Learn how to build applications with FastAPI, React, and MongoDB in this FARM Stack course.

The FARM stack, which stands for FastAPI, React, and MongoDB, is a modern and powerful stack that combines the best technologies for building full-stack applications. FastAPI is a Python web framework that is known for its high performance and ease of use. React is a JavaScript library for building user interfaces, and MongoDB is a NoSQL database that is widely used for its flexibility and scalability. In this tutorial, we will walk you through setting up and building a full-stack application using the FARM stack.

Setting up the Backend with FastAPI and MongoDB:

1. Install FastAPI:
   To get started, you will need to install FastAPI. You can do this by running the following command in your terminal:

   pip install fastapi

2. Install MongoDB:
   Next, you will need to install MongoDB. You can follow the instructions on the MongoDB website to download and install MongoDB on your machine.

3. Set up a FastAPI project:
   Create a new directory for your FastAPI project and navigate into it. Create a new Python file called main.py and add the following code:

   
   from fastapi import FastAPI
   from pymongo import MongoClient

app = FastAPI()

client = MongoClient(‘mongodb://localhost:27017/’)
db = client[‘mydatabase’]
collection = db[‘mycollection’]

@app.get("/")
async def read_root():
return {"message": "Hello World"}

4. Start the FastAPI server:
To start the FastAPI server, run the following command in your terminal:
```bash
uvicorn main:app --reload

1. Test the FastAPI server:
   Open your browser and navigate to http://localhost:8000/ to test the FastAPI server. You should see the message "Hello World" displayed on the page.

Setting up the Frontend with React:

1. Install Node.js and npm:
   If you haven’t already, you will need to install Node.js and npm on your machine. You can download and install them from the Node.js website.

2. Create a new React project:
   Create a new directory for your React project and navigate into it. Run the following command in your terminal to create a new React project:

   npx create-react-app my-app

3. Change into the project directory:
   Navigate into the project directory by running the following command:

   cd my-app

4. Install Axios:
   To make HTTP requests from your React app, you will need to install the Axios library. You can do this by running the following command in your terminal:

   npm install axios

5. Create a component to fetch data from the FastAPI server:
   Create a new file called DataComponent.js in the src directory of your React project and add the following code:

   
   import React, { useState, useEffect } from 'react';
   import axios from 'axios';

const DataComponent = () => {
const [data, setData] = useState(null);

useEffect(() => {
    axios.get('http://localhost:8000/')
        .then(response => {
            setData(response.data);
        })
        .catch(error => {
            console.log(error);
        });
}, []);

return (
    <div>
        <h1>Data from FastAPI server</h1>
        {data && <p>{data.message}</p>}
    </div>
);

};

export default DataComponent;

6. Use the DataComponent in your main App component:
Open the `App.js` file in the `src` directory of your React project and import the `DataComponent`. Update the `App` component to include the `DataComponent` like this:
```javascript
import React from 'react';
import DataComponent from './DataComponent';

function App() {
    return (
        <div>
            <DataComponent />
        </div>
    );
}

export default App;

1. Start the React development server:
   To start the React development server, run the following command in your terminal:

   npm start

Testing the Full-Stack Application:
Now that you have set up the backend with FastAPI and MongoDB and the frontend with React, you can test the full-stack application. Open your browser and navigate to http://localhost:3000/ to see the data fetched from the FastAPI server and displayed in your React app.

In this tutorial, you have learned how to set up and build a full-stack application using the FARM stack. FastAPI provides a high-performance backend, React offers a powerful frontend, and MongoDB delivers a flexible database solution. By combining these technologies, you can build modern, scalable, and efficient full-stack applications. Experiment with different features and functionalities to enhance your application further. Happy coding!