我正在尝试使用请求中的以下内容将消息发布到数据库:
{
"thread": 1,
"content": "lorem ipsum",
"author":
{
"name":"doc",
"email":""
}
}
相反，我收到错误消息“无法分配“OrderedDict([(u'name', doc'), (u'email', u'')])”:“Message.author”必须是“作者“实例”
每条消息都有一个相关的作者记录，数据库中可能已经存在也可能不存在。在这一点上，我不介意在该表上重复输入。
我的 serializers.py 文件包含以下内容:
class AuthorSerializer(serializers.Serializer):
pk = serializers.IntegerField(read_only=False, required=False)
name = serializers.CharField(required=True, max_length=50)
email = serializers.CharField(allow_blank=True, allow_null=True, required=False)
def create(self, validated_data):
"""
Create and return a new `Author` instance, given the validated data.
"""
return Author.objects.create(**validated_data)
def update(self, instance, validated_data):
"""
Update and return an existing `Author` instance, given the validated data.
"""
instance.name = validated_data.get('name', instance.name)
instance.email = validated_data.get('email', instance.email)
instance.save()
return instance
class Meta:
model = Author
fields = ('name', 'email')
class MessageSerializer(serializers.Serializer):
pk = serializers.IntegerField(read_only=True)
thread = serializers.PrimaryKeyRelatedField(queryset=Thread.objects.all())
created_at = serializers.DateTimeField(required=False)
content = serializers.CharField(style={'base_template': 'textarea.html'})
author = AuthorSerializer(required=False, read_only=False)
def create(self, validated_data):
"""
Create and return a new `Message` instance, given the validated data.
"""
return Message.objects.create(**validated_data)
def update(self, instance, validated_data):
"""
Update and return an existing `Message` instance, given the validated data.
"""
instance.thread = validated_data.get('thread', instance.thread)
instance.content = validated_data.get('content', instance.content)
instance.author = validated_data.get('author', instance.author)
instance.save()
return instance
class Meta:
model = Message
fields = ('thread', 'created_at', 'content', 'author')
我完全不知道应该如何进行，我是否期望 AuthorSerializer 能够将列表或有序字典解析为新的或现有的对象。
请您参考如下方法:
根据docs ，您必须在自定义创建方法中创建嵌套对象:
class MessageSerializer(serializers.Serializer):
pk = serializers.IntegerField(read_only=True)
thread = serializers.PrimaryKeyRelatedField(queryset=Thread.objects.all())
created_at = serializers.DateTimeField(required=False)
content = serializers.CharField(style={'base_template': 'textarea.html'})
author = AuthorSerializer(required=False, read_only=False)
def create(self, validated_data):
"""
Create and return a new `Message` instance, given the validated data.
"""
author_data = validated_data.pop('author', None)
if author_data:
author = Author.objects.get_or_create(**author_data)[0]
validated_data['author'] = author
return Message.objects.create(**validated_data)
