Question

现在我正在将数据写入json文件并将其返回到要显示的html页面。现在我想和mongodb数据库做同样的事情。我尝试了一些东西，但它没有用。

app.get('/', function(req, res){
url = 'http://www.amazon.in/Sony-Xperia-Z3-Copper-32GB/dp/B010V448ZC/ref=pd_rhf_se_s_cp_6?ie=UTF8&dpID=419rmomR%2BjL&dpSrc=sims&preST=_SL500_SR135%2C135_&refRID=19RT23W7T48Z99XNT6GK';

request(url, function(error, response, html){
    if (!error) {
        var $ = cheerio.load(html)
        var json = {Product_Name : "", Brand : "", Color : "", Image : "", Price : "", Rating : ""};

        var P_name = $('#title').children().text();
        var brand = $('#brand').text();
        var color = $('.a-row').find('span.selection').text();
        var price = $('#price').find('span.a-size-medium').text();
        var rating = $('#averageCustomerReviews').find('span.a-icon-alt').text();
        var image = $('.imgTagWrapper').children().attr('src');

        /*json.Product_Name = P_name;
        json.Brand = brand.trim();
        json.Color = color.trim();
        json.Price = price.trim();
        json.Rating = rating.trim();
        json.Image = image.trim();

        fs.writeFile('output.json', JSON.stringify(json, null, 4), function(err){
            console.log('File successfully written! - Check your project directory for the output.json file');
        })*/


        var insertDocument = function(db, callback) {
           db.collection('proInfo').insertOne( {

                "Product_Name": P_name,
                "Brand":brand,
                "Color":color,
                "Price":price,
                "Rating":rating,
                "Image":image

           }, function(err, result) {
                assert.equal(err, null);
                console.log("Inserted a document into the proInfo collection.");
                callback(result);
          });
        };

        MongoClient.connect(url, function(err, db) {
          assert.equal(null, err);
          insertDocument(db, function() {
              db.close();
          });
        });

        res.send('Check your console!')
    } else {
        console.log("We’ve encountered an error: " + error);
    }
})
})

它在console.log中显示了一些错误

D：\ Hemanth \ Node Js \ web scraper \ node_modules \ mongodb \ lib \ url_parser.js：20 抛出新的错误（＆＃39;无效的架构，预期的mongodb＆＃39;）; ^

错误：架构无效，预期mongodb 在module.exports

有人可以帮我解决这个问题吗？

Answer 1

在节点js路由中使用模块导出，并在module.export中定义方法，如下所述：

module.export {}

然后调用该方法，在node应用程序下的server.js中应用路由：

erc(app, 
     {
      controllers: __dirname + '/routes',
      routes:{'/methodnametobecalled': { action: 'routesfilename#methodname'}
     }
});

Answer 2

初始化Mongoose和架构

var mongoose = require('mongoose');
mongoose.connect('mongodb://YOURVALUES.mongolab.com:11111/NAME');
var schema = new mongoose.Schema({ name: 'string', account: 'string', date: 'string' });
var accountz = mongoose.model('accountz', schema);

创建

var small = new accountz({ name: "SAMZ", account: "Monthly", date: "29/12/2015" }); small.save(function (err) { if (err){ console.log("Error in Save"); }else{ console.log("Save Sucessfully"); } });

<强>读取

accountz.find().exec(function(err, data){ if (err){ console.log("Error in Reading"); }else{ console.log("The value = " + data); } });

<强>更新

accountz.findOne({ "_id": "0023"}, function (err, doc){ doc.name = editObj.name; doc.account = editObj.account; doc.date = editObj.date; doc.save(function (err) { if (err){ console.log("Error in Updating"); }else{ console.log("Updated Sucessfully"); } }); });

删除

accountz.remove({ "_id": "0023"}).exec(function(err, data){ if (err){ console.log("Error in Deleting"); }else{ console.log("Deleting Sucessfully"); } });

参考此链接https://shiyamexperience.wordpress.com/2015/12/29/mongodb-crud-using-mongoose/

我想使用node.js将数据写入mongodb数据库

2 个答案: