OrderBy with mapped EF entity property not working because of RestrictOrderByToPropertyOrField

[bzaugt]

Using this with Entity Framework 8 (and sql server), OrderBy does not work when an entity property is a mapped column.

Example entity:

[Table("Invoices")]
public partial class Invoice
{
    public int Id { get; set; }

    [Column("DatePaid")] // property is mapped to the column "DatePaid" in the database
    public DateTime? PaymentDate { get; set; }
}

Then running OrderBy:

var invoices = context.Invoices;
var config = new ParsingConfig()
{
    // this is the default value, but setting it explicitly here for clarity
    RestrictOrderByToPropertyOrField = true
};
var orderedQuery = invoices.OrderBy(config, "x => x.PaymentDate == null ? 1 : 2");

Expected result: Using the default configuration, I would expect the property to be parsed and mapped correctly.

Actual result: This results in a ParseException with message: No property or field 'null' exists in type 'Invoice'

When setting RestrictOrderByToPropertyOrField to false, it works.

Also See #927