How do I validate an image field?

[backpack-operations]

So i'm using the image field... and people can upload an image there. But now I'm wondering... how do I validate this thing? Do I use the normal Laravel rules or does Backpack have a validation rule for it that makes it easy for me?

[jcastroa87]

Hello @backpack-operations

To validate the image field in Backpack, you have a couple of options:

1. For the upload field type, Backpack provides a custom validation rule called ValidUpload. This makes validation easier, especially when dealing with create and update operations. You can use it like this:

use Backpack\CRUD\app\Library\Validation\Rules\ValidUpload;

'image' => ValidUpload::field('required')
                ->file('file|mimes:jpeg,png,jpg,gif,svg|max:2048'),

This rule allows you to define field rules and file rules separately, making it more convenient Docs > 6.x > Fields > FREE Field Types > upload.

2. However, for the image field type specifically, which sends a base64 string, you'll need to use a special package to validate it. Backpack doesn't currently have a built-in validation rule for the image field type. A recommended package for this is crazybooot/base64-validation. You can install it with:

composer require crazybooot/base64-validation

This package provides validation rules specifically for base64 encoded images Github Issue: [Bug] The File/Image validation rule does not work on the Image field.

It's worth noting that the Backpack team is working on improving the uploaders system, including validation, and they're considering creating a ValidationRule for the image field type in the future Github Issue: Image Validation.

Remember, always ensure you're using the appropriate validation method for the specific field type you're working with in Backpack.

Cheers.