I just started looking into NHibernate.Validator and love the
integration it has with NHibernate. I do have a question though.
I see many examples of how to perform validation using NHV on a newly
created entity like so:
Customer customer = new Customer();
...
customer.Phone = "343-343-343"; //INVALID VALUE
customer.Zip = "34334"; //INVALID VALUE
ValidatorEngine validator = new ValidatorEngine();
if (validator.IsValid(customer))
{
repo.Save(customer);
}
But I can't find an example of performing validation on an entity
retrieved from a repository and then updated. ex:
Customer customer = repo.Get(1);
...
customer.Phone = "343-343-343"; //INVALID VALUE
foreach (InvalidValue error in validatorEngine.Validate(customer))
{
// display the errors...
}
from here I can retrieve the validation errors no problem but the
customer entity is now dirty and my unit of work will try to flush/
commit the changes which causes an InvalidStateException. I don't
want to handle this exception here as it is assumed I've already
realized the entity is invalid and handled the validation errors as
desired.
Now from here I see a couple of options that I don't like:
1. I could swallow all InvalidStateExceptions
2. I could set some global error state when a validation error has
been found by the validation engine and then always check this global
error state before flushing/committing within my UOW.
Am I missing something here?
Any insight would be greatly appreciated. Thanks!
Gary Brunton
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