'int', 'permission_id' => 'int' ]; protected $fillable = [ 'user_id', 'permission_id' ]; public function sf_guard_permission() { return $this->belongsTo(SfGuardPermission::class, 'permission_id'); } public function sf_guard_user() { return $this->belongsTo(SfGuardUser::class, 'user_id'); } }