Add the fixed amount discount for the coupon type.

[aglipanci]

There are a lot of user that may need this, besides the fact that the admin can create % discount, he can also create fixed amount discount, for example $10 discount coupon.

[stevie-mayhew]

Hey @aglipanci,

Thanks for this - can you confirm that this works with the multi-currency module? I think that you will need to add an extension point for the Amount() function in the case of a fixed discount.

[aglipanci]

@stevie-mayhew to be honest i am quite new on SilverStripe, i did this for one of my clients (he doesn't use the multi-currency module actually), however since i remove the fixed amount from the order Amount it should work with any currency (never tried myself).
What do you mean by "extension point for the Amount() function" ?

[stevie-mayhew]

@aglipanci yes you are correct the amount deducted will be correct in the multi-currency module, however we will need to display the calculated amount per currency to the user on the front end. @frankmullenger any reason why a change like this couldn't go in if it works with multi-currency?

I'll check this out later this week and see if we need to add anything for multi-currency support. I'll let you know how I get on.