Question

我正在设置博客，但我无法获取与个别博客帖子相关的评论数据。我正在使用Mongoose和Express。我正在尝试创建一个新帖子并将其推送到博客数组，但该关联不保存。当我拉起Mongo shell时，我可以单独看到我的数据库中的注释和博客对象，但它们在数据库中没有关联。但是，它们在我的路线中正确显示在控制台中。

以下是我在不同文件中的两个相关模式。

评论架构：

var mongoose = require("mongoose");

var commentSchema = new mongoose.Schema({
    author: String,
    desc: String,
    posted: {type: Date, default: Date.now()} 
});

module.exports = mongoose.model("Comment", commentSchema);

博客架构：

var mongoose = require("mongoose");

var blogSchema = new mongoose.Schema({
    author: String,
    title: String,
    desc: String,
    posted: {type: Date, default: Date.now()},
    comments: [
        {
            type: mongoose.Schema.Types.ObjectId,
            ref: "Comment"
        }
    ] 
});

module.exports = mongoose.model("Blog", blogSchema);

路线：

app.post("/blogs/:id/comments", function(req, res){
    Blog.findById(req.params.id, function(err, blog){
        if(err){
            // console.log(err);
            res.redirect("/blogs");
        } else {
            Comment.create(req.body.comment, function(err, comments){
                if(err){
                    console.log(err);
                } else {
                    blog.comments.push(comments);
                    blog.save();
                    console.log(blog);
                    res.redirect("/blogs/" + blog._id);
                }
            });
        }
    });
});

来自上面的控制台结果：

{ _id: 5a3ef348fcdd624a0c8416fb,
  title: 'Ah, a new post!',
  author: 'Lefty',
  desc: 'Here we are trying to see about fixing the issue with comments not being associated to the blog posts, but still being created.',
  __v: 0,
  comments:
   [ { _id: 5a3f06c0f33db14984baca92,
       desc: 'Save the turtles.',
       author: 'April',
       __v: 0,
       posted: 2017-12-24T01:45:16.864Z } ],
  posted: 2017-12-24T00:21:34.514Z }

以下是我的Mongo shell中的信息：

> db.blogs.find()
{ "_id" : ObjectId("5a3ef348fcdd624a0c8416fb"), "title" : "Ah, a new post!", "author" : "Lefty", "desc" : "Here we are trying to see about fixing the issue with comments not being associated to the blog posts, but still being created.", "comments" : [ ], "posted" : ISODate("2017-12-24T00:21:34.514Z"), "__v" : 0 }

无法获取要保存的新阵列

0 个答案: