'int', 'child_user_id' => 'int', 'new_sponsor_id' => 'int' ]; protected $fillable = [ 'inactive_sponsor_id', 'child_user_id', 'new_sponsor_id' ]; public function inactive_sponsor() { return $this->belongsTo(User::class, 'inactive_sponsor_id'); } public function child_user() { return $this->belongsTo(User::class, 'child_user_id'); } public function new_sponsor() { return $this->belongsTo(User::class, 'new_sponsor_id'); } }