Скачать или смотреть How to Fix Axios Pagination Issues in Your React Application

Discover how to resolve pagination problems with Axios in React by correctly implementing query parameters for fetching limited data.
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This video is based on the question https://stackoverflow.com/q/72324543/ asked by the user 'Zut4too' ( https://stackoverflow.com/u/17275094/ ) and on the answer https://stackoverflow.com/a/72327517/ provided by the user 'lpizzinidev' ( https://stackoverflow.com/u/13211263/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Solving Pagination Challenges with Axios in React

When working on a React application that requires fetching data, developers often encounter the need to implement pagination. A common question arises when paginating data fetched via Axios from a backend service: Why is my application loading all the data instead of limiting it to a specified number? Let's explore this problem and discover the solution step by step.

The Problem: All Data is Loaded

In your React application, you've set up the following code snippet to fetch payment data:

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

Despite your intention to retrieve only the first 15 records by using a page and limit parameter, the backend logic you have does not respect these limits. This leads to the loading of all data instead of a specific subset, causing performance issues in your application.

The Backend Code: Where It Goes Wrong

The backend implementation responsible for delivering payment data has the following structure:

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

In this code, the .find() method retrieves all entries in the database without considering the page and limit parameters sent from the frontend.

The Solution: Correct Usage of Query Parameters

To solve this issue, you need to modify the backend function to use the page and limit variables effectively. Here’s how you can do it:

Step 1: Retrieve Query Parameters

First, you need to extract the page and limit variables from the query parameters of the request.

Step 2: Implement Pagination Logic

Next, you will use these parameters to appropriately skip over the records you don't want and then limit the number you do want to retrieve. The updated code in your backend should look like this:

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

Explanation of Key Modifications

Skip Calculation: The expression (page - 1) * limit helps in calculating the number of entries to skip based on the current page. For instance, if page is 2 and limit is 15, it will skip the first 15 entries, effectively fetching the next set.

Limiting Results: Using .limit(Number(limit)) ensures that you only retrieve the specified number of records, which is crucial for efficient data handling and rendering in your frontend application.

Conclusion

By updating the backend function to properly handle pagination through query parameters, your React application will now fetch only the necessary data per page as intended, resolving the issue of retrieving excess data. This change enhances performance and provides a better user experience.

Final Thoughts

Implementing pagination is a vital skill for any developer working with data-heavy applications. With the correct use of Axios and adjustments in your backend, you can efficiently manage how data is fetched and presented in your application. Happy coding!