如何返回最后一个push()嵌入式文档 [英] How to return the last push() embedded document

问题描述

我一直试图找出是否可行.

I'm stuck trying to figure out if this is possible.

使用猫鼬的博客示例进行演示，但是我的实际用例稍微复杂一些:

Using the blog example from mongoose to demonstrate, however my actual use case is slightly more complicated:

var Comments = new Schema({
    title     : String
  , body      : String
  , date      : Date
});

var BlogPost = new Schema({
    author    : ObjectId
  , title     : String
  , body      : String
  , date      : Date
  , comments  : [Comments]
});

var BlogPost = mongoose.model('BlogPost');
var post = new BlogPost();

我需要创建一个新评论并将 new 评论返回给客户端.将注释作为嵌入式文档确实对我来说很方便，并且效果很好.但是，我不想每次添加新评论时都将每条评论都返回给客户端.

I need to create a new comment and return the new comment to the client. Having comments as embedded document is really convenient for me and works well. However I don't want to return every single comment to the client each time I add a new one.

post.comments.push({ title: 'My comment' });

在我使用猫鼬的过程中，我想知道如何获得新注释的id，这将有所帮助，并允许我添加其他功能，例如编辑注释或删除注释.

As I'm using mongoose if I could some how get the id of the new comment that would help and also allow me to add other functionality such as editing a commenting or deleting a comment.

唯一的方法就是将评论作为自己的收藏吗?

Is the only way to do this is to have comments as their own collection?

推荐答案

我想您要解决的问题是在客户发表评论后如何更新页面，对吗?

I guess that the problem you're trying to solve is to how to update the page after a client posts a comment, right?

因此，您要插入一个新注释.这意味着您已经有了它的数据.执行插入并将数据返回给客户端.或者，更好的是，返回一个简单的确认，因为客户端也具有完整的注释数据并可以单独呈现.

So, you're inserting a new comment. This means that you already have its data. Perform an insert and return the data to the client. Or, better yet, return a simple ack, since client also has full comment data and can render it by itself.

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