I am trying to change a validation rule from positive number to any number (so it allows negative numbers too) for the following field:

[Admin Area] -> Promotions -> Catalogue Price Rules -> Add New Rule -> Actions -> Discount Amount

I have successfully changed the client-side validation rule but am struggling with the server-side validation rule.

Here's where I have got to:



That function seems to fetch a rule_id from $_GET or $_POST and sends it to a load() method on the catalog/rule model, and then validateData() is called on that model with the data from $_POST.

I have searched all files for discount_amount but didn't seem to find any validation rules.


Found out how to do it.



Override that file to the local folder and comment out the first bit of code in that method.

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