public class ReportQueryProvider<TCriteria, TModel> : IReportQueryProvider<TCriteria, TModel>
    where TModel : class, IReportable<TModel>
    where TCriteria : ReportCriteria
{
    public Expression<Func<TModel, bool>> Filter(TCriteria criteria)
    {
        var a = PredicateBuilder.New<TModel>();
        if (criteria.StartDateObject!=null)
            a = a.And(x => x.date >= criteria.StartDateObject);

        if (criteria.EndDateObject != null)
            a = a.And(x => x.date <= criteria.EndDateObject);

        var userFilter = QueryExtensions.UserCommonFilter(criteria);
        a = a.And(m => userFilter.Invoke(m.FilterUser));
        return a;
    }
}

public partial class Dis_UserTransactions : IReportable<Dis_UserTransactions>
{
    private static readonly CompiledExpression<Dis_UserTransactions, User> filterUserExpression
        = DefaultTranslationOf<Dis_UserTransactions>.Property(e => e.FilterUser).Is(e => e.User1);

    static Dis_UserTransactions()
    {
    }

    [NotMapped]
    public User FilterUser => filterUserExpression.Evaluate(this);
}