How to use addfield pattern validation

Question

I have a custom admin form and unfortunately it doesnt have a UI component xml file.

I was able to add the no-whitespace class validation.

I would add also a regexp pattern, but I don't know where I should specify the format.

I tried

'class' => 'no-whitespace pattern',
'pattern' => '^[0-9]+(,[0-9]+)*$'

but only no-whitespace works fine

any idea? tnx

Answer 1

Antonio Pedicini, instead of add custom pattern direct to input field ,my suggest to create a magento 2 create custom validation

So, extend rules.js to add custom validation rules for this pattern.

First create folder inside at app/design/adminhtml/Magento/backend/Magento_Ui/web/js/lib/validation/rules.js if its already exist then skip it keep file into below location from core module.

And that files add

 "MyCustompattern": [
 function(value) {
 return value.match(/^[0-9]+(,[0-9]+)*$/);
 },
 $.mage.__('My Custom Validaion')
 ],

after

"no-whitespace": [
 function(value) {
 return /^\S+$/i.test(value);
 },
 $.mage.__('No white space please')
 ],

Then add MyCustompattern in 'class' => 'no-whitespace MyCustompattern'

Final delete all file from var/view_preprocessed and var/cache,var/page_cache. Removepub/static `folder contents and run deploy command: for see ,it is working or not.

php bin/magento setup:static-content:deploy

Or,you can follow below blog for create custom rules

http://inchoo.net/magento-2/validate-custom-form-in-magento-2/

http://www.webmull.com/magento-2-add-new-custom-form-validation/

Adding custom global javascript validation

• apedic: tnx Amit, but in that case the rule will be site wide? I just need it on 1 admin form, why do you think is not a good idea to use pattern on the input? Also, do you have any example how to use it? i'm struggling to find any
• apedic: Amit, would that solution extend or override the core rule.js so I need to check against any update?