Using React With Django To Create An App: Tutorial - LogRocket Blog

Editor’s note: This post was updated on 15 July 2022 to reflect the most recent versions of React and Django, as well as to add information about how to send data between React and Django.

Django is one of the most complete web development frameworks available. It’s fast, secure, and scalable. With the power of Python, we can get an application up and running in just about no time. It manages everything, from the database to the final HTML sent to the client.

However, with the advent of single-page applications (SPAs), it’s become increasingly common to create applications that use Django only to provide an API that responds to JSON data consumed by applications developed in the most varied JavaScript frameworks.

This architecture, which separates the frontend from the backend, allows a better decoupling of both interfaces so that teams can develop in their respective domains completely independently.

It also enables multiple client apps to interact with the same API, while ensuring data integrity and business rules, and a variety of user interfaces.

On the other hand, two different projects generate even more work: two separate deployments, two environments to configure, etc. One way to simplify this is to use Django’s own capabilities to serve static files. After all, the frontend is nothing more than a set of files of this type.

In this article, we’ll outline how to create a simple CRUD API with Django and its famous Django REST framework free from common Cross-Origin Resource Sharing (CORS) issues. We’ll also learn how to integrate Django with a React app.

We’ll cover everything, from setup and configuration to customizing our frontend components and backend API:

• How do we send data from Django to React?
• Setting up Python and Django
  • Setting up Python
  • Setting up Django
• Adding models and views to Django
• Migrating our Django models to the database
• Diving into our Django REST API
• Testing our endpoints in Django
• Building the React app
  • CRUD React components
  • Setting up our React app to integrate with Django
  • Working on the header component
  • Working on the Creating New Student form
  • Working on the modal to edit student information
  • Creating the students listing
  • Working on the home component

How do we send data from Django to React?

You can expose your API in different ways with Django. You can use a REST API, a GraphQL API, or RPC API, each with their own pros and cons. While GraphQL is a safe bet, we’re going to use traditional REST endpoints.

By the end of this tutorial, this will be our final output:

Setting up Python and Django

For this article, we’re not going to cover how to install basic tools, so make sure you review this list of what you need to have set up in your machine before you can follow this article:

• Python 3
• Pip (the default Python package installer)
• NodeJS (in a version 6 or plus) and npm (5.2+)

If you’re using Linux, chances are that Python is already installed. Run the python3 -V command to check.

In certain environments, you may have have Python 2 and Python 3 installed. In this case, you should use python3 instead of python when running commands. You can avoid this by installing PyEnv to be able to switch which version of Python the python command uses.

In the article, we’ll also make use of a handy Python feature called venv, also known as Python Virtual Environment. This feature basically allows developers to create a folder that’ll act exactly like a specific Python environment.

Setting up Python

Open your preferred IDE to an empty directory and follow along as we begin. Remember to always give your directory a good name.

Let’s run the command inside this folder to create our venv:

python -m venv logrocket_env

After you enter the created folder, you’ll see some other files, such as bin, lib, and share. These files guarantee you are in an isolated context of Python configuration. To make use of the bin file, you have to make sure it’s activated:

source ./logrocket_env/bin/activate

Then your command line will look like the example below, with the name in parentheses confirming that you’re in the venv:

(logrocket_env) username@localhost: _

Note that once you are inside the venv, you can use the commands pip or python normally. If you are outside the venv, you must use pip3 and python3.

That’s it. You’re good to go with your venv.

Setting up Django

Next, let’s start installing Django by running the following command inside of your venv:

pip install django djangorestframework django-cors-headers

Note that we’re installing two more dependencies for our API:

• Django REST Framework: a powerful and flexible toolkit for building Web APIs
• django-cors-headers: an app for handling the server headers required for CORS

These dependencies are useful for when we try to access the API from a different application. In this case, they help to connect Django and React.

