Hibernate version: 1.0.2

I have just uploaded my application to my hosting provider and got the following error.

"System.Security.SecurityException: That assembly does not allow partially trusted callers."

After investigation it appears the problem lies with NHibernate and that it will only work in "Full Trust" mode.

Has anybody else experienced this problem and gotten around it?

btw: my hosting provider only allow medium trust

You can recompile NH to add AllowPartiallyTrustedCallersAttribute to it. The soon-to-be-stable version of NHibernate (1.2.0.CR1) has the attribute set and includes an example that works under medium trust.

Note that proxies (lazy loading) do not work under medium trust in either version because DynamicProxy doesn't support it.

Sergey,

I know it's a rather long shot, but a solution may be to generate the proxy assembly at design time using a custom tool and then instruct NH to use the proxies from a given dll using a custom naming policy.

Eg. when a proxy is needed for automatically search for proxy

Another idea would be to create a tool that takes as input a set of DLLs and that creates the proxies automatically, and this tool can than be use with setups.

What do you think, does this deserve any attention ?

Yes, this could be a solution.

Hi,

I also had the problem making NHibernate work with medium trust and this is what I did:

First..you need some sort of hosting that allows reflection in your server...There are some like crystaltech.com which will allow you to use reflection (in shared hosting) as long as it is used for assemblies within your designated app folder.

Second...

Download the Castle.DynamicProxy-vs2005 project. NHibernate ships with the dll, but you will need to modify the assembly to allow lazy loading under medium trust. Once you have the assembly, make sure nhibernate references this assembly and not the old dll.

Open the Castle.DynamicProxy-vs2005 project and look for the ModuleScope.cs file (it is right in the main directory). There look for the method:
private AssemblyName GetAssemblyName (bool signStrongName)
In there comment out the following code:

if (signStrongName)
{
byte[] keyPairStream = GetKeyPair();

if (keyPairStream != null)
{
assemblyName.KeyPair = new StrongNameKeyPair(keyPairStream);
}
}




Now give it a shot.

Mario