I would like to know how to add a little math to the save method of
a Display Group.
...
The value they are modifying is called
"transactionptDisplayGroup.selectedObject.passThroughAmt". I would
like to know how to take the user's entered value and add 15 to it
prior to the save. Then I would like to take the value of
"transactionptDisplayGroup.selectedObject.passThroughAmt" before
their edit and subtract from it the value the user entered with the
added 15 and set the value of another field of the displayed group,
"transactionptDisplayGroup.selectedObject.salonPtRec". Finally, I
would like to save the results to the DB.
Take a look at the validateForSave/validateForUpdate methods in
EOValidation.