Django Rest Framework发布主键uuid或自动生成 [英] Django Rest Framework post primary key uuid or autogenerate

问题描述

以下链接帮助了我很多

reference

所以，通过使用 id = serializers.UUIDField（）使传递一个ID。
如果缺少，它将不再自动生成。

So, by using id = serializers.UUIDField() makes passing an ID required. It will no longer autogenerate if on is missing.

我认为在这一点上，在任何序列化器上，我想要能够POST一个id，我需要要覆盖Create方法，如果在post数据中没有传递ID，那么在这里生成一个新的uuid并保存模型。
这是正确的吗？
OR
有没有DRF可以允许和id被传入或自动生成（如果不是）？

I assume at this point that on any serializer I want to be able to POST an id, I need to override the Create method and if no ID is passed in the post data, generate a new uuid there and save the model. Is this correct? OR Is there a way DRF can both allow for and id to be passed in or autogenerate if it is not?

编辑：我试过覆盖Create方法并生成一个新的uuid（如果它不存在），但看起来好像DRF首先检查数据仍然返回

I tried overriding the Create method and generating a new uuid if it is not present, but it appears as if DRF is checking the data first and still returns

{
 "id": [
 "This field is required."
 ]
}

Ps我不知道这是否完全相关，但是使用UUID作为主键的型号使用以下

P.s. I do not know if this is totally relevant but our models that use a UUID for the primary key are using the following

型号

class Company(models.Model):
id = PGUUIDField(primary_key=True)

和定义

class PGUUIDField(CharField):
def __init__(self, *args, **kwargs):     
    kwargs.setdefault('editable', not kwargs.get('primary_key', False))
    kwargs.setdefault('default', uuid.uuid4)
    kwargs.setdefault('max_length', 36)
    super(PGUUIDField, self).__init__(*args, **kwargs)
def deconstruct(self):
    name, path, args, kwargs = super(PGUUIDField, self).deconstruct()
    # Only include kwarg if it's not the default
    return name, path, args, kwargs
def db_type(self, connection=None):
    return 'uuid'
def get_db_prep_value(self, value, *args, **kwargs):        
    return self.to_python(value)
def to_python(self, value):
    if not value:
        return None
    if not isinstance(value, uuid.UUID):
        value = uuid.UUID("%s"%value)
    return value

推荐答案

答案：

我可以覆盖 init 方法，并检查kwargs中的 kwargs ['data'] ['id'] 如果不存在，请在调用超级类之前在kwargs中添加一个id字段。

I can override the init method and check the kwargs for an 'id' parameter in kwargs['data']['id'] and if it does not exist, add an 'id' field to kwargs before calling the super class.

class ControllerSerializer(serializers.ModelSerializer):   
id = serializers.UUIDField()
class Meta:
    model = Controller
    fields = ('id', 'name', 'other_id')

def __init__(self, *args, **kwargs):
    if kwargs['context']['request'].method == "POST":   
        try:
            kwargs['data']['id']
        except:
            kwargs['data']['id'] = uuid.uuid4()
    super(ControllerSerializer, self).__init__(*args, **kwargs)

所以现在我可以使用指定的id来POST POST！!!!

So now I can POST with a specified id or not!!!!

ps print语句仅用于调试

p.s. print statements are just for debugging

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