We’ll also make use of two other Django features designed to help us with boilerplate configs: django-admin and manage.py.

django-admin is Django’s automatic admin interface. It’s basically a command-line utility to perform handy operations with Django.

manage.py is a script that will help us manage our database, create tables from our models, handle migration and versioning, and properly create our projects.

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Now, we’ll run the following command to create our API project — remember that you must be inside the venv:

django-admin startproject django_react_proj

After the project is created, check the root folder for the manage.py file we mentioned earlier. We’ll explore the rest of the files further.

Let’s start our Django configuration using the settings.py file inside the django_react_proj/ folder. When you open this file, you’ll see a lot of configs. INSTALLED_APPS is the one that matters to us.

Add the following three lines to the array:

INSTALLED_APPS = [ ... 'rest_framework', 'corsheaders', 'students' ]

These three lines are the dependencies we’ve previously installed, along with the name of our to-be-created API folder.

Now, add the following into the MIDDLEWARE array:

MIDDLEWARE = [ .... 'corsheaders.middleware.CorsMiddleware', 'django.middleware.common.CommonMiddleware', ]

These correspond to a filter that will intercept all of our application’s requests and apply CORS logic to them.

However, since we’re working full localhost, we’ll disable the CORS feature by adding the following to the same file:

CORS_ORIGIN_ALLOW_ALL = True

Great! Now, let’s move on to the models and views of our application.

Adding models and views to Django

In order to create some preset files, we’ll make use of the manage.py script once again. This time, run the following:

django-admin startapp students

After that, a students/ folder will be created, along with models.py and views.py. Initially, these files will have little to no content inside.

Let’s start by removing everything currently in the models.py file and adding our models instead:

from django.db import models class Student(models.Model): name = models.CharField("Name", max_length=240) email = models.EmailField() document = models.CharField("Document", max_length=20) phone = models.CharField(max_length=20) registrationDate = models.DateField("Registration Date", auto_now_add=True) def __str__(self): return self.name

Notice that our Student class extends from Django’s Model class. This will make our lives easier once it connects directly to the Django models framework, which we’ll use to create our database tables.

It’s also important to set all the fields with the proper types and configurations, including max length if it’s required, description, autocreation, etc.

Migrating our Django models to the database

Now, let’s export our models to the database through Django’s migrations feature.

Migrations are Django’s way of propagating changes you make to your models — such as adding a field or deleting a model — into your database schema.

They’re designed to be mostly automatic, but you’ll need to know when to make migrations, when to run them, and what common problems you may run into.

Go to the root of the application and run the following:

python manage.py makemigrations

You’ll see the name and location of the file created for versioning these changes. Then, we need to apply the changes to the database itself:

python manage.py migrate

The next step consists of creating what we call a data migration file. It represents the direct manipulation of data into the database. To create this file, run the following command:

python manage.py makemigrations --empty --name students students

Note that the versioning is made upon numbers by the end of the file to maintain the order.

After that, go to the django_react_proj/students/migrations/ folder and change the content to the following:

from django.db import migrations def create_data(apps, schema_editor): Student = apps.get_model('students', 'Student') Student(name="Joe Silver", email="[email protected]", document="22342342", phone="00000000").save() class Migration(migrations.Migration): dependencies = [ ('students', '0001_initial'), ] operations = [ migrations.RunPython(create_data), ]

In short, the create_data method recovers the Student model object and creates initial data, just so that our database isn’t empty when the API starts.

The dependencies property relates the other files to be considered into the migration process.

The operations are basically the actions Django has to perform once the migration is triggered.

Now we’re ready to run the migrate command again. In the django_react_proj/ folder, run:

python manage.py migrate

Diving into our Django REST API

Now it’s time to dive into the REST API that we’re going to build on top of Django REST framework. Here, you’ll get in touch with two main worlds: views and URLs. A view is the initial entrypoint of a request made upon a specific endpoint served by a URL.

This is all mapped by the Django REST framework once we connect the function itself to the endpoint. We’ll also make use of serializers.

