'date', ]; /** * Format a date * * @param DateTimeInterface $date * @return string */ protected function serializeDate(DateTimeInterface $date) { return $date->format('Y-m-d'); } /** * BelongsTo shop relation * * @return \Illuminate\Database\Eloquent\Relations\BelongsTo */ public function shop() { return $this->belongsTo(Shop::class); } }