Abstract Property / Polymorphismus

Hello,

I have an abstract Property in my Row-Projection e. g.

abstract class AbstractArticleData 
{
  public int ArticleId {get;set;}
}

class Article {
  public int ArticleId {get;set;}
  public AbstractArticleData SpecialData {get;set;}
}

class ArticleData : AbstractArticleData {
 // Other Properties
}

There is a “double” projection, first I project ArticleRow to Article, then I Project new { Article, ArticleData } to Article again.

At this moment I can’t provide a testcase, but I think Linq2DB can’t handle abstract Data types in genereal, because he wants to instantiate AbstractArticleData which results in a System.Linq Exception.

Any Ideas how I can extend Linq2DB to instantiate the correct data type (ArticleData)?

[sdanyliv]

@Fruchuxs, sorry not yet. Will handle this next week, currently i’m too busy with main work.

[sdanyliv]

@Fruchuxs, i see looks like you don’t need inheriatance mapping, but just want to easy switch between options which ancestor needs to be intstantiated. There is no option for now, but can be emulated by inheritance mapping.

Inheriatnce mapping is trying to instantiate different classes from the same table based on value of Discriminator Column.

Will try to find solution for you later.