They allow complex data, such as QuerySets and model instances, to be converted to native Python datatypes that can then be easily rendered into JSON. Let’s start there.

Create a new file serializers.py into the students/ folder and add the following content:

from rest_framework import serializers from .models import Student class StudentSerializer(serializers.ModelSerializer): class Meta: model = Student fields = ('pk', 'name', 'email', 'document', 'phone', 'registrationDate')

The Meta class is important here because it defines the metadata information that our model has (database) and that must be converted to the Student class.

Next, let’s open the urls.py file located in the django_react_proj/ folder and change its content to the following:

from django.contrib import admin from django.urls import path, re_path from students import views urlpatterns = [ path('admin/', admin.site.urls), re_path(r'^api/students/$', views.students_list), re_path(r'^api/students/([0-9])$', views.students_detail), ]

The admin path was already there. The only things we added are the students endpoints. Note that each of them is connected to a to-be-created view function, so this is the place where we route our requests.

The first endpoint will handle both creations (POST) and listing (GET). The second one will remove (DELETE) or update (PUT) the data of a single student. Simple, right?

Now, let’s go to the views. Open up the students/views.py file and copy in the following code:

from rest_framework.response import Response from rest_framework.decorators import api_view from rest_framework import status from .models import Student from .serializers import * @api_view(['GET', 'POST']) def students_list(request): if request.method == 'GET': data = Student.objects.all() serializer = StudentSerializer(data, context={'request': request}, many=True) return Response(serializer.data) elif request.method == 'POST': serializer = StudentSerializer(data=request.data) if serializer.is_valid(): serializer.save() return Response(status=status.HTTP_201_CREATED) return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST) @api_view(['PUT', 'DELETE']) def students_detail(request, pk): try: student = Student.objects.get(pk=pk) except Student.DoesNotExist: return Response(status=status.HTTP_404_NOT_FOUND) if request.method == 'PUT': serializer = StudentSerializer(student, data=request.data,context={'request': request}) if serializer.is_valid(): serializer.save() return Response(status=status.HTTP_204_NO_CONTENT) return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST) elif request.method == 'DELETE': student.delete() return Response(status=status.HTTP_204_NO_CONTENT)

The first method, students_list, is handling both GET and POST operations over the root endpoint of our API.

This means every time we make a request over http://localhost:8000/api/students with GET and POST HTTP verbs, we’ll execute this method.

The first thing is to get all the students from our model through the Student object. It provides an implicit object called object with a method to access the entire database: all().

Then, we pass the result to our serializer, which will take care of the converting process before we return it as a response.

For the POST method, note that we’re first calling the is_valid() method on the serializer to ensure that the data received is conformed with our model. Otherwise, the serializer would throw an exception here. If all is fine, we save it to the datastore.

The next PUT and DELETE operations are pretty much the same, changing only the HTTP verbs and the responses.

That’s it!

Testing our endpoints in Django

Now, let’s run our Django application in order to test these endpoints. Run the following command into the root folder:

python manage.py runserver

After you see the log showing our server is up and running, go to the browser and access http://localhost:8000/api/students/. You’ll see something like this:

What you see here is Django’s Browsable API, a human-friendly HTML output that allows for easy browsing of resources, as well as forms for submitting data to the resources. It’s very handy for testing your endpoints easily without having to make use of cURL or other UI tools.

You can also use the other HTTP methods through the form in the bottom of the image. Go ahead and play around with it.

Building the React app

Now it’s frontend time.

It’s important to note that we’re not going to dive into React details here, so take some time to read up on React if you’re a beginner. The focus of this tutorial is to show you how to consume a Django API quickly from a React app.

In this article, we’ll use the latest version of React. However, feel free to use whichever version you prefer. We also won’t discuss the use of React Hooks or other side features of React, since the purpose is the API consumption itself.

Once you have Node and npm installed, let’s run the following command in the root folder of our Django project to create our React app:

npx create-react-app students-fe

If you don’t know create-react-app, read through a quick setup guide for some help getting started.

