[英]Filtering in serializers Django rest framework
在我的項目中,一個房間有不同的狀態,例如:已注冊,可用,每個狀態都有一個開始日期,我必須在狀態注冊時獲取 start_date。 我怎樣才能在序列化程序中做到這一點? 提前致謝!
在 model.py 中:
class RoomStatus(models.Model):
room = models.ForeignKey(Room, on_delete=models.DO_NOTHING, related_name='rooms')
class RoomStatusChoices(models.IntegerChoices):
REGISTERED = 1
RESERVED = 2
AVAILABLE = 3
room_status = models.SmallIntegerField(choices=RoomStatusChoices.choices, default=RoomStatusChoices.AVAILABLE)
start_date = models.DateTimeField(default=timezone.now())
在 serializers.py 中:
class RoomStatusSerializer(serializers.ModelSerializer):
class Meta:
model = RoomStatus
fields = ['id', 'start_date']
class RoomSerializer(serializers.ModelSerializer):
rooms = RoomStatusSerializer(many=True)
class Meta:
model = Room
fields = ['id', 'rooms']
在views.py中:
class RoomViewSet(RetrieveModelMixin, ListModelMixin, GenericViewSet, UpdateModelMixin):
queryset = Room.objects.all()
serializer_class = RoomSerializer
如果我理解正確,您可以執行以下操作:
但重要說明:
RoomStatus
對room
和room_status
沒有唯一約束,您必須處理有多個對象返回的情況,這將在使用.get()
時引發錯誤from .models import RoomStatus
class RoomSerializer(serializers.ModelSerializer):
register_date = serializers.SerializerMethodField()
def get_register_date(self, obj):
return RoomStatus.objects.get(room=obj.pk, room_status=1).start_date
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.