Is it possible to map private fields to table columns?

[Jyuart]

In clean architecture (DDD specifically), it's common to encapsulate your domain layer.

1. It should not have external dependencies (thus, no attributes, which are ugly either way, though)
2. The behavior itself is encapsulated, so instead of properties, we use private fields which can be changed only via publicly exposed methods that resemble domain logic

Before adding this library to the project, I thought the Field class was made specifically for that. But now it seems that it's not. It either doesn't work with fields or just doesn't pick up private ones.

Tell me, please, do I miss something obvious, or it's not possible to use the full-ORM side of RepoDb if all of my classes contain only private fields?

Basic example:

public class User
{
    public Guid UserId { get; }

    private readonly FullName _name;
    private readonly Email _email;

    public User(FullName name, Email email)
    {
        UserId = Guid.NewGuid();
        _name = name;
        _email = email;
    }
}

public class FullName
{
    private readonly string _firstName;
    private readonly string _lastName;

    public FullName(string firstName, string lastName)
    {
        _firstName = Guard.Against.NullOrWhiteSpace(firstName, nameof(_firstName));
        _lastName = Guard.Against.NullOrWhiteSpace(lastName, nameof(_lastName));
    }
}

I tried mapping like this (which is not perfect, but it'd be ok if it worked), but it doesn't work:

        FluentMapper
            .Entity<User>()
            .Table("users")
            .Column(x => x.UserId, "user_id");

        FluentMapper.Entity<FullName>()
            .Column(new Field("_firstName"), "first_name")
            .Column(new Field("_lastName"), "last_name");

        FluentMapper.Entity<Email>()
            .Column(new Field("_value"), "email");

[mikependon]

No, this is not possible. The hydration process onky succeed with columns projection to those writeable class properties or constructor parameters (with the same name as underlying table field).

[thabans]

would it be possible to have system call out to a method on set call with the sql value object so we can set this manually?

public class User {
  public void   OnSet(SqlExecuteReuslt result) {
        _name = result"first_name"};
 }
}

Configurations.Setup().CallMethodOnSet("OnSet");

[mikependon]

On your class FullName with ctor argument of firstName and lastName

public class FullName
{
    private readonly string _firstName;
    private readonly string _lastName;

    public FullName(string firstName, string lastName)
    {
        _firstName = Guard.Against.NullOrWhiteSpace(firstName, nameof(_firstName));
        _lastName = Guard.Against.NullOrWhiteSpace(lastName, nameof(_lastName));
    }
}

As there are projections defined on the ctor arguments during hydration, therefore, I would expect that this would work if the underlying table has the FirstName and LastName columns.