Question

我需要编写custome create方法来进行嵌套序列化，所以我要这样做：

def create(self, validated_data):
    images = validated_data['commodity']['images']
    del validated_data['commodity']['images']
    commodity = Commodity.objects.create(**validated_data['commodity'])
    del validated_data['commodity']
    for image in images:
        CommodityImage.objects.create(commodity=commodity, **image)
    sizes = validated_data['outwear']['sizes']
    del validated_data['outwear']['sizes']
    clother = Clother.objects.create(commodity=commodity, **validated_data)
    outwear = Outwear.objects.create(clother=clother, **validated_data['outwear'])
    for size in sizes:
        outwear.sizes.add(size)
    return clother

大多数执行良好和磨损实例的线会创建，但是无法添加尺寸到磨损实例，该实例在模型中具有sizes作为ManyToMany字段，最后我得到KeyError'sizes'与没有说明。我究竟做错了什么？谢谢！

已添加：

def create(self, validated_data):
    images = validated_data['commodity']['images']
    del validated_data['commodity']['images']
    commodity = Commodity.objects.create(**validated_data['commodity'])
    del validated_data['commodity']
    for image in images:
        CommodityImage.objects.create(commodity=commodity, **image)

    sizes = validated_data['outwear']['sizes']
    # del validated_data['outwear']['sizes']

    clother = Clother.objects.create(commodity=commodity, **validated_data)
    outwear_type = validated_data['outwear']['outwear_type']
    name = validated_data['outwear']['name']
    outwear = Outwear.objects.create(clother=clother, outwear_type=outwear_type, name=name)
    for size in sizes:
        outwear.sizes.add(size)
    return clother

这解决了问题。看起来很奇怪，因为如果我尝试再次删除尺寸-我会遇到相同的“尺寸”问题。我也有一个：

def __str__(self):
    return str(self.size)

作为我的尺寸方法（DecimalField）。

Answer 1

KeyError'sizes'在此行

sizes = validated_data['outwear']['sizes']

检查validated_data，也许您需要查看尺码是否在外套中？

Django序列化KeyError（Django Rest Framework）

1 个答案: