Question

i´m using LINQ with the subsonic in a class to get my data here is the code below:

public IQueryable<Veiculo> SelecionaVeiculosSite() 
        {
                   return (from v in _db.Veiculos
                            where v.Ativo == true &&
                            v.Marca.Ativo == true && 
                            v.Modelo.Ativo == true
                            select v
                           );            

        }

You will see one difference in line at “v.Marca.Ativo == true”, I did one modification in template of ActiveRecord to get a and not a IQueryable. That the way i founded to make Classes relations based on the Foreign Keys of my database.

This is the code modified in the template (generated):

public Marca Marca
        {
            get
            {

                  var repo=OKMMySql.Marca.GetRepo();
                  return (from items in repo.GetAll()
                       where items.ID_Marca == _ID_Marca
                       select items).SingleOrDefault();
            }
        }

in the Code it´s ok, but this Select return this Execution time Error:

The binary operator Equal is not
defined for the types
‘System.Nullable`1[System.Int32]’ and
‘System.Int32’.

Anybody have any idea or anything to help my with this?

Many Thanks

Answer 1

One of your columns is nullable, it would seem. Go look in the class generated and see which one it is, or look at your database schema.

If it doesn’t need to be nullable, then just remove that from the column and re-run the .tt file.