在我的Django-mongodb模型上,我希望有一个包含对其他对象的引用的listField的对象。这是我想要实现的一个例子:
models.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 Resources)
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“Comment”对象的“Object ID”列表。如果没有做任何事情,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/"
}
]
我希望得到的是:
[...],
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:如何解析对象评论的引用,并通过对资源发布的API调用使其可用?
如果无法做到这一点,那么设计我的非关系数据模型的最佳方式是什么,以便帖子可以包含多个评论,但 >评论可以单独访问并独立更新吗?
非常感谢你的帮助!!
答案 0 :(得分:1)
尝试自定义PostResource的脱水功能,如下所示:
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