What will run first business rule or client script?

IamAmolB · ‎02-01-2016

Hi All,

From a long time i have a puzzel what will run first?
Client script, Business rule, UI policy or Data policy.

Miriam Berg · ‎02-01-2016

Hi Amol,

Client-based code:

"Client-based code that executes in the browser, using Ajax or running as Javascript, always executes before the form submission to the server."

This includes Client scripts and UI Policies.

First onLoad Client scripts, after that the first UI Policies kick in.

After that, the Client scripts and UI Policies that work onChange.

After that, the Client scripts that work onSubmit.

Server-side code: (More info: Execution Order of Scripts and Engines)

Before business rules:
Before engines.
Before business rules:
The data base operation (insert, update, delete).
After business rules:
After engines.
Email notifications.
After business rules.

Hope this helps!

BR /Miriam

View solution in original post

Mike Allen · ‎02-01-2016

It goes something like this:

Business Rule display/query

Client Script/UI Policy onLoad

Client Script onChange

Client Script onSubmit

Data Policy

if order < 1000

Business Rule before

Business Rule after

Global things like workflow, metrics, etc. run at order 1000

order > 1000

Business Rule before

Business Rule after

IamAmolB · ‎02-01-2016

HI Mike,

You mean to say the server side script will run first and after that the client side scripts will run?

Mike Allen · ‎02-01-2016

The server side query or display business rule runs first. That is during load of the record from the server side. Then client side scripts will pick up. The data policies. Then, before and after business rules.

Ravi Prasad1 · ‎02-01-2016

Hi Amol,

There are 2 types of scripts in service now.

Client side : Client script, Ui policy

Server side: Business rule, script include, Workflow scripts

So in client side first Client scripts will run then UI policies.

Server side Business rules will run based on type of script.

script includes will run whenever you call explicitly.

Go through the below article for clear details.

Differences Among Scripts - ServiceNow Wiki