Actually I lied
I think I can get this example to work...
The one I can't get to work is in fact in some sense simpler
Class Expression
{
}
Class FunctionalExpression : Expression
{
Public Expression parameterExpression;
}
(I suppose there's a clue there to a solution...i.e. if I separate the
parameterExpression into another 'entity'...then it will work like the
ListExpression example....but the point really is that I don't
understand why it actually doesn't work)
P.S.
Is it just me that finds both the error messages and the "Mapping
Detail" window incomprehensible?
> -----Original Message-----
> From: Discussion of advanced .NET topics. [mailto:ADVANCED-
> [EMAIL PROTECTED] On Behalf Of Nicholls, Mark
> Sent: 29 August 2008 10:31
> To: ADVANCED-DOTNET@DISCUSS.DEVELOP.COM
> Subject: [ADVANCED-DOTNET] Struggling with the entity framework.....
>
> Has anyone managed to get anything that is not completely trivial to
work?
>
> I've done an msdn walkthrough with courses and departments...seemed to
> work, and implemented a very simlpe inheritance of course.
>
> Problem now is that if I try to create something myself with is one
step
> up from completely trivial, I get things like...
>
> "Problem in Mapping Fragment starting at line 249: Potential runtime
> violation of table" ...bla bla bla
>
> Is it me? or is this a beta in release clothing?
>
> My slightly non trivial case is just...(in class terms)...
>
> class Expression
> {
> }
>
> class ListExpression : Expression
> {
> }
>
> class ListExpressionElement
> {
> public Expression expression;
> public ListExpression isMemberOfList;
> }
>
> i.e. a pretty simple recursive composite pattern.
>
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