【一起学node.js （九）】实现评论功能

这个地方错了，应该是：

{
"user":"...",
"time":{
    ...
},
"title":"...",
"post":"...",
"comments":[
    {
    "name":"lisi",
    "email":"...",
    "website":"...",
    “time”:”...”,
    "content":"..."
    },
    {
    "name":"wangwu",
    "email":"...",
    "website":"...",
    “time”:”...”,
    "content":"..."
    }
    ......
],
"_id":"..."
}

ratdream 2楼•2年前

楼主很细心，不错~~支持一下

nswbmw 3楼•2年前

修复一个bug，在comment.js中我想先find那篇文章，获取id，然后通过id来update一个comment，这写错了：

query_id.id = doc._id;

最起码也应该是

query_id._id = doc._id;

。。。但我试了试貌似也不行，所我查了查node-mongodb-bative中正好有一个findAndModify。。它的作用就是find+update的合体，所以我们直接用这个findAndModify操作就可以了。 http://mongodb.github.io/node-mongodb-native/api-generated/collection.html#findandmodify comment.js改成以下内容：

var mongodb = require('./db');

function Comment(user, day, title, comment) {
    this.user = user;
    this.day = day;
    this.title = title;
    this.comment = comment;
}

module.exports = Comment;

Comment.prototype.save = function(callback) {
var user = this.user,
    day = this.day,
    title = this.title,
    comment = this.comment;
mongodb.open(function (err, db) {
    if (err) {
        return callback(err);
    }

    db.collection('posts', function (err, collection) {
        if (err) {
            mongodb.close();
            return callback(err);
        }

        collection.findAndModify({"user":user,"time.day":day,"title":title}
        , [['time',-1]]
        , {$push:{"comments":comment}}
        , {new: true}
        , function (err,comment) {
            mongodb.close();
            callback(err,comment);
        });   
    });
});
};