Mongodb数据操作基础

var mongodb = require('mongodb');
var server = new mongodb.Server('localhost', 27017, {auto_reconnect: true});
var db = new mongodb.Db('exampleDb', server);
// open database connection
db.open(function(err, db) {
if(!err) {
// access or create widgets collection
db.collection('widgets', function(err, collection) {
// remove all widgets documents
collection.remove(null,{safe : true}, function(err, result) {
if (!err) {
console.log('result of remove ' + result);
// create two records
var widget1 = {title : 'First Great widget',
desc : 'greatest widget of all',
price : 14.99};
var widget2 = {title : 'Second Great widget',
desc : 'second greatest widget of all',
price : 29.99};
collection.insert(widget1);
collection.insert(widget2, {safe : true}, function(err, result) {
if(err) {
console.log(err);
} else {
console.log(result);
//close database
db.close();
}
});
}
});
});
}
});