1.1 Setting up Node.js<\/h3>\n
To set up Node.js<\/strong> on windows you will need to download the installer from this<\/a> link. Click on the installer (also include the NPM package manager) for your platform and run the installer to start with the Node.js setup wizard. Follow the wizard steps and click on Finish when it is done. If everything goes well you can navigate to the command prompt to verify if the installation was successful as shown in Fig. 1.<\/p>\n To start with the tutorial, I am hoping that you have the Mongo database up and running in your local environment. For easy use, I will set it up in the Docker<\/a> environment. You can use the below manifest file to get the container up and running in minutes. The file will also create an initial database named stack.yml<\/em><\/span><\/p>\n To execute or stop\/remove the manifest file you can execute the below commands.<\/p>\n Docker commands<\/em><\/span><\/p>\n If everything goes well the container would be started successfully as shown in Fig. 2 and you can use the To set up the application, we will need to navigate to a path where our project will reside. For programming stuff, I am using Visual Studio Code<\/a> as my preferred IDE. You’re free to choose the IDE of your choice. Navigate to the project directory and run package.json<\/em><\/span><\/p>\n To download the dependencies navigate to the directory path containing the file and use the We will define the Create a new folder called employee.js<\/em><\/span><\/p>\n In the root folder add the following content to the index.js<\/em><\/span><\/p>\n To run the application navigate to the project directory and enter the following command as shown in Fig. 2. If everything goes well the application will be started successfully on port number You are free to use postman<\/a> or any other tool of your choice to make the HTTP request to the application endpoints.<\/p>\n That is all for this tutorial and I hope the article served you with whatever you were looking for. Happy Learning and do not forget to share!<\/p>\n In this tutorial, we learned how to create a MongoDB on Docker and create simple Node.js RESTful APIs with an Express web server application to perform the CRUD operations. You can download the source code and the postman collection from the Downloads<\/a> section.<\/p>\n This was a tutorial to create a CRUD application in Node.js with MongoDB.<\/p>\n![\"node](\"https:\/\/www.javacodegeeks.com\/wp-content\/uploads\/2021\/07\/node-npm-installation-img1-1.jpg\")
<\/a>2. Setting up Mongo database on Docker<\/h2>\n
employeedb<\/code>.<\/p>\nservices:\n mongodb:\n image: mongo\n container_name: mongodb\n environment:\n MONGO_INITDB_DATABASE: employeedb\n ports:\n - \"27017:27017\"\nversion: \"3\"\n<\/pre>\n
-- start the container\ndocker-compose -f stack.yml up -d\n\n-- stop and remove the container\ndocker-compose -f stack.yml down\n<\/pre>\n
docker ps -a<\/code> command to confirm.<\/p>\n![\"node](\"https:\/\/www.javacodegeeks.com\/wp-content\/uploads\/2021\/07\/docker-run.jpg\")
<\/a>3. Node.js and MongoDB Tutorial<\/h2>\n
3.1 Setting up dependencies<\/h3>\n
npm init -y<\/code> to create a package.json<\/code> file. This file<\/a> holds the metadata relevant to the project and is used for managing the project dependencies, script, version, etc. Add the following code to the file wherein we will specify the required dependencies.<\/p>\n{\n \"name\": \"mongodb\",\n \"version\": \"1.0.0\",\n \"description\": \"nodejs and mongodb tutorial\",\n \"main\": \"index.js\",\n \"scripts\": {\n \"test\": \"echo \\\"Error: no test specified\\\" && exit 1\"\n },\n \"keywords\": [\n \"nodejs\",\n \"monogodb\",\n \"docker\",\n \"restapi\",\n \"express\"\n ],\n \"author\": \"c-danielatlas\",\n \"license\": \"MIT\",\n \"devDependencies\": {\n \"nodemon\": \"^2.0.11\"\n },\n \"dependencies\": {\n \"body-parser\": \"^1.19.0\",\n \"express\": \"^4.17.1\",\n \"mongoose\": \"^5.13.2\"\n }\n}\n<\/pre>\nnpm install<\/code> command. If everything goes well the dependencies will be loaded inside the node_modules<\/code> folder and you are good to go with the further steps.<\/p>\n3.2 Creating the model class<\/h3>\n
Employee<\/code> model in mongoose. Create a new folder called model<\/code> inside the root folder. Now create a file called employee.js<\/code> with the following content. This model will represent a collection in the mongo database.
