'integer', 'gift' => 'integer', ]; protected function serializeDate(\DateTimeInterface $date) { return $date->format($this->dateFormat ?: 'Y-m-d H:i:s'); } public function user() { return $this->belongsTo(User::class, 'user_id', 'id'); } public function combo() { return $this->belongsTo(RechargeCombo::class, 'combo_id', 'id'); } public function pay() { return $this->belongsTo(Pay::class, 'pay_id', 'pay_id'); } }