Validating Custom fields against an external datasource

RT Users
1

I have a auto-complete custom field with its data coming from an web
service
The reason for the auto-complete is to prevent users from searching through
the long list of data.

I would like to know if custom validation can be created to validate the
entry in the custom field against an external data source such as a web
service and display a error message.

Is this type of validation possible ?

Thanks,
Kenroy

2

I have a auto-complete custom field with its data coming from an web service
The reason for the auto-complete is to prevent users from searching through the long list of
data.
I would like to know if custom validation can be created to validate the entry in the custom
field against an external data source such as a web service and display a error message.

You may find it easier to source the data externally first:
http://bestpractical.com/docs/rt/latest/extending/external_custom_fields.html

But you could also validate on submission, there are callbacks in
place.

-kevin