How to Fix jQuery DataTable Not Redrawing on Second Load

Discover a quick and effective solution for the jQuery DataTable issue where data doesn't redraw on the second execution. Learn how to properly reset and reload your DataTable for seamless updates.
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This video is based on the question https://stackoverflow.com/q/67809999/ asked by the user 'sGermosen' ( https://stackoverflow.com/u/5155563/ ) and on the answer https://stackoverflow.com/a/67822475/ provided by the user 'sGermosen' ( https://stackoverflow.com/u/5155563/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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How to Fix jQuery DataTable Not Redrawing on Second Load: A Simple Solution

Managing data tables on web applications can be tricky, especially when working with legacy code. If you've encountered the frustrating problem where your jQuery DataTable fails to redraw and load new data after the first execution, you are not alone. Let's delve into the issue and explore a practical solution to get your table refreshing smoothly.

Understanding the Problem

When implemented correctly, jQuery DataTable should allow you to dynamically load data from a server and refresh that data with a simple click of a button. In many cases, the first load works perfectly, but subsequent attempts to refresh the data return no results. This could be due to improperly destroying the old DataTable instance or a failure to correctly reinitialize it.

In this specific case, the user reported that the clear function was not recognized, and they could not reload their data on clicking the refresh button. The outdated code can also lead to unexpected behaviors.

Key Symptoms of the Issue:

The DataTable successfully loads data on the first request.

Reloading the DataTable by clicking the button doesn't result in new data being displayed.

Errors or unrecognized functions when attempting to clear data.

The Solution

The solution involves ensuring that the DataTable instance is correctly destroyed before a new one is created. This prevents conflicts with the old DataTable and prepares the new one to accept fresh data from the server. Here’s how to do it step by step:

Step-by-Step Fix

Destroy the Old DataTable Instance: Before reloading the DataTable, force it to destroy the existing instance. This destroy method clears any current data and prepares the table for a reset.

Submit Filter to Fetch New Data: Use the submitFilter() method to ensure that it sends the necessary parameters to fetch the latest data from the server.

Reinitialize the DataTable: After destroying the previous instance, call the function to initialize the DataTable once more.

Updated Code Implementation

Here’s how you can implement the solution in your script:

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

Explanation of the Code

$(# datatable_report_sales).DataTable().destroy();: This line clears the DataTable and all its settings.

grid.submitFilter();: Ensures that new data is requested from the server based on current filters or selections.

grid = new Datatable();: Creates a fresh instance of the DataTable object.

InitGrid();: Calls the function that sets up the DataTable with new configurations.

Conclusion

Refreshing data in a jQuery DataTable can sometimes be problematic, especially for those managing legacy projects. By following the steps outlined here, you can effectively reset your DataTable to ensure that it redraws the data as expected with each refresh. Don't forget to adapt your code to address any additional specifications specific to your project, and you'll be on your way to a more dynamic user experience.

Feel free to test this solution in your application and share your thoughts or additional challenges you might encounter! Happy coding!

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