Possibility to map bitmask to integer list and filter it

Hi,

is it possible to map a bitmask to an integer list and make filter operations to it?

    [PERSON]
    public class Person{
        [ExpressionMethod(nameof(MaskToList), IsColumn = true)]
        public List<int> PermissionList{ get; set;}
    
        public static Expression<Func<Person, List<int>>> MaskToList(){
              return p => new List<int>(){p.Permissions & 1, p.Permissions & 2, p.Permissions & 4};
        }
        [PERMISSIONS]
        public int Permissions{ get; set;}
    }


using(var db = new TestDb())
{
    var result = db.GetTable<Person>().PermissionList.Contains(2).ToList();
}

This does not work with the given code!

DB-Provider: Firebird 2.1 LingToDb: 2.7.4

[sdanyliv]

@Franki1986, everything is possible, if you can transform expression tree. I can, but i have not enough time for that. Implement IExpressionPreprocessor in your DataConnection class, and you can transform any expression in any parseable expression.

[frankiDotNet]

I know that this should not be part of this issue, but the DevExtreme team did extend their functionalities for custom filters:

Custom filters

@sdanyliv and @MaceWindu thanks for your help again!!!