CRUD React components

We’ll divide our front end in some smaller components, as seen in the following figure:

The header component will store the header information, logo, etc.

The home component will be our main container, storing the rest of the other components, such as the listing of the students in a table.

We’ll also have two more components for the forms. The “update” and “add” forms will have pretty much the same components and will be placed in modals. Having both functions depends on which modal is active now.

Setting up our React app to integrate with Django

Let’s go right to it. We’ll use Bootstrap with React for styling with the powerful reactstrap package. We’ll also use the promise-based HTTP client Axios to make HTTP request calls to our Django API.

First, we’ll add some important dependencies to our students-fe project, so cd into the project and run the following command:

npm install bootstrap reactstrap axios --save

Next, go to the src/index.js file and add the following import statement:

import "bootstrap/dist/css/bootstrap.min.css";

In your src/ folder, create another folder called constants, and then a file index.js. This file will store the utility constants of our React project. Add a single constant to hold the URL of our API:

export const API_URL = "http://localhost:8000/api/students/";

Then, let’s begin creating our components, starting with the header.

Working on the header component

Create another folder called components and, within it, a JavaScript file called Header.js. Add the following content:

import React, { Component } from "react"; class Header extends Component { render() { return ( <div className="text-center"> <img src="https://logrocket-assets.io/img/logo.png" width="300" className="img-thumbnail" style={{ marginTop: "20px" }} /> <hr /> <h5> <i>presents</i> </h5> <h1>App with React + Django</h1> </div> ); } } export default Header;

This is pretty much static HTML represented under JSX. Nothing much of note here.

Working on the Creating New Student form

Now, let’s change our strategy and build the next components from the innermost to the outermost ones. In the same components folder, create a new file called NewStudentForm.js and add the following:

import React from "react"; import { Button, Form, FormGroup, Input, Label } from "reactstrap"; import axios from "axios"; import { API_URL } from "../constants"; class NewStudentForm extends React.Component { state = { pk: 0, name: "", email: "", document: "", phone: "" }; componentDidMount() { if (this.props.student) { const { pk, name, document, email, phone } = this.props.student; this.setState({ pk, name, document, email, phone }); } } onChange = e => { this.setState({ [e.target.name]: e.target.value }); }; createStudent = e => { e.preventDefault(); axios.post(API_URL, this.state).then(() => { this.props.resetState(); this.props.toggle(); }); }; editStudent = e => { e.preventDefault(); axios.put(API_URL + this.state.pk, this.state).then(() => { this.props.resetState(); this.props.toggle(); }); }; defaultIfEmpty = value => { return value === "" ? "" : value; }; render() { return ( <Form onSubmit={this.props.student ? this.editStudent : this.createStudent}> <FormGroup> <Label for="name">Name:</Label> <Input type="text" name="name" onChange={this.onChange} value={this.defaultIfEmpty(this.state.name)} /> </FormGroup> <FormGroup> <Label for="email">Email:</Label> <Input type="email" name="email" onChange={this.onChange} value={this.defaultIfEmpty(this.state.email)} /> </FormGroup> <FormGroup> <Label for="document">Document:</Label> <Input type="text" name="document" onChange={this.onChange} value={this.defaultIfEmpty(this.state.document)} /> </FormGroup> <FormGroup> <Label for="phone">Phone:</Label> <Input type="text" name="phone" onChange={this.onChange} value={this.defaultIfEmpty(this.state.phone)} /> </FormGroup> <Button>Send</Button> </Form> ); } } export default NewStudentForm;

Here, we have some important things going on.

In the first lines, we’re importing some reactstrap components for the first time, including Form, Button, and other components that will comprise our form.

Then, we created our state object with the corresponding properties of our NewStudentForm model. This is going to be useful for manipulating each prop individually.

The componentDidMount function will run after the component finishes its startup, so we can recover the student’s props from the parent component (this.props) here, and set the state with them (if they exist, for the editing scenario.)

