Question

I recently started working with ServiceStack and its ORMLite framework. I have searched on Google and browsed the source code but couldn’t find anything relevent.

Is there any way to select specific columns when executing a query with ORMLite ?
Something like that : Db.First<Model>(q => q.Id == someId, "Column1, Column2")

Unless I missed this feature, I am surprised nobody asked about this before, since this is one the rule of thumbs to optimize your DB transactions.

Answer 1

If you want to specify columns other that the table you need to use SQL as seen in this earlier example

So in your case you could do something like:

Db.First<Model>("SELECT Column1, Column2 FROM AnyTableOrView");

You can also create a partial model that looks at your table by decorating it with the [Alias] attribute, like:

[Alias("AnyTableOrView")]
public class Model {
    public int Id { get; set; }
    public string Column1 { get; set; }
    public string Column2 { get; set; }
}

Then you can do something like:

Db.First<Model>(q => q.Id == someId);

And it will only SELECT + populate fields from the partial model.