Node.js MongoSkin承诺查询不工作
上述代码在控制台中输出以下内容:Node.js MongoSkin承诺查询不工作,node.js,mongodb,mongoskin,Node.js,Mongodb,Mongoskin,上述代码在控制台中输出以下内容: var co = require('co'); var MongoClient = require('mongoskin').MongoClient; var db = MongoClient.connect('mongodb://localhost:27017/hellye'); var countries = db.collection('countries', { strict: true }); co(function* () { v
var co = require('co');
var MongoClient = require('mongoskin').MongoClient;
var db = MongoClient.connect('mongodb://localhost:27017/hellye');
var countries = db.collection('countries', {
strict: true
});
co(function* () {
var doc =
yield countries.find({
country: 'scotland'
}).limit(1);
console.log('> 1');
console.log(doc);
});
countries.find({
country: 'scotland'
}).limit(1).next(function (err, doc) {
console.log('> 2');
console.log(doc);
});
第一个查询不起作用,这是为什么?文档说明它返回了一个承诺,所以它应该返回:。最后需要toArray()
> 2
{ _id: 56b33957a345a53d4c15f6bf,
country: 'scotland',
primaryLanguage: 'english' }
var doc =
yield countries.find({
country: 'scotland'
}).limit(1).toArray();