c# - NHibernate.MappingException: No persister for: XYZ -

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now, before it: did google , hbm.xml file is embedded resource.

here code calling:

isession session = getcurrentsession(); var returnobject =  session.get<t>(id);

here mapping file class:

<?xml version="1.0" encoding="utf-8" ?> <hibernate-mapping xmlns="urn:nhibernate-mapping-2.2">   <class name="hqdata.objects.subcategory, hqdata" table="subcategory" lazy="true">     <id name="id" column="id" unsaved-value="0">       <generator class="identity" />     </id>      <property name="name" column="name" />     <property name="numberofbuckets" column="numberofbuckets"  />     <property name="searchcriteriaone" column="searchcriteriaone" />      <bag name="_businesses" cascade="all">       <key column="subcategoryid"/>       <one-to-many           class="hqdata.objects.business, hqdata"/>     </bag>      <bag name="_buckets" cascade="all">       <key column="subcategoryid"/>       <one-to-many          class="hqdata.objects.bucket, hqdata"/>     </bag>    </class> </hibernate-mapping>

has run issue before?

here full error message:

mappingexception: no persister for:  hqdata.objects.subcategory]nhibernate.impl.sessionfactoryimpl.getentitypersister(string entityname, boolean throwifnotfound)  in c:\csharp\nh2.0.0\nhibernate\src\nhibernate\impl\sessionfactoryimpl.cs:766 nhibernate.impl.sessionfactoryimpl.getentitypersister(string entityname)  in c:\csharp\nh2.0.0\nhibernate\src\nhibernate\impl\sessionfactoryimpl.cs:752 nhibernate.event.default.defaultloadeventlistener.onload(loadevent event, loadtype loadtype)  in c:\csharp\nh2.0.0\nhibernate\src\nhibernate\event\default\defaultloadeventlistener.cs:37 nhibernate.impl.sessionimpl.fireload(loadevent event, loadtype loadtype)  in c:\csharp\nh2.0.0\nhibernate\src\nhibernate\impl\sessionimpl.cs:2054 nhibernate.impl.sessionimpl.get(string entityname, object id)  in c:\csharp\nh2.0.0\nhibernate\src\nhibernate\impl\sessionimpl.cs:1029 nhibernate.impl.sessionimpl.get(type entityclass, object id)  in c:\csharp\nh2.0.0\nhibernate\src\nhibernate\impl\sessionimpl.cs:1020 nhibernate.impl.sessionimpl.get(object id)  in c:\csharp\nh2.0.0\nhibernate\src\nhibernate\impl\sessionimpl.cs:985 hqdata.dataaccessutils.nhibernateobjecthelper.loaddataobject(int32 id)  in c:\development\hqchannelrepo\hq channel application\hqchannel\hqdata\dataaccessutils\nhibernateobjecthelper.cs:42 hqwebsite.localsearch.get_subcategory()  in c:\development\hqchannelrepo\hq channel application\hqchannel\hqwebsite\localsearch.aspx.cs:17 hqwebsite.localsearch.page_load(object sender, eventargs e)  in c:\development\hqchannelrepo\hq channel application\hqchannel\hqwebsite\localsearch.aspx.cs:27 system.web.util.callihelper.eventargfunctioncaller(intptr fp, object o, object t, eventargs e) +15 system.web.util.callieventhandlerdelegateproxy.callback(object sender, eventargs e) +33 system.web.ui.control.onload(eventargs e) +99 system.web.ui.control.loadrecursive() +47 system.web.ui.page.processrequestmain(boolean includestagesbeforeasyncpoint, boolean includestagesafterasyncpoint) +1436

update, here's solution my scenario was: had changed code , wasn't adding assembly config file during runtime.

sounds forgot add mapping assembly session factory configuration..

if you're using app.config...

. .     <property name="show_sql">true</property>     <property name="query.substitutions">true 1, false 0, yes 'y', no 'n'</property>     <mapping assembly="project.domainmodel"/>  <!-- here --> </session-factory> . .

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