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Asked: 2026-05-22T23:45:08+00:00

Since upgrading from NH 3.0 to 3.1 I’ve been having some trouble using the

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Since upgrading from NH 3.0 to 3.1 I’ve been having some trouble using the following code:

 criteria = session.CreateCriteria<User>()
    .Add(SqlExpression.InG<User, int>(user => user.ID, toBeFechted)); // toBefetched is an IList<int>

This will compile fine but when running it I get an exception as soon as I add the In condition to the criteria.

System.MissingMethodException : Method not found: NHibernate.Criterion.AbstractCriterion NHibernate.Criterion.Restrictions.InG(System.String, System.Collections.Generic.ICollection1<**UNKNOWN TYPE**>).
at NHibernate.LambdaExtensions.SqlExpression.InG(Expression1 expression, ICollection`1 values)

I can rebuild the query using QueryOver instead of Criteria and it will work, but doing that requires digging up alot of code that I don’t have the time to do. Using NH 3.0 I did not have the problem.

Has something changed in NH 3.1 or am I having some weird dll problem?

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1 Answer

  1. Editorial Team

    If you are using the Googlecode older style NH Lambda Extensions which were built on NH 2.1 assemblies, you have 2 options; – you can downgrade to 3.0 as you have or you can download the sourcecode and compile against the later binaries.

    If you dont want to do this, I have a copy of NHlambdaextensions built against NH3.1, which includes all of the original tests passing to give you some coverage

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