Why map it at all? The point of the mapping is to map domain properties to
table columns. If this is just a convenience method for your domain layer,
you shouldn't have to map it all.
On Monday, April 23, 2012, s-stude wrote:
> Hi.
>
> I'm using Nhibernate 3.2.0.4000 and FluentNHibernate 1.3.0.717.
>
> I have next Entity
>
> public class Topic : EntityBase
> {
> private readonly ICollection<Vote> _votes;
>
> public virtual string Title { get; protected set; }
> public virtual User CreatedBy { get; protected set; }
> public virtual ICollection<Vote> Votes
> {
> get { return _votes; }
> }
>
> public virtual int VotedUpCount
> {
> get
> {
> return _votes.Count(v => v.VotedTo ==
> VoteType.VoteUp);
> }
> }
>
> // ....
> }
>
> I need to map VotedUpCount because I get an error. But I don't need
> this column in my table. I just want to get real-world domain entity.
>
> I tried this one:
>
> public class TopicMap : ClassMap<Topic>
> {
> public TopicMap()
> {
> Id(x => x.Id);
> Map(x => x.Title);
> Map(x => x.VotedUpCount).Access.ReadOnly();
> Map(x => x.VotedDownCount).Access.ReadOnly();
> References(x => x.CreatedBy);
> HasMany<Vote>(x => x.Votes)
> .Cascade.All();
> }
> }
>
> But I recieve an error Invalid column name 'VotedUpCount'.
> Is there any way to map it in the proper way?
>
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