Why there is no simpler way to do Basic Projection when querying by ID?

[Plamen Boudinov]

Basic projection is something you can do while Querying:

var results = session .Query<Employee, Employees_ByFirstAndLastName>()

.Where(x => x.ID == SomeId) .Select(x => new { FirstName = x.FirstName, LastName = x.LastName }) .ToList();

Is this the only way to fetch couple of fields, without explicitly creating a transformer - by querying an index which has ID field included explicitly?

Thanks

[Oren Eini (Ayende Rahien)]

You want to do that by id, as part of the load?

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[Plamen Boudinov]

Yea, but i see it does not make sense to be using the Load method, maybe some method, like QueryById that returns RavenQueriable?

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[Kijana Woodard]

Sounds like you're looking for Load with a Transformer, but instead using the Select linq syntax. 

Are you doing this to reduce the number of bytes going across the network?

ref:

https://ravendb.net/docs/article-page/3.5/csharp/client-api/session/loading-entities

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[Plamen Boudinov]

Yea, that is the reason. And having to declare an explicit transformers for all scenarios is a bit cumbersome, where you have the convenience Select projection with Query.

[Oren Eini (Ayende Rahien)]

You can use a transformer that takes parameters, then just use that.

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[Kijana Woodard]

 @Oren, what do you mean? A generic transformer that takes a select list as a parameter?

[Oren Eini (Ayende Rahien)]

Yes, see here: https://ravendb.net/docs/article-page/3.5/Csharp/transformers/passing-parameters