate a Model

To associate a model you can call the "associate" method on the relationship.

<?php

$firstUser = User::first();

Post::first()->user()->associate($firstUser)->save();

How to dissociate a Model

To dissociate a model you can call the "dissociate" method on the relationship.

<?php

$firstUser = User::first();

Post::first()->user()->dissociate($firstUser)->save();

Do note that you have to call the "save()" method in order for the code to be executed.

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