从我们刚刚保存的实体获取ID的最佳方法? [英] Best way to get the id from an entity we just saved?

问题描述

我想知道是否有一种方法可以获取刚用猫鼬保存的实体的ID(在BDD中自动生成).

I would like to know if there is a way to get the ID (automatically generated in the BDD) of an entity we just saved with mongoose.

也许在保存方法上有一个回调或其他东西，除了错误回调外，我在文档中什么都没找到.

Maybe there is a callback or something on the save method, i didn't find anything about it on the documentation, except the error callback.

谢谢.

推荐答案

新创建的文档的_id是在客户端而不是服务器上创建的.因此它实际上在您调用save之前就可用.

The _id of a newly created document is created on the client, not the server. So it's actually available before you even call save.

var newDoc = new MyModel({name: 'foobar'});
console.log(newDoc._id); // logs the assigned _id
newDoc.save(function(err, doc) {
    console.log(doc._id);  // also available here; newDoc._id == doc._id
});

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