How do you fetch data from mongodb and display in react?
There are many ways that you can query to get data from your API server. so here I am trying to describe two of them. Show
1. By native browser
2. by This will give you more synchronized handling like First, at the top level of your
Then your First of all, we can not connect React JS to MongoDB because things don’t work like this. First, we create a react app, and then for backend maintenance, we create API in node.js and express.js which is running at a different port and our react app running at a different port. for connecting React to the database (MongoDB) we integrate through API. Now see how we create a simple React app that takes the input name and email from users and saved it to the database. Prerequisite:
Setum Files and Folders: Setting up the required files and folders for the frontend and backend both one by one.
Step 1: Create a react application using the following command npx create-react-app foldername Step 2: Once it is done change your directory to the newly created application using the following command cd foldername Step to run the application: Enter the following command to run the application. npm start Backend Setup With NodeJS: Setup NodeJs for Backend to integrate with frontend. Step1: Make a folder in the root directory using the following command mkdir backend Step 2: Once it is done change your directory to the newly created folder called backend using the following command cd backend Step 3: Run the following command to create configure file npm init -y Step 3: Now Install the mongoose MongoDB using the following command. npm i express mongoose mongodb cors Step 4: Create a file that is index.js touch index.js Project Structure: It will look like the following: Step to run the application: Enter the following command to run the application. nodemon index.js Example: Now write down the following code in the following files:
You will need access to the MongoDB Atlas database for this tutorial. If you don't have an account you can sign up free to follow along. This tutorial will show you how to build a full-stack MERN application—in this case, an employee database—with the most current tools available. Before you begin, make sure that you are familiar with Node.js and React.js basics and have Node and Create React App installed. You will also need access to the MongoDB Atlas database for this tutorial. The full code is available on this GitHub repo. What is the MERN Stack?The MERN stack is a web development framework made up of the stack of MongoDB, Express.js, React.js, and Nodejs. It is one of the several variants of the MEAN stack. When you use the MERN stack, you work with React to implement the presentation layer, Express and Node to make up the middle or application layer, and MongoDB to create the database layer.In this MERN stack tutorial, we will utilize these four technologies to develop a basic application that is able to record the information of employees and then display it using a React. How to Get Started with the MERN StackTo get started, you will need to do the following:
Setting Up the Project(Feel free to code along or to download the full code from this GitHub repo.) MERN lets us create full-stack solutions. So, to leverage its full potential, we will be creating a MERN stack project. For this project, we will create both a back end and a front end. The front end will be implemented with React and the back end will be implemented with MongoDB, Node, and Express. We will call the front end client and the back end server. Let’s start by creating an empty directory: mern. This folder will hold all our files after we create a new project. Then we will create a React app—client—in it.
Then, we create a folder for the back end and name it server.
We will jump into the server folder that we created previously and create the server. Then, we will initialize package.json using npm init.
We will also install the dependencies.
The command above uses a couple of keywords:
We can check out installed dependencies using the package.json file. It should list the packages along with their versions. After we have ensured that dependencies were installed successfully, we create a file called server.js with the following code.: mern/server/server.js
Here, we are requiring express and cors to be used. const port process.env.port will access the port variable from the config.env we required. Connecting to MongoDB AtlasIt’s time to connect our server to the database. We will use MongoDB Atlas as the database. MongoDB Atlas is a cloud-based database service that provides robust data security and reliability. MongoDB Atlas provides a free tier cluster that never expires and lets you access a subset of Atlas features and functionality. Follow the Get Started with Atlas guide to create an account, deploy your first cluster, and locate your cluster’s connection string. Now that you have the connection string, go back to the ‘server’ directory and create a ‘config.env’ file. There, assign the connection string to a new mern/server/config.env
Create a folder under the server directory—db—and inside it, a file—conn.js. There we can add the following code to connect to our database. mern/server/db/conn.js
Server API EndpointsDatabase done. Server done. Now it's time for the Server API endpoint. Let's start by creating a routes folder and adding record.js in it. Navigate back to your “server” directory and create the new directory and file:
The routes/record.js file will also have the following lines of code in it. mern/server/routes/record.js
If you run the application at this point, you will get the following message in your terminal as the connection establishes.
