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Editorial Team
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Asked: 2026-05-11T22:47:06+00:00

Using NHibernate, is it possible to fill an existing object using the results of

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Using NHibernate, is it possible to fill an existing object using the results of a query, rather than returning a new entity? For example:

var foo = new Foo();
session.GetById(foo, id);
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1 Answer

  1. Editorial Team

    Well… kind of… If you object is transient you can Session.Get<Foo>(id) another object into NH identity map and then manually copy its fields into your object. If your object is persistent (attached to a session), you can Session.Refresh(foo) to re-retrieve it from DB.

    I guess you can try doing Session.Lock on your transient instance to reattach it to the session and then Session.Refresh to refresh it… Should work… at least in theory…

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