use Illuminate\Database\Eloquent\Model; class User extends Model { public function posts() { return $this->hasMany('App\Post'); } } class Post extends Model { public function user() { return $this->belongsTo('App\User'); } }In this example, we use the "hasMany" and "belongsTo" methods to define the relationship between a user and their posts. We can then easily query and manipulate this data using the methods provided by the Model Set package. The Model Set package is a part of the Laravel framework, a popular PHP web application framework.