What is the reason behind that we should not write before Business Rules on Catalog related tables?

[Daniel Borkowi1]

Hi Community, 

the ServiceNow documentation  states, that you should not create Before Business Rules on catalog related tables:

• Request [sc_request]
• Request Item [sc_req_item]
• Cart [sc_cart]
• Cart Item [sc_cart_item]

See: https://docs.servicenow.com/bundle/utah-it-service-management/page/product/planning-and-policy/conce...

Also Instance Trouble shooter will create findings for such Business Rules.

My Question is - what is the reason behind that restriction?

Greets

Daniel

[Karan Chhabra6 · Accepted solution]

Hi @Daniel Borkowi1 ,

One reason for this restriction can be that the request item records are inserted in the database before the request record does and therefore the business rules on sc_req_item runs before any business rules defined on sc_request table.

[Daniel Borkowi1]

Hi @Karan Chhabra6, thanks for your input.

But if the Business rule is only impacting the request item, this should be no issue, or? Most of the logic is like - if something is set in RITM get some additional information and update a field on RITM - so Request self is not involved. For sure your statement makes sense, if in RITM BR is something requested from Request - but this doesn't justify that you should not use before BR on RITM at all.

Greets 

Daniel