NHibernate generating unique document numbers

Question

SQL

Colleagues,

Faced a problem how to generate unique document numbers using NHIbernate. For example, I need to generate a unique order number within a year. Tell me how best to do this?

Answer 1

Use the UUID to generate a unique id, and store it in the field for the class. In dotnet it looks like this: System.Guid.NewGuid().ToString()

Answer 2

No, GUID doesn't work, it's the same as using ID as a number. But this is not all.