The discriminator *can't* be a property.

On Wed, May 4, 2011 at 6:18 AM, Luka <[email protected]> wrote:

> Hi,
> I have this scenarion:
>
> A table:
>
> Activity
> .Id : Guid
> .Type: int
> .Title: nvarchar(20)
> ...
>
> Classes
> public class Activity: Entity
> {
>    public virtual ActivityType Type {get;set;}
>    public virtual string Title {get;set;}
> }
>
> public class FormActivity: Activity
> {
>
> }
>
> and a mapping:
> mapper.Class<Activity>(map =>
>                                       {
>
> map.Discriminator(dm=>dm.Column("TYPE"));
>                                       });
>
> mapper.Subclass<FormActivity>(map=>map.DiscriminatorValue(ActivityType.Form));
>
> When building SessionFactory I get Exception
>
> System.InvalidOperationException: Sequence contains more than one
> matching element
> It throws when get on this line:
>
> mapper.Subclass<FormActivity>(map=>map.DiscriminatorValue(ActivityType.Form));
>
> what am I doing wrong?
>
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>


-- 
Fabio Maulo

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