Скачать или смотреть How to Send Role Information to the Frontend in Django Rest Framework with Djoser

Learn how to extend Djoser authentication with role information for your Vue.js frontend application effectively.
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Implementing Role-Based Access Control in Your Vue.js App Using Djoser

When building a web application, implementing a proper authentication system is crucial for managing user permissions and roles effectively. This is particularly true for applications with different user levels, such as admins and staff members, who might need access to exclusive parts of the application. In this guide, we'll explore how to send role information from Django Rest Framework (DRF) using the Djoser library to your Vue.js frontend, ensuring users have the appropriate access based on their roles.

The Challenge at Hand

You are developing a web application with login functionality through Django's backend. Using the Djoser library, you've successfully implemented login features, but now you face a new challenge: how to restrict access to specific pages in the frontend based on user roles. For instance, if a user is an admin or staff member, they should have access to additional pages in the navigation bar of the frontend.

You considered two options for achieving this:

Option 1: Send both the authentication token and the user's role during the login process.

Option 2: After the user logs in and receives the token, make a subsequent request to retrieve the user's information, including their role.

While the first option seems optimal as it results in only one backend call, you were unsure how to extend Djoser to include role information in the login response. Let’s dive into how to implement the first option effectively.

Extending Djoser for Role Information

To send both the authentication token and the user's role during the login process, you need to extend Djoser's existing functionality. Here’s how to do it step by step.

Step 1: Create a Custom Serializer

To build a custom response that includes the token and the user’s role information, you need to create a serializer in your project directory. This serializer will extend Djoser's TokenSerializer to add the necessary field for the user role.

Create a new serializer file in your Django app.

Use the following code to define your custom serializer:

[[See Video to Reveal this Text or Code Snippet]]

Step 2: Understanding the Code

auth_token: This field represents the token that will be generated upon successful login.

is_staff: This field retrieves the is_staff property from the user model using the source argument, which allows you to access fields from associated models easily.

read_only=True: This ensures that the is_staff field is not modifiable via API requests.

Step 3: Implementing the Custom Token Serializer

Once you have defined the serializer, you need to ensure that it’s utilized when users log in to your application. Here’s how you can do that:

In your Django app's settings, configure Djoser to use your newly created serializer for token authentication.

[[See Video to Reveal this Text or Code Snippet]]

Step 4: Test the Implementation

Now, when a user makes a request to the /auth/token/login/ endpoint with their login credentials, they should receive a response that includes both the authentication token and their staff status:

[[See Video to Reveal this Text or Code Snippet]]

Conclusion

By extending Djoser to include user role information in the authentication response, you can create a more streamlined and efficient authentication process. This technique minimizes the number of backend calls needed while providing the frontend Vue.js application with crucial role-based access information.

If you face any challenges or have questions on optimizing this setup further, feel free to reach out or leave a comment below! Happy coding!