Django，mongodb，Tastypie-nonrel : List of ForeignKey

Question

在我的 Django-mongodb 模型上，我想要一个对象，它的 listField 包含对其他对象的引用。这是我想要实现的示例:

模型.py

class Comment(models.Model):
    title = models.CharField(max_length=50)
    body = models.CharField(max_length=50)

class Post(models.Model):
    name = models.CharField(max_length=50)
    commentList = ListField(models.ForeignKey(Comment))

api.py(Tastypie 资源)

class CommentResource(MongoResource):    
    class Meta:
        object_class = Comment
        queryset = Comment.objects.all()
        resource_name = 'comment'
        authentication = Authentication()
        authorization = Authorization()

class PostResource(MongoResource):
    commentList = ListField(models.ForeignKey('CommentResource', 'commentList')   #Wrong but just the expression of my incomprehension.
    class Meta:
        object_class = Post
        queryset = Post.objects.all()
        resource_name = 'post'
        authentication = Authentication()
        authorization = Authorization()

在此示例中，字段“commentList”包含引用“评论”对象的“对象 ID”列表。如果什么都不做，我的“发布”资源上的 HTTP GET 将给我:

[...],
objects: [
{
id: "4f47b159c789550388000000",
name: "Hello World",
commentList: "[u'4f47b14ec789550387000000']",
resource_uri: "/api/v1/post/4f47b159c789550388000000/"
}
]

我想得到的是:

[...],
objects: [
{
id: "4f47b159c789550388000000",
name: "Hello World",
commentList: 
[
    comment:{
        title : "My comment title",
        body : "It would be great if tastypie-nonrel could do this!",
        resource_uri: "/api/v1/comment/454f4v59c789550388051486/"
    }
],
resource_uri: "/api/v1/post/4f47b159c789550388000000/"
}
]

我的问题是:如何解析对对象 Comment 的引用，并通过对资源 Post 的 API 调用使其可用？

如果这不可能，那么设计我的非关系数据模型的最佳方式是什么，以便一个帖子可以包含多个评论，但是那个评论是否可以单独访问并独立更新？

非常感谢您的帮助!

Answer 1

尝试像这样自定义 PostResource 的脱水功能:

class PostResource(MongoResource):
    commentList = ListField(models.ForeignKey('CommentResource', 'commentList')
    class Meta:
        object_class = Post
        queryset = Post.objects.all()
        resource_name = 'post'
        authentication = Authentication()
        authorization = Authorization()

    def dehydrate(self, bundle):
        cmt_res = CommentResource()
        cmt_bundles = [cmt_res.build_bundle(c) for c in bundle.obj.commentList]
        for cb in cmt_bundles:
            cmt_res.full_dehydrate(cb)
        bundle.data['commentList'] = cmb_bundles