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Learn how to return the current page limit in responses using Django Rest Framework's custom pagination. Enhance your API with clear pagination details!
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How to Return the Current Page Limit in Django Rest Framework Responses

When building APIs with Django Rest Framework (DRF), pagination plays a vital role in managing large datasets. It allows you to send a limited number of records per response, which makes the API more efficient and user-friendly. A common requirement is to return not only the data but also pagination details like the current page limit, which helps in providing context to the API consumers.

In this post, we’ll explore how to return the current page limit in the response using a custom pagination class in DRF.

Understanding the Problem

When you create a custom pagination class in Django Rest Framework, you might want to include additional metadata in your responses, such as:

The number of items returned on the current page.

The total number of pages.

The maximum limit of items per page.

The total number of items available.

In our scenario, we focus on how to return the current_items_per_page in your API response.

Solution: Custom Pagination Class

Step 1: Create a Custom Pagination Class

You will start by creating a custom pagination class that extends DRF's built-in PageNumberPagination. Here's how you can implement it:

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

Step 2: Explanation of the Code

Pagination Settings:

The page_size sets the default number of items that will be displayed on each page.

The max_page_size sets the maximum items that can be requested per page.

Pagination Logic:

The generate_response method handles pagination. It attempts to fetch the requested page from the provided queryset.

If an error occurs, it sends back a standard ‘NotFoundError’ message.

Returning Current Page Limit:

The key to returning the current items per page is len(self.page.object_list). This expression counts the number of items that are currently being displayed on that specific page.

Step 3: Integrate the Custom Pagination

To apply this custom pagination in your views, simply set the pagination class in your API view:

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

Conclusion

Implementing custom pagination in Django Rest Framework not only improves the performance of your API but also provides essential context in API responses. By including the current_items_per_page in your response, you enhance the usability of your API.

Feel free to customize this implementation further as per your needs or project specifications. Happy coding!