The unique
validator is part of the cborm module. So make sure that the cborm
module is installed first.
The validator is mapped into WireBox as UniqueValidator@cborm
so you can use in your constraints like so:
If you will be using this validator, then the name of the property has to be EXACTLY the same case as the constraint name. To do this, use single or double quotes to declare the constraint name. Please see example below.
This is done because we build the appropriate SQL to make sure the property name and the field name match.