Скачать или смотреть How to Fix Null Values in Laravel Validation: Adding Input Names Made Easy

Learn how to resolve the issue of Laravel validation returning `null` values by properly setting input names in your forms. This solution is beginner-friendly and easy to implement!
---
This video is based on the question https://stackoverflow.com/q/65126381/ asked by the user 'solitude' ( https://stackoverflow.com/u/12280406/ ) and on the answer https://stackoverflow.com/a/65126430/ provided by the user 'Mouad ZIANI' ( https://stackoverflow.com/u/9735205/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: Laravel validation returns to null using value="{{ old(firstname) }}" and still throw errorbag when i already typed data on textfield

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l...
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
Troubleshooting Laravel Validation Issues

If you're delving into Laravel and recently encountered an issue where validation returns null, you're not alone. Many newcomers face this problem, especially during the registration process when they get error messages even after entering data correctly. This guide dives into the common pitfalls regarding validation in Laravel and how you can easily fix them.

Understanding the Problem

When building forms in Laravel, data is sent from the front end (your HTML) to the back end (your Laravel controller). When using the old() function to repopulate form fields, it relies on the names of the input fields to retrieve the previous values. If these names are not set correctly, Laravel won't know what data to pull, leading to null values and displaying error messages, even if you've entered data.

Common Scenario

Consider this scenario in Register.blade.php:

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

At first glance, everything looks okay. However, if you forget to specify the name attribute for firstname and lastname, Laravel can't match the input values with the expected data. As a result, you might see error messages about required fields even when you have filled them in.

The Solution: Adding Input Names

To fix the validation issue, all you need to do is add the name attribute to your input fields. This tells Laravel which data to associate with each field. Here's a simple guide on how to implement this fix:

Step-by-Step Fix

Identify Your Input Fields: Look at your form inputs where you're retrieving the old values using the old() function.

Add the Name Attribute: Modify your input fields to include a name attribute that matches what you defined in your validation rules.

Example Modification

Change your input fields from this:

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

To this:

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

Reminder About Validation Rules

In your PageController.php, ensure that your validation rules match the names you used in your HTML form inputs. For example, if you validated 'firstname' and 'lastname', those input fields must have matching name attributes.

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

Conclusion

Fixing the null value issue during validation in Laravel is an easy task once you understand the importance of the name attribute in your form inputs. By ensuring each input field has a name attribute that corresponds to the validation rules, you'll help Laravel correctly handle the data, maintain user input after errors, and provide a better user experience.

Remember, the next time you encounter validation troubles, check those input names first. Happy coding!