connect to mongodb mongoose

}, {collection: "accounts"} ); var User = mongoose.model('accounts', userSchema); User.findOne({name:"WangEr"}, function(err, doc){ if(err) console.log(err); else console.log(doc.name + ", password - " + doc.password); }); var lisi = new User({name:"LiSi", password:"123456"}); lisi.save(function(err, doc){ if(err)console.log(err); else console.log(doc.name + ' saved'); }); }); In the preceding file, run the "node mongo. js" command to view the effect. To use

MongoDB operation, which encapsulates some commonly used methods such as MongoDB's addition and deletion to document, so that Nodejs operation MongoDB database becomes more flexible and simple. 2. What can mongoose do? Mongoose, because it encapsulates the usual processing method for

related purpose Document: A document is a set of key-value pairs. File dynamic mode. Dynamic mode refers to documents in the same collection that do not require a collection of common fields that have the same field or structure group, and can accommodate different types of data. The table given below shows RDBMS terminology using MongoDB relationships　　The most important thing to observe is that the tables and fields in our relational datab

be executed in an asynchronous environment. At the same time, it is also an object model library for MongoDB operations, which encapsulates some common methods such as MongoDB's addition and deletion of documents, and makes it easier for Nodejs to manipulate MongoDB database.• Installation MongooseNPM Install Mongoose• Reference Mongoosevar

Tags: packaging username font database Image Nodejs Mic Install valueMongoDB Introduction: MongoDB is a JavaScript-based database, the storage format is JSON, and node is a JavaScript-based environment (library), so node and MongoDB collocation can reduce the time and space cost of data conversion. Mongoose Introduction: is a

('mongodb://localhost/accounts'); vardb =mongoose.connection; Db.on ('Error', Console.error.bind (console,'Connection Error:')); Db.once ('Open', function () {Console.log ('Mongoose opened!'); varUserschema =NewMongoose. Schema ({name:{type:string, unique:true}, Password:string}, {collection:"accounts"} ); varUser = Mongoose.model ('accounts', Userschema); User.findone ({name:"Wanger"}, function (Err, do

}, {collection: "Accounts"} ); var User = Mongoose.model (' accounts ', Userschema); User.findone ({name: "Wanger"}, Function (Err, doc) { if (err) console.log (err); else Console.log (doc.name + ", password-" + Doc.password); }); var lisi = new User ({name: "Lisi", Password: "123456"}); Lisi.save (function (err, doc) { if (err) console.log (err); else Console.log (doc.name + ' saved '); }); The above file, you can view the effect directly by executing the node m

: var mongoose = require(‘mongoose‘); mongoose.connect(‘mongodb://localhost/accounts‘); var db = mongoose.connection; db.on(‘error‘, console.error.bind(console, ‘connection error:‘)); db.once(‘open‘, function() { console.log(‘mongoose opened!‘); var userSchema = new mongoose.Schema({ name:{type: String, uniqu

Data model and Base operation templateIn order to make the engineering structure clear, the establishment of data Model (SCHEMA) and the base operation template of adding and deleting and modifying are named as collection in database design (corresponding to the table definition in relational database) and stored in the Models folder.Creation of schema and model:Schema is the data schema in mongoose, which can be understood as the table structure defi

Document: A document is a set of key-value pairs. File dynamic mode. Dynamic mode refers to documents in the same collection that do not require a collection of common fields that have the same field or structure group, and can accommodate different types of data. The table given below shows RDBMS terminology using MongoDB relationships The most important thing to observe is that the tables and fields in our relational database are replace

Using mongoose allows us to better use the MongoDB database without having to write tedious business logic. Installation NPM Install Mongoose Initialize the use ofbefore using mongoose, you need to install node and MongoDB, which do not talk about node and

ObjectiveAfter reading the node. JS actual combat, which in the data storage section mentioned Redis, Mongodb, I myself also wrote a few simple demo according to the book introduction, in the demo process first encountered the problem is the data type and common curd. The common operation of MongoDB is in two ways, one is to use the API directly, and it is equivalent to using T-SQL to write SQL statements t

Label:In traditional projects, we often use caching to optimize database reads, such as in Java, where we take advantage of Spring's AOP capabilities to increase caching operations before reading and writing databases. Similar problems still exist in node and MongoDB projects, this article refers to the Mongoose-redis-cache plugin. Https://github.com/conancat/mongoose