Question

I’m looking into a project using nhibernate and I have a question on how to best accomplish the following scenario, using FluentNhibernate 1.0.0.593, and NHibernate 2.1.0.4000

My tables look like this:

DeviationLog:  
  Id uniqueidentifier  
  DeviationType uniqueidentifier  
  IncomingMessageId uniqueidentifier  

DeviationType:  
  Id uniqueidentifier  
  DeviationTypeCategory uniqueidentifier  
  DeviationMessage nvarchar(255)  

DeviationTypeCategory:  
  Id uniqueidentifier  
  DeviationTypeCategoryName nvarchar(255)  

I am currently making use of automapping with conventions.

When I create an instance of Deviation, I would like to be able to do something like the following:

var deviation = new Deviation{DeviationType=DeviationEnum.NoMatchMobileNumber}; 

Now as far as I know enums only support integral types, so this won’t work without an alternative approach. I was thinking of maybe using a dictionary to this, like Dictionary<DeviationEnum,Guid>, and I also suspect I might need to make use of UserTypeConvention<T> to make this work somehow.

Anyone got experiences to share?

Answer 1

What I’ve traditionally done is use a custom IUserType class that would translate between the enum in question and how it would be persisted. However, this required a custom IUserType per enum type.