When it comes to NoSQL databases, MongoDB is frequently cited as one of the best options. NoSQL databases, as opposed to traditional SQL databases, are known for their ability to work with large datasets, providing scalability and flexibility in app development. SQL databases, on the other hand, are relatively stiff and difficult to scale when dealing with large data sets.
In this article, we’ll look at 5 easy steps for the Angular MongoDB Database Integration.
Steps to Get Started with Angular MongoDB Integration
A stable and dependable MongoDB connection is essential when using Angular to construct a web application. This entails setting up the Angular MongoDB connection to provide smooth communication between the back-end MongoDB database and the front-end Angular framework for efficient data retrieval and manipulation. Take a look at the steps below to learn how to connect Angular with MongoDB.
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Step 1: Using the Angular CLI, Create a basic Angular 5 App
Install the Angular CLI in the terminal.
sudo npm install -g @angular/cli
- This command installs the Angular Command Line Interface (CLI) globally on your system using Node Package Manager (npm).
- The
sudo prefix grants administrative permissions needed for the installation.
- The
-g flag indicates that the package should be installed globally, making it available from any directory.
- The
@angular/cli specifies the package name, which provides tools for creating and managing Angular applications.
- After running this command, you can use Angular CLI commands like
ng new to generate new Angular projects.
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So far, we’ve installed the AngularJS Command Line Interface. It’s time to start working on the new Angular App.
Enter the following command:
ng new <name-of-the-app>
Now let’s change the directory to the directory of our app.
cd <name-of-the-app>
It’s time to put our Angular App to the test!
ng serve -o
Our browser displays the following page:
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Step 2: Let’s set up Express, Mongoose, and the body-parser
npm install express — save
npm install mongoose — save
npm install body-parser --save
- These commands install specific Node.js packages using npm (Node Package Manager) for your project.
npm install express --save installs the Express framework, which is used for building web applications and APIs.npm install mongoose --save installs Mongoose, a library for MongoDB that simplifies database interactions.npm install body-parser --save installs Body-Parser, middleware for parsing incoming request bodies in a middleware before your handlers.- The
--save flag adds these packages to your project’s package.json file, ensuring they are listed as dependencies.
Express is a web framework for routing and middleware that has very little functionality on its own and is essentially a series of middleware function calls.
In the application’s request-response cycle, middleware functions can access the request object (req), the response object (res), and the subsequent middleware function. To indicate the next middleware function, a variable named next is frequently used.
Mongoose facilitates the connection between the NodeJS app and the MongoDB database.
The Body-Parser middleware facilitates the parsing of incoming request bodies in a middleware prior to the execution of handlers that are accessed through the req.body property.
Step 3: Make a new file called server.js
In the text editor, open the server.js file.
We may utilize the packages we imported, as stated in lines 1-4. Lines 5–9 create a local instance of a MongoDB database. If a problem arises and the database is unable to establish a connection, we notify the user of the error. The headers are defined at lines 18–24.
The lines 26–31 help us define the structure of our database. We will just save the user’s name and address in our example, as they are both Strings. Lines 36–87 include the definitions of our API calls, which enable us get, store, edit, and remove user data from the database.
Step 4: Create a new Angular Service to call common AJAX APIs
Create a new Angular Service to call common AJAX APIs.
ng g s common -spec=false
- This command is used in Angular to generate a new service named
common.
- The
ng stands for Angular CLI (Command Line Interface), which helps automate tasks in Angular development.
- The
g is a shorthand for generate, indicating that you want to create a new file.
- The
-spec=false option disables the generation of a spec file, which is typically used for testing.
- As a result, this command creates a new service without the accompanying test file, streamlining the process for developers who may not need tests immediately.
Open src/app/common.service.ts and paste the following code there:
Finally, we update our app’s HTML to display the data!
Step 5: It’s time to put our app to use!
- Use mongod to launch a local instance of MongoDB.
- A couple of similar-looking commands appear on the terminal, and the pointer remains there, waiting for connections to the MongoDB Daemon to be established.
- Now, let’s try running our Angular App with the ng serve -o command.
Conclusion
You’ve learned how to create a basic CRUD application using Angular 5, Nodejs, Express, and the Angular MongoDB Integration.
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FAQ on Angular MongoDB Integration
Can I use MongoDB with Angular?
Yes, you can use MongoDB with Angular by creating a backend with Node.js that interfaces with MongoDB and serves data to your Angular application via RESTful APIs or GraphQL.
Can Angular directly connect to a database?
No, Angular cannot directly connect to a database. You need a backend service (like Node.js, Django, or Flask) to handle database operations and provide an API with which Angular can interact.
How to store data in MongoDB using Angular?
Create a backend service with Node.js and Express to store data in MongoDB using Angular. Use Mongoose to interact with MongoDB and create API endpoints that Angular can call to perform CRUD operations.
Can we use MySQL with Angular?
Yes, you can use MySQL with Angular by setting up a backend server (like Node.js, Django, or Flask) that connects to MySQL and serves data to Angular through RESTful APIs.
How to use MongoDB with NPM?
Install the MongoDB Node.js driver with npm install mongodb. Use it in your Node.js application to connect to MongoDB, perform CRUD operations, and handle database interactions.
Davor DSouza is a data analyst with a passion for using data to solve real-world problems. His experience with data integration and infrastructure, combined with his Master's in Machine Learning, equips him to bridge the gap between theory and practical application. He enjoys diving deep into data and emerging with clear and actionable insights.
