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POC# mvc2 nhibernate problem
 

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    <p>I've got the following mapping in my application. The mapping is generated, by a custom tool. Other mappings generated work ok, but this one is giving me a strange error which I don't understand.</p> <p>This is the mapping;</p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;!--Generated by NHibernate.Mapping.Attributes on 2010-10-29 08:39:48Z.--&gt; &lt;hibernate-mapping xmlns="urn:nhibernate-mapping-2.2"&gt; &lt;class name="Plugin.Twitter.Business.Entities.Tweet, Plugin.Twitter" table="PluginTwitter_Tweet"&gt; &lt;id name="Id" column="Id"&gt; &lt;generator class="guid" /&gt; &lt;/id&gt; &lt;property name="TweetMessage" /&gt; &lt;property name="TweetDate" /&gt; &lt;property name="TweetId" /&gt; &lt;/class&gt; &lt;/hibernate-mapping&gt; </code></pre> <p>This is the error which i'm getting in the browser when i trying to open the website containing the mapping file; <img src="https://i.stack.imgur.com/7NbeM.png" alt="Mapping Error"></p> <p>The stacktrace with it is as below;</p> <pre><code>[InvalidOperationException: Could not find the dialect in the configuration] NHibernate.Dialect.Dialect.GetDialect(IDictionary 2 props) +204 NHibernate.Cfg.Configuration.AddValidatedDocument(NamedXmlDocument doc) +155 [MappingException: Could not compile the mapping document: Plugin.Twitter.Business.Entities.Hbm.Tweet.hbm.xml] NHibernate.Cfg.Configuration.AddValidatedDocument(NamedXmlDocument doc) +534 NHibernate.Cfg.Configuration.AddInputStream(Stream xmlInputStream, String name) +378 NHibernate.Cfg.Configuration.AddResource(String path, Assembly assembly) +419 NHibernate.Cfg.Configuration.AddAssembly(Assembly assembly) +355 NHibernate.Cfg.Configuration.AddAssembly(String assemblyName) +291 CMS.ResourceAccess.DataAccessLogic.SessionManagement.SessionManager..ctor() in C:\Projects\Website\Website.ResourceAccess\DataAccessLogic\SessionManagement\SessionManager.cs:73 Website.ResourceAccess.DataAccessLogic.SessionManagement.NestedSessionManager..cctor() in C:\Projects\Website\Website.ResourceAccess\DataAccessLogic\SessionManagement\SessionManager.cs:90 [TypeInitializationException: The type initializer for 'NestedSessionManager' threw an exception.] Website.ResourceAccess.DataAccessLogic.SessionManagement.SessionManager.get_Instance() in C:\Projects\Website\Website.ResourceAccess\DataAccessLogic\SessionManagement\SessionManager.cs:39 CMS.ResourceAccess.DataAccessLogic.SessionManagement.SessionManager.get_SessionFactory() in C:\Projects\Website\Website.ResourceAccess\DataAccessLogic\SessionManagement\SessionManager.cs:23 Website.Backend.MvcApplication.StartNHibernateSession() in C:\Projects\Website\Website.Web\Global.asax.cs:82 Website.Backend.MvcApplication.Application_Start() in C:\Projects\Website\Website.Web\Global.asax.cs:47 [HttpException (0x80004005): The type initializer for 'NestedSessionManager' threw an exception.] System.Web.HttpApplicationFactory.EnsureAppStartCalledForIntegratedMode(HttpContext context, HttpApplication app) +3988565 System.Web.HttpApplication.RegisterEventSubscriptionsWithIIS(IntPtr appContext, HttpContext context, MethodInfo[] handlers) +191 System.Web.HttpApplication.InitSpecial(HttpApplicationState state, MethodInfo[] handlers, IntPtr appContext, HttpContext context) +325 System.Web.HttpApplicationFactory.GetSpecialApplicationInstance(IntPtr appContext, HttpContext context) +407 System.Web.Hosting.PipelineRuntime.InitializeApplication(IntPtr appContext) +375 [HttpException (0x80004005): The type initializer for 'NestedSessionManager' threw an exception.] System.Web.HttpRuntime.FirstRequestInit(HttpContext context) +11529072 System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext context) +141 System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest wr, HttpContext context) +4784373 </code></pre> <p>I think the import thing to notice is that the exception i'm getting is an mapping exception as shown with this rule;</p> <pre><code>MappingException: Could not compile the mapping document: Plugin.Twitter.Business.Entities.Hbm.Tweet.hbm.xml] </code></pre> <p>I don't understand how and why though so I hope someone can tell me what the error means and how I can fix this issue. I've got the mapping marked as embedded resource.</p> <p>UPDATE: We're using the following hibernate.cfg.xml file in the application.</p> <pre><code>&lt;?xml version="1.0" encoding="utf-8" ?&gt; &lt;hibernate-configuration xmlns='urn:nhibernate-configuration-2.2'&gt; &lt;session-factory&gt; &lt;property name="show_sql"&gt;true&lt;/property&gt; &lt;property name="dialect"&gt;NHibernate.Dialect.MsSql2008Dialect&lt;/property&gt; &lt;property name="connection.driver_class"&gt;NHibernate.Driver.SqlClientDriver&lt;/property&gt; &lt;property name="connection.connection_string_name"&gt;NHibernate&lt;/property&gt; &lt;property name="current_session_context_class"&gt;managed_web&lt;/property&gt; &lt;property name='proxyfactory.factory_class'&gt;NHibernate.ByteCode.LinFu.ProxyFactoryFactory, NHibernate.ByteCode.LinFu&lt;/property&gt; &lt;!--Needed for NH Profiler--&gt; &lt;property name="generate_statistics"&gt;false&lt;/property&gt; &lt;/session-factory&gt; &lt;/hibernate-configuration&gt; </code></pre>
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