That’s it for the back end. Now, we will start working on the front end. Setting Up the React ApplicationAs we have already set up our React application using the create-react-app command, we can navigate to the client folder and check our React application code. Let’s flesh out the application, but before we do, we need to install two additional dependencies that will be used in our project. Open a new terminal
emulator, navigate to the “client” directory, and install
Setting Up the React RouterLet's start by emptying the src folder and adding two new files in it: index.js and App.js.
Inside src/index.js, we add the following code: mern/client/src/index.js
We have used Creating ComponentsAfter adding the code to index.js files, we will create a components folder inside src. For each component we create, we will add a new .js file inside the components folder. In this case, we will add create.js, edit.js, navbar.js, and recordList.js.
A snapshot of each file would look like the following. create.jsThe following code will serve as a creating component for our records. Using this component, users can create a new record. This component will submit a create command to our server. mern/client/src/components/create.js
edit.jsThe following code will serve as an editing component for our records. It will use a similar layout to the create component and will eventually submit an update command to our server. mern/client/src/components/edit.js
recordList.jsThe following code will serve as a viewing component for our records. It will fetch all the records in our database through a GET method. mern/client/src/components/recordList.js
navbar.jsIn the navbar.js component, we will create a navigation bar that will link us to the required components using the following code. mern/client/src/components/navbar.js
Now, we add the following to the src/App.js file we created earlier. mern/client/src/App.js
Connecting the Front End to the Back EndWe have completed creating
components. We also connected our React app to the back end using
Similarly, in edit.js, we appended the following code to the onSubmit(e) block.
We also placed the following block of code to edit.js beneath the constructor block.
Lastly, we have recordList.js. recordList.js fetches the records from the database, so we will be using fetch's get method to retrieve records from the database. To achieve this, we added the following lines of code above the recordList() function in recordList.js.
After closing everything, to start the app, follow these steps.
This is what the landing page of the record component will look like after we added two records for “Richard” and “Billy” via the “Create Record” button. This is what the screen that lets you add an employee will look like. Congratulations on building your first MERN application. For more ideas and advanced concepts, visit our Developer Hub or follow this MERN workshop to take a basic MERN To-Do app through to a fully managed, auto-scaling application. Get started freeLearn more How do you display data from MongoDB in react?how to sent react from data in mongodb. app. post('/stored', (req, res) => {. console. log(req. body);. db. collection('quotes'). insertOne(req. body, (err, data) => {. if(err) return console. log(err);. res. send(('saved to db: ' + data));. How do you fetch data from MongoDB in node JS and display in react JS?How to Fetch Data From mongodb in Node js and Display in HTML (ejs). Step 1 – Create Node Express js App.. Step 2 – Install express flash ejs body-parser mongoose dependencies.. Step 3 – Connect App to MongoDB.. Step 4 – Create Model.. Step 5 – Create Routes.. Step 6 – Create HTML Table and Display List.. How do I display fetched data in react?This is Super easy I assuming that we are in a folder named django-react-app First, create a react app. Open your terminal and type npx create-react-app my-react 2…. Create a React state variable to hold data. ... . Make the API request and store the data. ... . Render and returned or you can say display the API data.. How do you fetch data from database in node JS and display in react?How to Fetch & Display Data From MySQL Database in Node js Express. Step 1 – Create Node Express js App.. Step 2 – Create Table in MySQL Database and Connect App to DB.. Step 3 – Install express flash ejs body-parser mysql Modules.. Step 4 – Create HTML Markup Form.. Step 5 – Import Modules in App.js and Create Routes.. |