Django Rest Framework - can save foreign key with number value - django

Question

I try to serialize and save following json
{
"start": "2017-12-12",
"end": "2017-12-12",
"has_refund": false,
"room": {
"key": 0
},
"reserved_days": [ {
"date": "2017-12-12",
"price": "2",
"paymentMethod": "3"
},
{
"date": "2017-12-13",
"price": "2",
"paymentMethod": "3"
}
],
"check_in_time": "14:00",
"check_out_time": "12:00",
"guest_name": "Ivan",
"payed": false
}
SERIALIZERS
class DaySerializer(serializers.ModelSerializer):
class Meta:
model = Day
fields = [
'date',
'price',
'paymentMethod',
]
class RoomSerializer(serializers.ModelSerializer):
class Meta:
model = Room
fields = [
'key',
]
class ReservationSerializer(serializers.ModelSerializer):
room = RoomSerializer()
reserved_days = DaySerializer(many=True)
class Meta:
model = Reservation
fields = [
'start',
'end',
'check_in_time',
'check_out_time',
'reserved_days',
'room',
'has_refund',
'payed',
'guest_name',
'reservation_number',
]
def create(self, validated_data):
day_data = validated_data.pop('reserved_days')
room = validated_data.pop('room')
reservation = Reservation.objects.create(**validated_data)
existing_room = Room.objects.get(key=room['key'])
reservation.room = existing_room
reservation.save()
for day in day_data:
day, created = Day.objects.get_or_create(date=day['date'], price=day['price'], paymentMethod=day['paymentMethod'])
reservation.reserved_days.add(day)
return reservation
MODEL
class Day(models.Model):
date = models.DateField(auto_now=False, auto_now_add=False)
price = models.FloatField()
paymentMethod = models.CharField(max_length = 200)
def __unicode__(self):
return str(self.date)
class Room(models.Model):
name = models.CharField(max_length = 200, null=True)
key = models.AutoField(primary_key=True)
def __unicode__(self):
return self.name
class Reservation(models.Model):
start = models.DateField(verbose_name='Заезд', auto_now=False, auto_now_add=False, blank=False)
end = models.DateField(verbose_name='Выезд', auto_now=False, auto_now_add=False, blank=False)
check_in_time = models.TimeField(verbose_name='Время заезда', blank=False)
check_out_time = models.TimeField(verbose_name='Время выезда', blank=False)
has_refund = models.BooleanField(verbose_name='Возвратная бронь', default=True)
payed = models.BooleanField(verbose_name='Оплачено', default=False)
room = models.ForeignKey(Room, null=True, blank=True, verbose_name='Номер', on_delete=models.CASCADE)
reserved_days = models.ManyToManyField(Day, blank=False)
guest_name = models.CharField(verbose_name='Имя гостя', max_length=200, blank=True)
reservation_number = models.CharField(verbose_name='Номер брони', max_length=200, blank=True)
In response I get 500 error and this
KeyError at /core/create/
'key'
However, if I change field of room to name (inside room serializer and create method of reservation serializer), everything works perfectly
class RoomSerializer(serializers.ModelSerializer):
class Meta:
model = Room
fields = [
'name',
]
class ReservationSerializer(serializers.ModelSerializer):
room = RoomSerializer()
reserved_days = DaySerializer(many=True)
class Meta:
model = Reservation
fields = [
'start',
'end',
'check_in_time',
'check_out_time',
'reserved_days',
'room',
'has_refund',
'payed',
'guest_name',
'reservation_number',
]
def create(self, validated_data):
day_data = validated_data.pop('reserved_days')
room = validated_data.pop('room')
reservation = Reservation.objects.create(**validated_data)
existing_room = Room.objects.get(name=room['name'])
reservation.room = existing_room
reservation.save()
for day in day_data:
day, created = Day.objects.get_or_create(date=day['date'], price=day['price'], paymentMethod=day['paymentMethod'])
reservation.reserved_days.add(day)
return reservation
Seems that it works only with strings.
How to make it work with number ? The same thing happened with me when I tried saving with pk instead of separated int fieled