我有一个ModelSerializer
,但默认情况下它会序列化我的模型中的所有对象.我想将此查询集限制为最新的500个(而不是全部5000万个).我该怎么做呢?
我目前的情况如下:
class MyModelSerializer(serializers.ModelSerializer):
class Meta:
model = MyModel
我认为不能只在我的视图集中指定查询集的原因是,这实际上是另一个序列化程序的嵌套部分.
models.py
class Container(models.Model):
size = models.CharField(max_length=20)
shape = models.CharField(max_length=20)
class Item(models.Model):
container = models.ForeignKey(Container, related_name='items')
name = models.CharField(max_length=20)
color = models.CharField(max_length=20)
意见.py
class ContainerViewSet(viewsets.ModelViewSet):
queryset = Container.objects.all() # only a handful of containers
serializer_class = ContainerSerializer
序列化程序.py
class ItemSerializer(serializers.ModelSerializer):
class Meta:
model = Item
fields = ('name', 'color')
class ContainerSerializer(serializers.ModelSerializer):
items = ItemSerializer(many=True) # millions of items per container
class Meta:
model = Container
fields = ('size', 'shape', 'items')