Miva math error? Negative attribute with discount gives less discount.

[dreamingdigital]

We have a negative attribute on this item so the customer can save some money on not getting the part painted.

If that customer is in a price group to get discounts they actually get LESS of a discount instead of more of a discount for some reason so there appears to be a math issue here.

See picture. (if you don't see a picture below you're not logged into this forum)

The 150 is actually -150 but the strikethrough makes that not apparent. The other attributes in the picture are normal positive ones.

negative-attr.PNG

Thoughts?
Obviously if this is a known issue and we should not be doing it this way we can tell our client that and he can figure out a way to do it without having negative attribute values on products that get discounts. But in general there seems to be a bug/programming issue here.

[Bruce - PhosphorMedia]

Yea, it seems like, if an attribute has a negate value (say -100), and say a discount of 10% is applied to it, miva should be ADDING 10% to the '100' value.

[Eric Foresman]

We have a negative attribute on this item so the customer can save some money on not getting the part painted.

If that customer is in a price group to get discounts they actually get LESS of a discount instead of more of a discount for some reason so there appears to be a math issue here.

See picture. (if you don't see a picture below you're not logged into this forum)

The 150 is actually -150 but the strikethrough makes that not apparent. The other attributes in the picture are normal positive ones.

negative-attr.PNG

Thoughts?
Obviously if this is a known issue and we should not be doing it this way we can tell our client that and he can figure out a way to do it without having negative attribute values on products that get discounts. But in general there seems to be a bug/programming issue here.

Hi Colin,
I am able to reproduce what you are seeing, however im not sure that the behavior is incorrect. Because this is an attribute value and not part of the Discount subsystem it is getting treated just like any another attribute would. So all of the attribute prices and product price get added up, and then the discount is applied taking 10% off of the item total.

In this case the Price of your negative attribute is also reduced by 10%.

To get the “discounting attribute” to not be affected by the product percentage discount I think you would have to rework it so that all the other attributes added a positive price and the non-painted attribute just added $0.

Or you could try setting up a different discount module to apply to that product when the specified attribute is selected so that the $150 discount is added after 10% product discount gets calculated.

Hope this helps
-Eric

[lesliekirk]

Yeah, it's acting like its a double negative...

[dreamingdigital]

minus minus a minus is more minus. :)
anyways, yes, we can try and convince the client to not have negative attributes but they give the shopper such satisfaction - save $$!

[Eric Foresman]

minus minus a minus is more minus. :)
anyways, yes, we can try and convince the client to not have negative attributes but they give the shopper such satisfaction - save $$!

hmm, but its not (minus minus a minus), this is a percentage discount so its (minus X 0.9) which = less minus. right? or am i mathing wrong?

-Eric

[dreamingdigital]

It's whatever the source code for that section says. Feel free to post it. :)