employee.js<\/em><\/span><\/p>\nconst mongoose = require('mongoose');\n\nconst EmployeeSchema = mongoose.Schema({\n first_name: {\n type: String\n },\n last_name: {\n type: String\n },\n email_address: {\n type: String,\n required: [true, 'Email address is required']\n },\n phone_number: {\n type: String\n },\n date_of_joining: {\n type: Date,\n default: Date.now\n }\n});\n\nmodule.exports = mongoose.model('Employees', EmployeeSchema);\n<\/pre>\n3.3 Creating the routes file<\/h3>\n
routes<\/code> inside the root folder. Now create a file called employee.js<\/code> with the following content. The file will be responsible to handle the incoming HTTP requests from the client and perform the CRUD operations with the help of the mongoose model.<\/p>\nconst express = require('express');\nconst router = express.Router();\nconst Employee = require('..\/models\/employee');\n\n\/\/ submit employee details\nrouter.post('\/', (req, res) => {\n \/\/ todo - skipping request body validation for brevity\n\n \/\/ creating employee obj\n var employee = new Employee({\n first_name: req.body.first_name,\n last_name: req.body.last_name,\n email_address: req.body.email_address,\n phone_number: req.body.phone_number\n });\n\n employee.save()\n .then((response) => {\n res.status(201).json({ 'message': response });\n }).catch(err => {\n res.status(500).json({ 'message': err });\n });\n});\n\n\/\/ get back all employees\nrouter.get('\/', (req, res) => {\n Employee.find()\n .then(response => {\n res.status(200).json({ 'message': response });\n }).catch(err => {\n res.status(500).json({ 'message': err });\n });\n});\n\n\/\/ get back a single employee\nrouter.get('\/:id', (req, res) => {\n console.log('Searching id = %s', req.params.id);\n Employee.findById(req.params.id)\n .then(response => {\n if (!response) {\n res.status(404).json({ 'message': 'Resource not found' });\n } else {\n res.status(200).json({ 'message': response });\n }\n }).catch(err => {\n res.status(500).json({ 'message': err });\n });\n});\n\n\/\/ delete all employees\nrouter.delete('\/', (req, res) => {\n Employee.deleteMany()\n .then(response => {\n res.status(200).json({ 'message': response });\n }).catch(err => {\n res.status(500).json({ 'message': err });\n });\n});\n\n\/\/ delete an employee\nrouter.delete('\/:id', (req, res) => {\n console.log('Deleting id = %s', req.params.id);\n\n \/\/ todo - skipping find-by-id validation for brevity\n\n Employee.deleteOne({ _id: req.params.id })\n .then(response => {\n res.status(200).json({ 'message': response });\n }).catch(err => {\n res.status(500).json({ 'message': err });\n });\n});\n\n\/\/ update an employee\nrouter.patch('\/:id', (req, res) => {\n console.log('Updating id = %s', req.params.id);\n\n \/\/ todo - skipping find-by-id validation for brevity\n\n Employee.updateOne(\n { _id: req.params.id },\n { $set: { phone_number: req.body.phone_number } })\n .then(response => {\n res.status(204).json({ 'message': response });\n }).catch(err => {\n res.status(500).json({ 'message': err });\n });\n});\n\nmodule.exports = router;\n<\/pre>\n3.4 Setting up Express webserver<\/h3>\n
index.js<\/code> file.<\/p>\nconst express = require('express');\nconst app = express();\nconst bodyParser = require('body-parser');\nconst mongoose = require('mongoose');\n\n\/\/ parsing request of content-type as application\/json\napp.use(bodyParser.json());\n\n\/\/ import routes\nconst employeeRoutes = require('.\/routes\/employees');\napp.use('\/employees', employeeRoutes);\n\n\/\/ connect to db\nconst DB_CONNECTION = 'mongodb:\/\/localhost:27017\/employeedb';\nmongoose.connect(DB_CONNECTION, { useNewUrlParser: true, useUnifiedTopology: true })\n .then(() => {\n console.log('connected to db');\n }).catch(err => {\n console.log('error while connecting to db', err);\n });\n\n\/\/ start app\nconst PORT = process.env.port || 3000;\napp.listen(PORT, () => {\n console.log(`Server started on port ${PORT}`);\n});\n<\/pre>\n4. Run the Application<\/h2>\n
3000<\/code>.<\/p>\n![\"node](\"https:\/\/www.javacodegeeks.com\/wp-content\/uploads\/2021\/07\/code-run-1.jpg\")
<\/a>5. Demo<\/h2>\n
\/\/ submit employee details\n\/\/ HTTP post\n\/\/ Sample request body -\n\/\/ {\n\/\/ \"first_name\": \"John\",\n\/\/ \"last_name\": \"Doe\",\n\/\/ \"email_address\": \"john.doe@example.com\",\n\/\/ \"phone_number\": \"1234567890\"\n\/\/ }\nhttp:\/\/localhost:3000\/employees\/\n\n\/\/ get all employees\n\/\/ HTTP get\nhttp:\/\/localhost:3000\/employees\/\n\n\/\/ get a single employee\n\/\/ HTTP get\nhttp:\/\/localhost:3000\/employees\/60e9b70dbe4c540fa4c3bb21\n\n\/\/ update a single employee\n\/\/ HTTP patch\nhttp:\/\/localhost:3000\/employees\/60e9bea87f9c4640f0b27617\n\n\/\/ delete a single employee\n\/\/ HTTP delete\nhttp:\/\/localhost:3000\/employees\/60e9bea87f9c4640f0b27617\n\n\/\/ delete all employees\n\/\/ HTTP delete\nhttp:\/\/localhost:3000\/employees\/\n<\/pre>\n6. Summary<\/h2>\n
<\/a>7. Download the Project<\/h2>\n