When exactly an object deletion rules are triggered?

greg · Post by **greg** » Fri Apr 21, 2006 7:31 am

Are object deletion rules triggered just before or just after removal of an object instance? For example, BOA is related to BOB and a calculated attribute in BOB counts how many BOA instances are linked to a BOB. I need to re-set this attribute when BOA is deleted. I added these two rules to the object deletion node of BOA:

rule 1: FIND BOB WHERE BOA IN BOB.RelatedAttribute
rule 2: UPDATE BOB

Will it work? I guess could find out the answer empirically but I want to learn more about the way deletion rules operate.

aware_support · Post by **aware_support** » Fri Apr 21, 2006 11:19 am

Deletion rules are triggered before the object is deleted so your rules will not work. I would put the following rule on BOB to perform the calculation that you want:

If BOB.RelatedAttr WAS CHANGED Then
BOB.COUNT_ATTRIBUTE = COUNT BOA WHERE BOA IN BOB.RelatedAttr