The onChange function will handle the update of each state’s prop with the current value typed in each respective field.

The createStudent function will deal with the HTTP POST requests of our form. Every time we press the “submit” button, this function will be called, triggering the Axios post() function and passing the current state in the request’s body.

Once it’s completed, we’ll call two props functions: resetState to refresh the table, and toggle to close the modal. We’ll go over how to create these later on.

Working on the modal to edit student information

The editStudent function works almost like the previous one, but by calling our PUT operation instead.

The defaultIfEmpty function was created as an auxiliary function that’ll check the current value of each field in order to determine if they’re going to be filled with the value of the state — in case any exists, for editing — or not, when creating a new student.

The render function will just compose our form with the help of reactstrap components. Note the onSubmit property, which checks for a props property called student. If the property exists, the submit function will be for editing (the value was passed by the parent component); otherwise, it’s for creation.

Next, we’ll turn our attention to the modal component that’ll contain the form we’ve just created. For this, create a new component file called NewStudentModal.js and add the code below:

import React, { Component, Fragment } from "react"; import { Button, Modal, ModalHeader, ModalBody } from "reactstrap"; import NewStudentForm from "./NewStudentForm"; class NewStudentModal extends Component { state = { modal: false }; toggle = () => { this.setState(previous => ({ modal: !previous.modal })); }; render() { const create = this.props.create; var title = "Editing Student"; var button = <Button onClick={this.toggle}>Edit</Button>; if (create) { title = "Creating New Student"; button = ( <Button color="primary" className="float-right" onClick={this.toggle} style={{ minWidth: "200px" }} > Create New </Button> ); } return ( <Fragment> {button} <Modal isOpen={this.state.modal} toggle={this.toggle}> <ModalHeader toggle={this.toggle}>{title}</ModalHeader> <ModalBody> <NewStudentForm resetState={this.props.resetState} toggle={this.toggle} student={this.props.student} /> </ModalBody> </Modal> </Fragment> ); } } export default NewStudentModal;

This time, the only state prop we’re creating is the modal’s state in order to check whether it must be open or closed.

The toggle function (the one our form receives as a parameter) will switch the current modal’s value to the opposite every time it’s called.

In the render function, we’re first checking if a create boolean was passed as a parameter from the parent caller to decide if the button is for editing or creating. The buttons are created dynamically depending on what the parent said to us.

Then, the Modal component can be mounted upon these conditions further down. Pay attention to where we’re placing the <NewStudentForm /> component we’ve just created.

Creating the students listing

The NewStudentModal component will be placed into the StudentList.js we’re going to create now:

import React, { Component } from "react"; import { Table } from "reactstrap"; import NewStudentModal from "./NewStudentModal"; import ConfirmRemovalModal from "./ConfirmRemovalModal"; class StudentList extends Component { render() { const students = this.props.students; return ( <Table dark> <thead> <tr> <th>Name</th> <th>Email</th> <th>Document</th> <th>Phone</th> <th>Registration</th> <th></th> </tr> </thead> <tbody> {!students || students.length <= 0 ? ( <tr> <td colSpan="6" align="center"> <b>Ops, no one here yet</b> </td> </tr> ) : ( students.map(student => ( <tr key={student.pk}> <td>{student.name}</td> <td>{student.email}</td> <td>{student.document}</td> <td>{student.phone}</td> <td>{student.registrationDate}</td> <td align="center"> <NewStudentModal create={false} student={student} resetState={this.props.resetState} /> &nbsp;&nbsp; <ConfirmRemovalModal pk={student.pk} resetState={this.props.resetState} /> </td> </tr> )) )} </tbody> </Table> ); } } export default StudentList;

Here, the focus is explicitly the students listing and nothing else. Be careful not to mix different logic and rules that don’t belong here.

The heart of this component is the iteration over the students prop we’ll receive from the parent component (Home). The map function will take care of the iteration by providing a variable (student) for us to access each value.

