[nhibernate-issues] [JIRA] Closed: (NH-586) Alternative way to specify the type for select new

[NHibernate J. <mik...@us...>]

     [ http://jira.nhibernate.org/browse/NH-586?page=all ]
     
Sergey Koshcheyev closed NH-586:
--------------------------------

    Resolution: Fixed

Option 3 implemented in Beta2.

> Alternative way to specify the type for select new
> --------------------------------------------------
>
>          Key: NH-586
>          URL: http://jira.nhibernate.org/browse/NH-586
>      Project: NHibernate
>         Type: Improvement
>   Components: Core
>     Versions: 1.0.2
>     Reporter: Dragos Nuta

>
> I think that everybody agrees that adding the imports to mappings is kind of cumbersome. It is difficult to maintain and the fact that they cannot be specified in a dedicate mapping file is even more annoying in my opinion. What would you think of these alternative ways to specify the type for the mapping?
> 1. session.CreateQuery( "select new Dummy(o.f1, o.f2) from MyEntity o", typeof(Dummy) ).List();
> With this you can give the Type instance as a parameter
> 2. session.CreateQuery<Dummy>( "select new Dummy(o.f1, o.f2) from MyEntity o").List();
> With this you can use generics to return a typed object (with a known Type) and can also be used for normal queries to return typed lists.
> 3. session.CreateQuery( "select o.f1, o.f2 from MyEntity o" ).IntoDTO( typeof(Dummy) ).List();
> With this you express separately that the data will be obtained into a Dummy Type.
> 4. session.CreateQuery<Dummy>("select o.f1, o.f2 from MyEntity o").List();
> With this NH can look at the select clause and if Dummy is not persistent entity can treat it as a DTO a perform a select new.
> My favorite would be 1 or 3.
> Or least it would be great to add imports dynamically at run-time:
> sessionFactory.Imports.Add( "Dummy", typeof(Dummy) );
> What do you think?
> PS: Let me know if the change would be adopted because I can start working on it.

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