Sorting by many values on the test run history page results in "Data Error"

2010-09-23 22:32:04,682 [http-8080-2] ERROR errors.GrailsExceptionResolver  - Invalid path: 'testRunStatistics.tests' [from cuanto.TestRun t where t.project = ? order by testRunStatistics.tests asc]
org.hibernate.hql.ast.QuerySyntaxException: Invalid path: 'testRunStatistics.tests' [from cuanto.TestRun t where t.project = ? order by testRunStatistics.tests asc]
        at org.hibernate.hql.ast.QuerySyntaxException.convert(QuerySyntaxException.java:54)
        at org.hibernate.hql.ast.QuerySyntaxException.convert(QuerySyntaxException.java:47)
        at org.hibernate.hql.ast.ErrorCounter.throwQueryException(ErrorCounter.java:82)
        at org.hibernate.hql.ast.QueryTranslatorImpl.analyze(QueryTranslatorImpl.java:258)
        at org.hibernate.hql.ast.QueryTranslatorImpl.doCompile(QueryTranslatorImpl.java:183)
        at org.hibernate.hql.ast.QueryTranslatorImpl.compile(QueryTranslatorImpl.java:134)
        at org.hibernate.engine.query.HQLQueryPlan.<init>(HQLQueryPlan.java:101)
        at org.hibernate.engine.query.HQLQueryPlan.<init>(HQLQueryPlan.java:80)
        at org.hibernate.engine.query.QueryPlanCache.getHQLQueryPlan(QueryPlanCache.java:94)
        at org.hibernate.impl.AbstractSessionImpl.getHQLQueryPlan(AbstractSessionImpl.java:156)
        at org.hibernate.impl.AbstractSessionImpl.createQuery(AbstractSessionImpl.java:135)
        at org.hibernate.impl.SessionImpl.createQuery(SessionImpl.java:1650)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.springframework.orm.hibernate3.HibernateTemplate$CloseSuppressingInvocationHandler.invoke(HibernateTemplate.java:1282)
        at $Proxy9.createQuery(Unknown Source)
        at org.codehaus.groovy.grails.orm.hibernate.metaclass.ExecuteQueryPersistentMethod$1.doInHibernate(ExecuteQueryPersistentMethod.java:65)
        at org.springframework.orm.hibernate3.HibernateTemplate.doExecute(HibernateTemplate.java:406)
        at org.springframework.orm.hibernate3.HibernateTemplate.executeFind(HibernateTemplate.java:343)
        at org.codehaus.groovy.grails.orm.hibernate.metaclass.ExecuteQueryPersistentMethod.doInvokeInternal(ExecuteQueryPersistentMethod.java:63)
        at org.codehaus.groovy.grails.orm.hibernate.metaclass.AbstractStaticPersistentMethod.invoke(AbstractStaticPersistentMethod.java:64)
        at org.codehaus.groovy.grails.orm.hibernate.metaclass.AbstractStaticPersistentMethod.invoke(AbstractStaticPersistentMethod.java:57)
        at sun.reflect.GeneratedMethodAccessor256.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.codehaus.groovy.runtime.callsite.PojoMetaMethodSite$PojoCachedMethodSite.invoke(PojoMetaMethodSite.java:188)
        at org.codehaus.groovy.runtime.callsite.PojoMetaMethodSite.call(PojoMetaMethodSite.java:52)
        at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:133)
        at org.codehaus.groovy.grails.plugins.orm.hibernate.HibernatePluginSupport$_addQueryMethods_closure38.doCall(HibernatePluginSupport.groovy:600)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:86)
        at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:234)
        at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1049)
        at groovy.lang.ExpandoMetaClass.invokeMethod(ExpandoMetaClass.java:923)
        at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:880)
        at groovy.lang.Closure.call(Closure.java:279)
        at org.codehaus.groovy.runtime.metaclass.ClosureStaticMetaMethod.invoke(ClosureStaticMetaMethod.java:59)
        at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:234)
        at org.codehaus.groovy.runtime.callsite.StaticMetaMethodSite$StaticMetaMethodSiteNoUnwrap.invoke(StaticMetaMethodSite.java:130)
        at org.codehaus.groovy.runtime.callsite.StaticMetaMethodSite.call(StaticMetaMethodSite.java:88)
        at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:40)
        at org.codehaus.groovy.runtime.callsite.StaticMetaMethodSite.call(StaticMetaMethodSite.java:93)
        at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:133)
        at cuanto.DataService.getTestRunsByProject(DataService.groovy:98)