Add field index in error message when validating multiple fields

[uwla]

Hello!

I would like to ask a feature that add field index in error message when validating multiple fields. Let me explain it better.

First, I kindly ask you to visit this question on StackOverflow. If you have visited it, there is no much need to read the paragraphs below since they are near the same thing.

Suppose we have a page where the user submit a form with dynamic fields. For example, a gallery where the user can upload images for blog posts. Suppose that the requirements are a valid image, a valid caption, and html alt attribute as a placeholder for the image.

When using Laravel's validator, if the validation fails to more than one of these dynamic fields, then the same error message will repeat. For example, if the fields 4, 8, and 10 are all wrong, then it will appear three error messages that are the same.

The field 'image file' is required.
The field 'image caption' is required.
The field 'image alt' is required.
The field 'image caption' is required.
The field 'image alt' is required.
The field 'image file' is required.

The problem is that the user needs to know which fields are wrong. If the error messages contains the index of the wrong fields, it will be very convenient for the user to locate the error.

The field 'image file (item 4)' is required.
The field 'image caption (item 4)' is required.
The field 'image alt (item 4)' is required.
The field 'image caption (item 10)' is required.
The field 'image alt (item 10)' is required.
The field 'image file (item 10)' is required.

One workaround to this problem is to validate each dynamic field through a loop, so that in each iteration we add the field index to the error message, if any error message for the given field.

However, It would be much better if Laravel comes with built-in features to validate dynamic fields. When it comes to user-friendly platforms, with a lot of interactions, it's really convenient to have dynamic fields and validations that help the user.

If you think I wasn't clear enough, please point that out so that I can write a better feature request.

Thanks in advance :)

[garbinmarcelo]

This would be very useful, we hope it will be developed....

[rodrigoUriarte]

Working with arrays needs to have the index value to throw custom messages. This will be a great feature

[Bird87ZA]

I've created a PR for this change:

#41123