Set Default value and hide Service Catalog Variable based on condition

[Bianca1]

Follow up from: Add Advanced Reference Qualifier to Variable Set that is dependent on a Catalog Item field

In a Service Catalog(shown below) I am trying set a default value on the Product field when their is only one option from the reference table. I would also like to hide this variable or set it as a read-only field with the default option.

I have already added a reference qualifier(follow up link) to that field which will filter how many options are show. If there is more than one option, I want to do nothing.

I have been playing around with Business rules, Client Scripts and UI Policies, but none have been successful. Can anyone point me in the direct of the right script to write? 

Thank you.

[vkachineni]

Please remove initialize function from SI and give it a try.

[Bianca1]

That worked, thank you!

[vkachineni]

Awesome.