[rules-users] Rule in decision table

[Jeffrey Schneller]

I am trying to write a condition for a decision table and can't seem to
figure out how to do it.    

 

I have a global variable called area.  This is in sq. ft.

 

I have a fact called Item which has an attribute called weight.  This is
in grams / sq. ft.

The Item comes from the attribute called value from a fact named Choice
where the sku attribute matches what is in the rule

 

I want to compare the (weight * area) to the parameter for the row.  The
parameter is being passed in as lbs.

 

Here is what I tried for my three condition columns:

 

CONDITION
CONDITION
CONDITION

mm : Choice                                                           

sku
exists(Item(weight * area > ($param * 453.5924)) from mm.value)
exists(Item(weight * area <= ($param * 453.5924)) from mm.value)

 

 

This did not work.  This will work if I remove the formula and just do
something like exists(Item(weight > $param) from mm.value).   So the
syntax is correct except for the comparison that I want to do.

 

Any ideas on how to do this?

 

Thanks.

 

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