Based on node. JS Platform MongoDB Development--mongoskin (by Vczero)

One, nonsensefrom January 13 to the development of MongoDB, the development of tourism labeling services, micro-blog Tag search system, Map services, web App services ... A scenario using MongoDB was transferred from the. NET, Java environment to the node. JS platform. The more you find that node. js and MongoDB feel good. It feels like MongoDB and node. js are a natural pair. Indeed, the client of MongoDB is the parsing engine of JS. Therefore, it is also nice to choose MongoDB and node. js for product prototypes. Online, met netizens asked MongoDB development, choose which driver best, has always been the use of native driver, but write up code there are a lot to note, such as the closing operation of the connection and so on ... Therefore, I recommend the use of Mongoskin in the node. JS development environment. Ii. A few concepts to be said(1) database: Same as relational database. (2) Collection: A table in a relational database. (3) Document: The record of the analogy relational database is actually a JSON object. (4) Database design: Consider NoSQL design, discard relational data design idea; in fact, the design of NoSQL database is profound and need to be practiced continuously in the project. (5) User system: Each database has its own administrator, you can use dbname; Db.adduser (' root_1 ', ' test ');(7) We recommend changing the external port(8) Start the service (this is under Win, Linux slightly modified): mongod--dbpath "xx\mongodb\data\db"--logpath "Xx\mongodb\log\mongo.log"--logappend-auth--port 7868 Iii. Building MongoDB infrastructure for development(0) npm install Mongoskin installation MongoskinThe installation, package, and other mechanisms of node. JS are not described here. (1) Create configuration file Config.json　　

{    "dbname": "Test",    "port": "7868", "    Host": "127.0.0.1",    "username": "Test",    "password": "Test" }

(2) Creating Util related classes Mongo.js: Exporting a DB object

1 varMongoskin = require (' Mongoskin ')),2Config = require ('./... /config.json ');3 4 /*5 * @des: Export database connection Module6  * */7Module.exports = (function(){8     varHost =Config.host,9Port =Config.port,TenDbName =Config.dbname, OneUserName =Config.username, APassword =Config.password, -str = ' mongodb://' + userName + ': ' + password + ' @ ' + host + ': ' + port+ '/' +DbName; -  the     varoption = { -Native_parser:true -     }; -  +     returnmongoskin.db (str, option); -})();

(3) Building a crud base class: To reduce duplicate curd code, you only need to pass in the relevant JSON object to

vardb = require ('./mongo.js ')), Status= require ('./status ')), Mongoskin= Require (' Mongoskin ');varCRUD =function(collection) { This. Collection =collection; Db.bind ( This. collection);}; Crud.prototype= {    /** @des: Create a record * @model: Inserted record, JSON-formatted model * @callback: Callback, return insert successful record or failure message * **/Create:function(model, callback) {db[ This. Collection].save (model,function(Err, item) {if(err) {returncallback (Status.fail); } item.status=Status.success.status; Item.message=Status.success.message; returncallback (item);    }); },    /** @des: Read a record * @query: query criteria, JSON literal for MONGO query * @callback: Callback, return a compliant record or failure message * **/read:function(query, callback) {db[ This. Collection].find (query). ToArray (function(err, items) {if(err) {returncallback (Status.fail); }            varobj ={status:status.success.status, message:status.success.message, items:            Items}; returncallback (obj);    }); },    /** @des: Update a record * @query: query criteria, JSON literal for MONGO query, _ID * @updateModel: Model with JSON format to update * @callback: Return success or failure information *    * */Update:function(query, Updatemodel, callback) {varSet ={Set:updatemodel}; db[ This. Collection].update (query, set,function(err) {if(err) {returncallback (Status.fail); }Else{                returncallback (status.success);    }        }); },    /** @des: Delete a record * @query: query criteria, JSON literal for MONGO query * @callback: Returns information of failure or success * **/DeleteData:function(query, callback) {db[ This. Collection].remove (Query,function(err) {if(err) {returncallback (Status.fail); }            returncallback (status.success);    }); }};module.exports= CRUD;

(4) Build Status.json, because need some status to indicate success and failure, later can be extended to CAPTCHA error, SMS verification error, user name error, etc.

Module.exports = {    /** Success Status * **/success: {Status:1, message:' OK '    },    /** Failure Status * **/fail: {status:0, message:' FAIL '    },    /** Two input passwords are inconsistent **/Repeatpassword: {status:0, message:' Two input passwords are inconsistent '    } };

Iv. inserting a piece of data using a crud

var user = {    ' Shangui ballad ',    password:  ' SGAGHAHSWJWH (after MD5) 'function  (data) {            if  (data.status) {                return  res.send ( status.success);            }             return res.send (Status.fail);});

Based on node. JS Platform MongoDB Development--mongoskin (by Vczero)