Again, take a look at the NewStudentModal and ConfirmRemovalModalcomponents, which are just placed under the last <td>.

The following is the content of the ConfirmRemovalModal component:

import React, { Component, Fragment } from "react"; import { Modal, ModalHeader, Button, ModalFooter } from "reactstrap"; import axios from "axios"; import { API_URL } from "../constants"; class ConfirmRemovalModal extends Component { state = { modal: false }; toggle = () => { this.setState(previous => ({ modal: !previous.modal })); }; deleteStudent = pk => { axios.delete(API_URL + pk).then(() => { this.props.resetState(); this.toggle(); }); }; render() { return ( <Fragment> <Button color="danger" onClick={() => this.toggle()}> Remove </Button> <Modal isOpen={this.state.modal} toggle={this.toggle}> <ModalHeader toggle={this.toggle}> Do you really wanna delete the student? </ModalHeader> <ModalFooter> <Button type="button" onClick={() => this.toggle()}> Cancel </Button> <Button type="button" color="primary" onClick={() => this.deleteStudent(this.props.pk)} > Yes </Button> </ModalFooter> </Modal> </Fragment> ); } } export default ConfirmRemovalModal;

This component is also very simple; it hosts the removal operation. We’ll call this one our DELETE endpoint.

Since it’s also a modal, we must have the state’s modal prop too, as well as the toggle function. The deleteStudent function will handle the HTTP call to delete the given student.

The rest of the code is very similar to what we’ve seen already.

Working on the home component

Let’s build our Home.js component now. Create the file and add the following to it:

import React, { Component } from "react"; import { Col, Container, Row } from "reactstrap"; import StudentList from "./StudentList"; import NewStudentModal from "./NewStudentModal"; import axios from "axios"; import { API_URL } from "../constants"; class Home extends Component { state = { students: [] }; componentDidMount() { this.resetState(); } getStudents = () => { axios.get(API_URL).then(res => this.setState({ students: res.data })); }; resetState = () => { this.getStudents(); }; render() { return ( <Container style={{ marginTop: "20px" }}> <Row> <Col> <StudentList students={this.state.students} resetState={this.resetState} /> </Col> </Row> <Row> <Col> <NewStudentModal create={true} resetState={this.resetState} /> </Col> </Row> </Container> ); } } export default Home;

Here, our state will host the array of students we’ll recover from the server.

The resetState function (which we called earlier) will just call getStudents, which in turn calls the GET endpoint in our API with the full list of students.

The rest of the listing refers to the use of StudentList and NewStudentModal components. Feel free to organize the exhibition of your components on your own.

Next comes the last step before we can test our app. Import the Header and Home components to our App.js file:

import React, { Component, Fragment } from "react"; import Header from "./components/Header"; import Home from "./components/Home"; class App extends Component { render() { return ( <Fragment> <Header /> <Home /> </Fragment> ); } } export default App;

Now, run the command npm start and your React app will open the browser to the http://localhost:3000/ URL. Make sure to have your Django API up and running as well.

Conclusion

You can access the full source code of this project here.

Of course, this is only one way of doing this. The good thing about using React is that you can organize your components (or even create more components out of the ones you have) in many different ways to achieve the same goal.

In the world of SPAs, your backend APIs are practically fully independent from the frontend clients. This gives you the flexibility to change the whole architecture of your API (like switching from Django to Flask, for example) without any side effects to your React apps.

As a challenge, try to add a pagination system to your API/React app. The Django REST Framework provides support for customizable pagination styles.

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1. Visit https://logrocket.com/signup/ to get an app ID

2. Install LogRocket via npm or script tag. LogRocket.init() must be called client-side, not server-side

   • npm
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   $ npm i --save logrocket // Code: import LogRocket from 'logrocket'; LogRocket.init('app/id'); // Add to your HTML: <script src="https://cdn.lr-ingest.com/LogRocket.min.js"></script> <script>window.LogRocket && window.LogRocket.init('app/id');</script>
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