How to make fields on "Request Item" form read only if a particular request item was chosen?

[santrym]

I have a request item that, upon submitting a request for it, I would like its resulting "Request Item" form to have all it's fields made uneditable/read-only. Is there a way to do this without accidentally making all "Request Item" forms uneditable?

[Chuck Tomasi · Accepted solution]

Hi Michael,

You can do this with a UI policy. Use the condition field on the Catalog item field and add the fields to make read-only in the related list (after you save.)

Creating a UI Policy - ServiceNow Wiki

[santrym]

I wasn't able to figure out how to write an ACL on sc_req_item, so I used this method and it seems to be working great. Is this bad? Why exactly is Abhinay E's method more secure?

[Chuck Tomasi]

UI policies work on the client side. Because of this, anyone with a moderate amount of browser knowledge can change the behavior. Making a field read-only or mandatory can fairly easily be overridden.

ACLs, on the other hand are enforced at the server side and cannot be hacked.

Another option is to create a Data policy (the server side brother of a UI policy) to enforce the conditions on both ends. Data policies and UI policies can be made to work together quite easily.

Data Policy - ServiceNow Wiki

[Abhinay Erra]

Create a Write ACL on sc_req_item table and select the conditions, Item is not <the item you want the fields to be not editable>