Comments on: Parameter lists in NHibernate

By: Javier Callico

Javier Callico — Thu, 21 Jul 2011 20:27:00 +0000

I as well was building the IN list myself until I found your article. It works great. The generated sql for a list containing two values looks like this: ‘… where event0_.Code in (@p0 , @p1)’,@p0=N’Test’,@p1=N’Test2′

By: Rich

Rich — Mon, 02 Nov 2009 16:20:34 +0000

Just as a heads up, there seems to be some bugs using empty lists and null lists using the SetParameterList. If you change to use Criteria, then it’ll work fine.

By: bogardj

bogardj — Wed, 28 Jan 2009 01:32:25 +0000

@chris

Good, cause I was stumped!

By: chris

chris — Tue, 27 Jan 2009 22:44:49 +0000

Figured it out…

needed to add a bag to the Categories
use a CreateCritera and InExpression

Thanks again!

By: chris

chris — Tue, 27 Jan 2009 21:08:23 +0000

I hate asking for help on blog posts but this is so close…

From your example above, using the criteria API. How would I get a list of categories given a list of products.

Thanks for your time!

By: Jimmy Bogard

Jimmy Bogard — Mon, 01 Sep 2008 17:28:22 +0000

@Nathan

Try using the “join” LINQ clause. I’m not sure if the Linq to NH developers support this use, but I’ve seen examples for other IQueryProvider implementations.

By: Nathan

Nathan — Sun, 31 Aug 2008 06:27:27 +0000

Any idea if there is a LINQ for NH syntax to accomplish the same thing. We’re humming along using LINQ but have to drop down to HQL for these pesky IN style queries.

By: Jimmy Bogard

Jimmy Bogard — Thu, 28 Aug 2008 02:44:14 +0000

@Ted

No, it creates parameters for each value for you. I forgot to include the SQL generated in the post.

By: Ted

Ted — Wed, 27 Aug 2008 12:33:37 +0000

Can you use parameters in an in clause? Or does it just produce something like:
SELECT * from Products
WHERE CATEGORY IN (1,2)

By: Ray

Ray — Wed, 27 Aug 2008 06:33:39 +0000

Oh boy… Jimmy you not the only one… Thanks for sharing!