Unable to set negative custom option fixed price in admin view.

[WaterSlide]

In versions 2.1.1 and 2.1.2, setting custom options for a product with fix price settings will not allow a negative value. I'm not sure if this is a simple ui problem or if there is a validator issue. Either way, this was always an option in Magento 1.x in which you can set discounts on an item via custom option. Uploading values via CSV works correctly, however making admin view changes for given product will fail validation via negative values.

Preconditions

1. Magento 2.1.2
2. PHP 7

Steps to reproduce

1. Freshly install Magento.
2. Create product with a custom option.
3. Attempt to place a negative value in the custom option price input.

Expected result

1. Item validates and clients using the custom option allows a price reduction.

Actual result

1. Cannot save item. Validator fails.

[rganin]

Thank you for reporting. Internal issue created: MAGETWO-60573

[SahakTadevosyan]

Hi @WaterSlide did you fix this issue?
I have the same issue in Magento 2.1.3

[WaterSlide]

I am aware that editing the Magento core is a no-no, however I am pressed for time and needed a very quick fix. I'll be learning how to override things the proper way any day now....

A nice gentleman was kind enough to email me what he found:

vendor/magento/module-catalog/Ui/DataProvider/Product/Form/Modifier/CustomOptions.php

Set false for validate-zero-or-greater

vendor/magento/module-catalog/Model/Product/Option/Validator/DefaultValidator.php

protected function isNegative($value)
{
//return intval($value) > 0;
return false;
}

The code speaks for itself. The isNegative will always return false. I am not sure what other implications there are for doing it this way, however I have tested that a negative value will still offset the price as intended.

[EmilyPepperman]

I have this issue as well! Needs to be solved in core Magento... thank you WaterSlide for the solution for now. :-)

[iamjonjackson]

I need this also

[miro91]

@WaterSlide I tried your solution but it still give me "Invalid option value" error when I try to set negative price to some custom option.

[zaaaidi]

@WaterSlide Thanks alot. Its really works for me.

[robgt]

Any news on a fix for this issue?

[tejashp77]

Any news on a fix for this issue?