猫鼬更新/ upsert? [英] Mongoose update/upsert?
问题描述
我查看了网站上的一些问题,但还没弄清楚我做错了什么。我有一些这样的代码:
I've looked at some of the questions on the site and haven't quite figured out what I'm doing wrong. I've some code like this:
var mongoose = require('mongoose'),
db = mongoose.connect('mongodb://localhost/lastfm'),
Schema = mongoose.Schema,
User = new Schema({
nick: String,
hmask: String,
lastfm: String
});
var UserModel = mongoose.model('User', User);
//Register user to mongodb
var reg_handler = function (act) {
// should add a new entry to the db if nick (act.nick) && hmask (act.host)
// aren't already in the db. Otherwise, update the entry that matches nick
// or hostmask with the new lastfm name (act.params)
};
var get_handler = function (act) {
UserModel.find({ nick: act.params }, function (err, users) {
if (err) { console.log(err) };
users.forEach(function (user) {
console.log('url for user is http://url/' + user.lastfm);
});
});
};
我不知道我应该在中间做什么来让它更新数据库正常。我已经尝试了很多东西,无法撤消以找出我尝试过的所有内容。这是我晚上的很大一部分,我希望它能够正常工作。
I'm not sure what I should be doing in the middle there to get it to update the database properly. I've tried quite a few things, can't undo to find out all what I've tried though. It's taken a large portion of my night and I want it working.
这几乎是我想要的,我想知道是否有办法在条件下做OR部分 .update()
This is almost what I want, I wonder if there is any way to do an OR in the conditions part of the .update()
var reg_handler = function (act) {
var lfmuser = { nick: act.nick, hmask: act.host, lastfm: act.params };
UserModel.update({ nick: act.nick }, { $set: lfmuser }, { upsert: true }, function(){});
};
我会继续玩弄它。
推荐答案
var reg_handler = function (act) {
UserModel.update({ $or: [{nick: act.nick}, {hmask: act.host}] }, { $set: { lastfm: act.params } }, { upsert: true }, function(){});
};
这正是我想要的,而且它是一行。 :D完美!
This does exactly what I wanted, and it's one line. :D Perfect!
这篇关于猫鼬更新/ upsert?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!