I use the following convention:
public class EnumConvention : IPropertyConvention
{
public bool Accept(IProperty target)
{
if( target.PropertyType.IsEnum )
{
return true;
}
Type t = Nullable.GetUnderlyingType(target.PropertyType);
return t != null && t.IsEnum;
}
public void Apply(IProperty target)
{
if( Nullable.GetUnderlyingType(target.PropertyType) != null)
{
target.CustomTypeIs(target.PropertyType).Nullable();
}
else
{
target.CustomTypeIs(target.PropertyType).Not.Nullable();
}
}
}
-- Roelof.
On Sat, Apr 25, 2009 at 9:26 PM, harrychou <harryc...@gmail.com> wrote:
>
> Now I understands it. For mapping enum, you 'hard-code' your type to
> int, it will cause the object become dirty immediately.
>
> As explained in the following two posts:
>
>
> http://graysmatter.codivation.com/CommentView,guid,6fe1a7c3-1245-45b8-98f1-e4b369dcded9.aspx
>
> http://blog.benhartonline.com/post/2008/10/09/NHibernate-objects-dirty-on-load-with-nothing-set-in-between.aspx
>
> In my case, I am migrating my mapping from HBM to FluentNHibernate. In
> HBM, I can just ignore the type, and NHibernate will figure out the
> base type of my enum for me (which is int) ...
>
> Now in FluentNhibernate, if I didn't set CustomTypeIs, I am forced to
> map the column type of string .... which is not right ...
>
> Is there a way to work around this issue?
>
>
> On Apr 24, 3:00 pm, harrychou <harryc...@gmail.com> wrote:
> > I have a problem. Whenever I add a mapping with .CustomTypeIs(typeof
> > (int)), NHiberate thinks my object is dirty and try to update the
> > object for me. ...
> >
> > This is causing performance problem since FindAll call will cause
> > massive update statements ....
> >
> > The reason I use .CustomTypeIs(typeof(int)) is that I want my enum to
> > map to integer ...
> >
> > My mapping is like the following, whenever I uncommnet the last row
> > (Map(x => x.ContractType).CustomTypeIs(typeof(int));) I didn't get
> > the extra update statement. ....
> >
> > public ClientMap()
> > {
> > Id(x => x.ID, "ClientID").GeneratedBy.GuidComb();
> > Version(x => x.Version).SetAttribute("unsaved-value",
> > "-1");
> > Map(x => x.LastUpdatedDateTime);
> > Map(x => x.LastUpdatedUser);
> > Map(x => x.CreatedDateTime);
> > Map(x => x.CreatedUser);
> >
> > Map(x => x.SharePointID);
> > Map(x => x.BMC_ID);
> >
> > Map(x => x.ClientName);
> > Map(x => x.CompanyFullName);
> > Map(x => x.AlternativeNames);
> > Map(x => x.Acronym);
> > HasMany(x => x._CompanyAddress).Cascade.AllDeleteOrphan();
> > Map(x => x.RenewalMonth);
> > Map(x => x.Platform);
> > Map(x => x.IsActive);
> > Map(x => x.IsCareFirstConnectClient);
> > Map(x => x.InfoBoxEmail);
> >
> > HasMany(x =>
> > x._ClientRoleAssignments).Cascade.AllDeleteOrphan();
> >
> > HasMany(x => x._ClientContacts).Cascade.AllDeleteOrphan();
> >
> > Map(x => x.ContractType).CustomTypeIs(typeof(int));
> > }
> >
>
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