Defining an entity property of type UUID throws the following exception during entity creation:

java.lang.IllegalArgumentException: Invalid UUID string: 

This is because the default value for UUIDs is UUIDFromString(""), but the empty string is not a valid UUID. Changing the default value to randomUUID() works. In case the default value is not supposed to be random it can also be changed into a fixed value of UUIDFromString("00000000-0000-0000-0000-000000000000"). The default value can be changed in rule type-default-value in /src/org/webdsl/dsl/modules/types/UUID.str

Example:

application test
entity Ent { prop :: UUID }
page root() { var e := Ent{}; }

Submitted by Christoffer Gersen on 18 December 2012 at 15:06

Using randomUUID() as default in r5578.