數據庫中的寫法是:
db.page.find({},{"title":1,"link":1,'create_time':1})
在代碼中的寫法是:
詳細文檔如下:http://mongodb.github.io/node-mongodb-native/3.1/api/Collection.html#find
關鍵字:projection
var MongoClient = require('mongodb').MongoClient;
var url = "mongodb://localhost:27017/runoob";
MongoClient.connect(url, { useNewUrlParser: true }, function(err, db) {
if (err) throw err;
var dbo = db.db("demo");
dbo.collection("page"). find({},{projection:{title:1,link:1,create_time:1}}).toArray(function(err, result) { // 返回集合中所有數據
models = result;
resolve();
});
});