mongoose legion

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

First:create counter collection in MongoDB:> Db.counters.insert ({_id: "EntityId", seq:0})Writeresult ({"ninserted": 1})Then put below in a model.js:var Counterschema = Schema ({_id: {type:string, required:true},Seq: {type:number, default:0}});var counter = Mongoose.model (' counter ', Counterschema);var Entityschema = Mongoose. Schema ({TestValue: {type:string}});Entityschema.pre (' Save ', function (next) {var doc = this;Counter.findbyidandupdate ({

Remember the following points before you begin validation defined in SchemaType Validation is an internal middleware Validation occurs before document is to be save Validation does not occur on null values unless the corresponding field is added with required validator You can customize the validator Built-in Validator All SchemaType have required validators. Number has min and Max validators String has enum and match validator Custom Validator

The restfull routes are as follows:Router.get ('/:id ', controller.show);The Mongoes code is as follows:function (req, res) { function ( err, notice){if(err) { Res.json ({no: 0,msg: ' Get failed: ' +err} '; } Else { var result = {no:1}; Result.obj=notice; Res.json (result); } );};Client Access:Http://192.168.0.165:9000/api/notices/11The printing results are as follows;{"no": 0,"msg": "Get failed: Casterror:cast to ObjectId failed for value \" 11\ "at path \" _id\

Label:Nodejs operation MongoDB can use Mongoose:Mongoose is a MongoDB object modeling tool designed to work in an asynchronous environment.Install Mongoose:NPM Install MongooseGet MongoDB Connectionvar conn = mongoose.connect (' mongodb://localhost/mytest ');var Schema = Mongoose. Schema, ObjectId = Schema.objectid;var person = new Schema ({Title: {type:string}, age: {type:number, Min:5, max:20}, Meta: {Likes: [String], Birth: {type:date}}});var p = m

1 Installing MongooseNPM Install MongooseInstallation Successful2. Open the DatabaseMongod--path E:\mongoSuccessCreate a Db.jsvar mongoose = require (' Mongoose '); Mongoose.connect (' Mongodb://127.0.0.1:27017/whhhh ', {usemongoclient:true}); var db = Mongoose.connection;db.on (' Error ', Console.error.bind (console, ' connection error: '));d b.once (' Open ', function ( Callback) { console.log ("databa

(-?-;), the weekend is really fast ah, a long time ago saw Imooc on a personal movie site, a two-period video, the two weeks House home to play nothing dry, I also learned to build a, these things are the basis, as long as the time is very studious, Nodejs This stuff is light weight, where is uncomfortable.　　If you learn to write, you can learn: Express New Project Express comes with the use of the Jade template engine Express's routing Management Rights Management in Expres

This article is mainly to learn Scott's building a site introduction one of the study notes. 1. Build the Environment Using the node's NPM tool for the frames or classes that need to be used at the front and rear of the installation, the framework used to build the movie site is as follows: Back end: (Install with NPM) Mongoose: Tools for quick modeling of MongoDB Mongodb:nosql Database Jade: client's template engine Moment.js: Date format Front End:

Reading this article requires a basic knowledge of MongoDB in Nodejs to operate the MONGO database first understand a few concepts: MongoDB and MONGOOSEMONGODB package is a driver to provide a program to operate the MongoDB database Mongoose package is based on MongoDB built an object operation Model, which is suitable for the more important three concepts in Nodejsmongoose: Schema, which defines the structure of the database, such as the data type of

Nodejs+express+ejs+mongoose instancesNodejs learning is extremely painful, here will learn something to do a tidy, is self comfort it. According to the online Todo example, with Express and Mongoose rewrite part of the code, mainly business logic this piece (CRUD), this is no difficulty. The problem that has not been solved at present is: Express cannot use Ejs layout template, check for a long time did not

As for Wikipedia, the original address: Http://en.wikipedia.org/wiki/Mongoose_ (web_server)Mongoose is a cross-platform Web server. Originated from Cesanta software company.Mongoose is built on top of mongoose embedded libraries. The Mongoose Library is used to perform restful architecture services, serve the network graphical user interface on embedded devices,

Label:Node through the mongoose to realize the deletion and modification of MongoDB New File Test.jsThe contents are as follows:var mongoose = require (' Mongoose ') , Schema = Mongoose. Schema; Mongoose.connect (' mongodb://localhost/test '); var blogschema = new Schema ({ id : {type:number, index:true}

---restore content starts---Development using Webstorm 9New nodejs+express project NewfarmerArticle Directory Configure Mongoose Creating Directories and files Insert data, Post commit JSON add a record Query data, remove newly added records 1. Configure MongooseIncrease the class library of MongooseNPM Install Mongoose--save2. Creating Directories and filesIn the models directory,

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; }

Recently developed too busy, there is no time to update the blog, want to use this blog to summarize the relevant experience, in case the following can be used:First, Antd1.onChange of undefined problem: it is possible that the form in the page has the same name, or the parent element of the time-out form does not have a unique key set.Wait for update ...Second, ES6Wait for update ...Third, Mongoose1. When querying, if you encounter an association relationship that queries multiple tables, you c

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

This article transferred from: http://www.cnblogs.com/jaxu/p/5595451.htmlUsing MongoDB in node. JS is a mongoose. Suppose there is a definition of the following mongoose schemas:var New Mongoose. Schema ({ biz:string, name:string, tradetype:string, totalfee:number, transactionid:string, createtime: { type:date, default: Date.now

[question]mongoose How to implement statistical query, correlated queryPosted 4 year ago author a272121742 13,025 viewsRecently put forward a demand for business, request to do statistics, we design the document set, the statistics may cross the document will be more, want to ask, mongoose can achieve statistical query and related query? For example, the student Document object has a subject Document object