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Learn how to instantly reflect database changes in your Flutter application's UI with simple callbacks for real-time updates.
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This video is based on the question https://stackoverflow.com/q/75715553/ asked by the user 'Chirag Maurya' ( https://stackoverflow.com/u/16559911/ ) and on the answer https://stackoverflow.com/a/75717630/ provided by the user 'Gabriel Coelho' ( https://stackoverflow.com/u/20381271/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Updating Your Flutter UI Instantly with Database Changes

If you're developing a Flutter application that interacts with a database, you may want your user interface (UI) to reflect the most recent data as soon as it is updated. This is particularly true for applications where users are frequently adding, editing, or deleting data. Today, we'll delve into a practical solution for ensuring that your Flutter UI updates immediately after changes are made to your database.

The Problem

Imagine you're working on a sales records application where users can enter new sales data. You have a table that displays this data, and a pop-up form allows users to submit new entries. After submitting a new sale, users expect the table to display the newly added information without having to refresh or manually update the data. How do you achieve that seamless experience?

The Solution

The key to resolving this issue lies in using callbacks to notify your UI of changes. Here’s a step-by-step approach to implement this functionality effectively.

Step 1: Modify the Sales Entry Form

You will need to pass a callback function to the SalesEntryForm. This function should be called after a new sale is successfully added to the database. Here's how you can do it:

Define the Callback

In your SalesEntryForm class, add a new parameter to accept the callback:

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

Invoke the Callback

After a sale is added successfully, invoke the callback function with the new sale instance or the data received from the database:

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

Step 2: Update the Sales Records Widget

In your SalesRecords stateful widget, you need to pass a function to SalesEntryForm that updates the sales list whenever a new sale is added.

Define the Callback Function

Add a method in the SalesRecords class to handle updates:

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

Pass the Callback to the Form

When opening the form popup, pass the _updateSales function to the SalesEntryForm:

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

Conclusion

By incorporating a callback mechanism between your UI and forms, you can ensure that your sales records table reflects real-time data as soon as changes are made in the database. This method enhances user experience and streamlines the data management process in your Flutter application.

Implementing the above techniques means users won’t have to perform any extra actions to see the latest entries. This smooth integration can make your application feel much more responsive and user-friendly.

Feel free to experiment with these modifications in your codebase. Happy coding!