mongoose update

Tags: model number res workaround why turn art description functionFirst, define a goods (commodity) of the models varMongoose = require ('Mongoose'); varSchema =Mongoose. Schema; varProductschema =NewSchema ({"productId": String,"Producname": String,"Saleprice": Number,"productimage": String}); Module.exports=mongoose.model ("Good", Productschema,'Goods'); Two, in the definition of a users (user) models va

1, NPM start error, prompt port occupancyApp.js added App.listen (3000), delete can2. Skip to HTML pageEjs changed to Htmlapp.engine ('. html ', require (' Ejs ') __express); App.set (' View engine ', ' html ');Discover Route index.js file Add route router.get ('/login ', function (req, res, next) {Res.render (' login ', {title: ' Login '})3, the data is not queriedThe user collection does have data, but the query does notBased on the information collected online, try to save a piece of data and

For example, my code database code can be divided into Chinese and English sites. Each table has a site_code field to distinguish, The two sites are deployed on different people servers. In this case, we will use system environment variables to differentiate them, Set the environment variables in Mac Vim ~ /. Bash_profile Add a line of code export site_code = 'cn' In UNIX, run the export site_code = 'cn' command on the terminal. Enter the following command once after setting in Mac to see

Recently, you need to implement an HTTP service function in your project. Although you can implement HTTP sending and parsing by encapsulating the socket itself. However, considering that the network still has a large number of HTTP parsing source code, their own to achieve a little bit of trouble from scratch. So on the network to a lot of, see many implementation of HTTP code, no one does not reflect its lightweight features. However, although lightweight, in terms of the amount of code, for a

Create a connection using the Mongoose.connect () methodMongoose.conect (' Mongodb://localhost/myapp ');The above code is linked to the MyApp database of MongoDB via the default port 27017. We can also set some specific parameters for the URL:Mongoose.conect (' Mongodb://username:[email protected]:p ort/databasename?options ... ');OptionsThe Connect method can accept an options objectMongoose.connect (URI, options);Here is the Options key DB-Set which database to connect to Server-S

' 1234567890 ' New mongostore url:config.db, ' sessions 'app.routeris the enhanced version of Connect router, which is used to process, and so on, the app.get app.post request processing settings, the corresponding function is called when the browser accesses the corresponding URL in these settings express.router . If it is not explicitly called, app.use(app.router) Express will be app.get(...) implicitly called when the first encounter such a setting, so this can no

If a document has a field of type string array, such as {id:1,tags:[' AA ', ' BB ', ' cc '}, now to change the ' BB ' of the tags field to ' bb ', the previous way is to write:Articlemodel.find ({tags:{$all: [Doc.name]}},function(err,articles) {Articles.foreach (function(article) { for(varj = 0;j){ if(Article.tags[j] = = =doc.name) {Article.tags[j]=Req.body.name; Article.markmodified (' Tags '); Article.save (); Break; }

data, enter the use gabdb db.user.insert ({dataid : 10001}) Db.user.find () Switch to the From node, you will find that using show DBS will error, because you have not opened the permission, enter Rs.slaveok (), can be successfully accessed. 　　 Switch from node MONGO localhost:10002 //no permission Query show DBS //error 2016-01-06t14:48:53.155+0800 E query [ THREAD1] error:listdatabases failed:{"OK": 0, "errmsg": "Not Master and Slaveok=false", "Code": 13435}: //Open gabriel:seconda

The specific code looks like this: var express = require (' Express '); var mongoose = require (' Mongoose '); var router = Express. Router (); var person = Mongoose.model (' person ', { id:number, name:string }); /* Add/* router.get ('/insert ', function (req, res) { var student = new Person ({ id:1, name: "Huop" }); Mongoose.connect ("Mongodb://localhost:27017/test"); Student.save (funct

Tags: informationProduct table var Mongoose = require(‘mongoose‘); var Schema = Mongoose.Schema; var Product = new Schema({ image : { type : String }, description : { type : String }, price : { type : Number, require : true }, probability : { type : Number,

(Error,doc) {if (error) {Console.log (error);} else {console.log (doc);}});　　Data UpdateLearn the preservation of data, and then we begin to learn to update the data it!1. Example: obj.update (query condition, update object, callback);var conditions = {name: ' Test_update '}; var update = {$set: {age:16}}; Testmodel.update (conditions,

GitHub Address: Https://github.com/linguowei/myblogClone the project Git down;Analysis:# git clone https://github.com/linguowei/myblog.git# cd myblog# npm install# npm run build# CD admin # NPM Run build#. CD.. /# node app.js# localhost:7000# localhost:7000/adminRun the code;Install dependent packages here, as well as package build background projects and foreground projects# node app for running servicesApp.jsWhich is connected to the data:App.use (Router)Database connection + set up various ta

Build the Dumall database, create goods collections, import data files, or manually insert them yourself. MongoDB Installation and Environment building: http://www.cnblogs.com/ccyinghua/p/7887713.html to create a database and insert data, you can enter the MONGO operations database, insert operations in command line form, That is, after the successful start of MongoDB, as an administrator to open a command line window input MONGO, you can do some database operations, you can also download mongov