这是我的测试代码,我不知道它为什么不起作用,因为它与测试'populating multiple children of a sub-array at a time'非常相似。猫鼬填充
var mongoose = require('mongoose'),
Schema = mongoose.Schema,
ObjectId = Schema.ObjectId;
mongoose.connect('mongodb://localhost/testy');
var UserSchema = new Schema({
name: String
});
var MovieSchema = new Schema({
title: String,
tags: [OwnedTagSchema]
});
var TagSchema = new Schema({
name: String
});
var OwnedTagSchema = new Schema({
_name: {type: Schema.ObjectId, ref: 'Tag'},
_owner: {type: Schema.ObjectId, ref: 'User'}
});
var Tag = mongoose.model('Tag', TagSchema),
User = mongoose.model('User', UserSchema),
Movie = mongoose.model('Movie', MovieSchema);
OwnedTag = mongoose.model('OwnedTag', OwnedTagSchema);
User.create({name: 'Johnny'}, function(err, johnny) {
Tag.create({name: 'drama'}, function(err, drama) {
Movie.create({'title': 'Dracula', tags:[{_name: drama._id, _owner: johnny._id}]}, function(movie) {
// runs fine without 'populate'
Movie.find({}).populate('tags._owner').run(function(err, movies) {
console.log(movies);
});
});
})
});
生产误差
node.js:201
throw e; // process.nextTick error, or 'error' event on first tick
^
TypeError: Cannot call method 'path' of undefined
at /Users/tema/nok/node_modules/mongoose/lib/model.js:234:44
更新
接到OwnedTag摆脱和重写MovieSchema这样
var MovieSchema = new Schema({
title: String,
tags: [new Schema({
_name: {type: Schema.ObjectId, ref: 'Tag'},
_owner: {type: Schema.ObjectId, ref: 'User'}
})]
});
工作代码https://gist.github.com/1541219
不会,结果相同:-( – spacevillain 2011-12-30 18:48:28
啊。其实,回到原来的模型。你使用的是'.populate',但是你使用的是'tags'的子文档,而不是ref。我没有期待它的工作 - 我们越来越远离NoSQL数据库的实力 - 但是,也许这将工作 - 看到上面的第二次尝试。 – danmactough 2011-12-30 19:26:24
这打破了一切:-(我没有得到什么是https://github.com/LearnBoost/mongoose/blob/master/test/model.ref.test.js#L1109之间的区别也许你可以帮我看看吗? – spacevillain 2011-12-30 19:36:02