Question

So I already have everything mapped out in my edmx file
I created the following

 public sealed class ACategory:example.org.Data.Categories
{
    public ACategory()
    {

    }

    public int PostingCount
    {
        get;
        set;
    }
}

I then decided to figure out how to do a compiled query, just cause it seems cool as hell to do.

public static Func<MyEntities, IQueryable<ACategory>> GetCategoriesWithPostingCount =
        CompiledQuery.Compile((MyEntities entities) => from category in entities.Categories.Include("Postings_Categories")
                                                               select new ACategory
                                                               {
                                                                   CategoryID =category.CategoryID,
                                                                   ParentCategoryID = category.ParentCategoryID,
                                                                   CategoryName = category.CategoryName,
                                                                   CategoryDescription = category.CategoryDescription,
                                                                   PostingCount = category.Postings_Categories.Count
                                                               });

It freakin works… way cool I can now call this easily from anywhere.

My question now is this? Is this a good way to do this or am I making a mistake on something that could be lurking behind the scenes?

Answer 1

If you do this, you have to expose your data context. This is not a problem if you are using the compiled query in your DAL alone, but is something to think about. It is a concise way to create business objects, though!