Initial Commit

Author: martandsingh

.gitignore

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+node_modules/

README.md

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+<h2>NodeJsWithMongoDb</h2>
+<h3>Scope</h3>
+<p>This tutorials explains how to create REST api using express js, node js & mongodb.
+After this tutorial you will be able to create basic get and post REST api services using
+node & mongo.<br/>
+Put, Patch method will be updated soon in the same tutorials</p>
+
+<h3>What is gulp?</h3>
+<p>Gulp is basically a watcher. If you perform any change to your application, then you 
+have to stop and restart service again and again. Gulp takes this reponsibility for you.
+It watches if there is some changes in your application and rebuild it automatically.
+You can review gulp settings in gulpfile.js</p>
+
+<h3>What is bookModel.js?</h3>
+<p>This file is a structure of your mongodb document. It should be same as mongodb document structure. You can relate it with entity framework in .Net.</p>
+
+<h3>How to run?</h3>
+<p>Download repository or clone it using git bash. Navigate to folder in command prompt(windows).
+Then run "npm install" to download dependencies. After that "node app.js".
+Congrats...your service is active now.</p>
+
+<h2>Happy to server you....Thanks</h2>

app.js

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+/**This is a basic tutorial to explain how we can make get and post services using
+ * express js for node and mongo. mongo is a document based (nosql) database, where 
+ * your records(called document) are saved in form of bson(binary json). Like SQL server &
+ * oracle and other rdbms it does not allow you to make relations so it is simpler and faster.
+ * by default mongo runs on port no 27017(though this can be changed form system to system).
+ * To test your get/post method os services you can use postman, fiddler and many other
+ * free tools are availaible.
+ * 
+ * Author : Martand Singh
+ * Date: 01 June 2018
+ * Scope : Node Rest Api using Express Js and mongodb as backend.
+ * Email: [email protected]
+ */
+
+const express  = require('express');
+const app = new express();
+
+//mongoose is used for mongo connection
+const mongoose = require('mongoose');
+
+//this is the model of your book, which should be same as mongo document.
+const Book  = require('./models/bookModel');
+
+//mongodb connection. admin is the name of database
+const db = mongoose.connect('mongodb://localhost/admin');
+
+//body parse basically read your request and if there is some json then it puts in your request body
+const bodyParser  = require('body-parser');
+
+// if you have set an environment the it will take port no already set in env otherwise 3000.
+//in our case we have set enviornment in gulpfile.js where port no is 8000. So our application
+//will work on 8000 port.
+const port  = process.env.PORT || 3000;
+
+//here we are creating a router for book.
+var bookRouter = express.Router();
+
+app.use(bodyParser.urlencoded({extended:true}));
+app.use(bodyParser.json()) //we will use json body parser
+
+///books route created. book 
+bookRouter.route('/books') //books is basically your collection name in mongodb
+//defining post request
+.post(function(req, res){
+    var _book = new Book(req.body);
+    _book.save();
+    console.log(_book);
+    res.status(201).send(_book); //201 status for created
+})
+//defining get request
+.get(function(req, res){
+    var query = {};
+
+    //here we are checking if query string name is genre then only we will filter the data.
+    if(req.query.genre){
+        query.genre = req.query.genre;
+    }
+    //here we are checking if query string name is author then only we will filter the data.
+    if(req.query.author){
+        query.author = req.query.author;
+    }
+    
+   Book.find(query, function(err, books){
+       if(err){
+            res.status(500).send(err); //here we are sending response status code also. as 500 means internal server error.
+       }
+       else{
+           res.json(books);
+       }
+   });
+});
+
+// here we are defining a route to find a book with its it.
+//e.g: http://localhost:8000/api/books/5b10402e453bd55322440e89
+bookRouter.route('/books/:bookid')
+.get(function(req, res){
+   
+   Book.findById(req.params.bookid, function(err, book){
+       if(err){
+            res.status(500).send(err);
+       }
+       else{
+           res.json(book);
+       }
+   });
+});
+
+
+
+app.use('/api', bookRouter);
+
+app.get('/', (req, res) => {
+    res.send('welcome to get service');
+});
+
+app.listen(port, function() {
+    console.log('GULP is running my server on PORT: '+port);
+});

gulpfile.js

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+const gulp = require('gulp'),
+nodemon = require('gulp-nodemon');
+
+gulp.task('default', function(){
+    nodemon({
+        script : 'app.js',
+        ext: 'js',
+        env: {
+            PORT: 8000
+        },
+        ignore: ['./node_modules/**']
+    }).on('restart', function(){
+        console.log('server restarting...');
+    });
+});

models/bookModel.js

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+const mongoose = require('mongoose'),
+Schema = mongoose.Schema;
+
+var bookModel = new Schema({
+    title: {
+        type: String
+    },
+    author: {type: String},
+    genre: {type: String},
+    read: {type: Boolean}
+});
+
+module.exports = mongoose.model('Book', bookModel);