Custom Validation Rules

About

Some Backpack fields are more difficult to validate using standard Laravel validation rules. So we've created a few custom validation rules, that will make validation them dead-simple.

ValidUpload for upload field type

The ValidUpload rule is used to validate the upload field type. Using the custom rule helps developer avoid to setting different validation rules for different operations, (create/update).

// for the field
CRUD::field('avatar')->type('upload');

// you can write the validation rule as

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

'avatar' => ValidUpload::field('required')->file('mimes:jpg,png|max:2048'),

The ::field() constructor accepts the rules for the field, while ->file() accepts the specific rules for files sent in field. The validation rule handles the sometimes case for you.

ValidUploadMultiple for upload_multiple field type

You can use this validation rule to handle validation for your upload_multiple field - both for the Create and the Update operation in one go:

• use the ::field() constructor to define the rules for the field;
• use the ->file() method for rules specific to the files sent in field;

// for the field
CRUD::field('attachments')->type('upload_multiple');

// you can write the validation rule as

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

'attachments' => ValidUploadMultiple::field(['min:2', 'max:5'])->file('mimes:pdf|max:10000'),    

ValidDropzone for dropzone field type

You can use this validation rule to handle validation for your dropzone field - both for the Create and the Update operation in one go:

• use the ::field() constructor to define the rules for the field;
• use the ->file() method for rules specific to the files sent in field;

// for the field
CRUD::field('photos')->type('dropzone');

// you can write the validation rule as

use Backpack\Pro\Uploads\Validation\ValidDropzone;

'attachments' => ValidDropzone::field('min:2|max:5')->file('file|mimes:jpg,png,gif|max:10000'),