如何使Manytomany字段的Serializer类在POST上为空

Question

ItemSerializers用于模型Item，它是模型manytomany中的supplier字段，试图使它不是必需的，但它不起作用， ，她是我的代码：

class SupplierSerializer(serializers.HyperlinkedModelSerializer):
    id = serializers.IntegerField(read_only=True)
    person_name = serializers.CharField(max_length=120, allow_blank=True)
    company_name = serializers.CharField(max_length=120, allow_blank=True)
    tax_number = serializers.CharField(max_length=120, allow_blank=True)
    items = ItemSerializer(many=True, allow_null=True, required=False)
    class Meta:
        model = Supplier
        fields = '__all__'

问题出在那

    items = ItemSerializer(many=True, allow_null=True, required=False)

我无法发送帖子，而项目字段为空！

Answer 1

设置read_only=True

items = ItemSerializer(many=True, read_only=True)