Question

我正在构建如下的活动模型。它具有content_type作为目标。

class Activity(models.Model):
    user = models.ForeignKey(Auth, related_name='activity')
    content_type = models.ForeignKey(ContentType, null=True)
    object_id = models.PositiveIntegerField()
    doc_object = GenericForeignKey('content_type', 'object_id')

现在，我们已经创建了一些模型，可以在Activity模型中使用这种模型。

class Comment(models.Model):
    user = models.ForeignKey(Auth, related_name='comment')
    title = models.CharField(max_length=256)


class Question(models.Model):
    user = models.ForeignKey(Auth, related_name='question')
    title = models.CharField(max_length=256)
    answer = models.TextField()

class Like(models.Model):
    user = models.ForeignKey(Auth, related_name='like')
    status = models.BooleanField(default=False)

我写了如下的序列化器

class AtivityInstanceRelatedField(serializers.RelatedField):
    """
    A custom field to use for the `tagged_object` generic relationship.
    """

    def to_representation(self, value):
        """
        Serialize tagged objects to a simple textual representation.
        """
        if isinstance(value, Comment):
            return 'Comment: ' + value.title

        elif isinstance(value, Question):
            return 'Question: ' + value.title

        if isinstance(value, Like):
            return 'Like: ' + Like.status
        raise Exception('Unexpected type of tagged object')


class AtivitySerializer(serializers.ModelSerializer):
    content_type = DocTemplateInstanceRelatedField(read_only=True)
    class Meta:
        model = Ativity
        fields = ['user','content_type']

我们方面的输出是从模型中获取字段名称例如。

{
    content_type:{
        Comment:{
            id,
            user,
            title,
        },
        Question:{
            id,
            user,
            title,
            answer,
        },
        Like:{
            id,
            user,
            status,
        }
    }
}

如何将数据发布到相关模型中。寻找急需的帮助，谢谢。

Django-如何使用contentType或通用关系获取API的模型字段名称？

0 个答案: