const MongoClient = require('mongodb').MongoClient;

const assert = require('assert');

const url = 'mongodb://127.0.0.1:27017';

const dbName = 'jhblog';

MongoClient.connect(url, {useNewUrlParser:true}, function (err, client) {

    assert.equal(null, err);

    console.log('Connected successfully to server');

    const db = client.db(dbName);

    db.collection("posts", function (err, collection) {

        var list = [

            {title: "马里奥", tag:"game"},

            {title: "node.js", tag:"it"}

        ];

        collection.insert(list, function (err, result) {

            assert.equal(null, err);

            client.close();

        });

    }); 

});