擴展持久性CFC時出現NullPointerException

Question

嘗試擴展具有縣的Unit時發生錯誤，特別是在重新啓動應用程序以初始化ORM時。 [注：我試圖單表繼承]

ORM是管理我的DB模式：this.ormsettings.dbcreate=dropcreate

當我從車型目錄中刪除County.cfc，ORM初始化和應用程序正常啓動。當我將County.cfc放回模型目錄時，錯誤再次發生。

的ColdFusion版本10,282462 MSSQL IIS

單位：

<cfcomponent persistent="true" entityname="Unit" table="Units" discriminatorColumn="type"> 
    <cfproperty name="id" fieldtype="id" column="unit_id" generator="identity"> 
    <cfproperty name="name" default="" type="string" length="50"> 
    <cfproperty name="description" type="string" sqltype="varchar(max)" default=""> 
    <cfproperty name="active" type="boolean" default="true"> 
</cfcomponent> 

縣：

<cfcomponent persistent="true" entityname="County" table="Units" extends="Unit" discriminatorValue="county"> 
    <cfproperty name="officeAddress" type="string"> 
</cfcomponent> 

堆棧跟蹤：

java.lang.NullPointerException at 
org.hibernate.mapping.PersistentClass.createPrimaryKey(PersistentClass.java:322) at 
org.hibernate.cfg.HbmBinder.bindRootPersistentClassCommonValues(HbmBinder.java:405) at 
org.hibernate.cfg.HbmBinder.bindRootClass(HbmBinder.java:321) at 
org.hibernate.cfg.HbmBinder.bindRoot(HbmBinder.java:172) at 
org.hibernate.cfg.Configuration.add(Configuration.java:771) at 
org.hibernate.cfg.Configuration.addDocument(Configuration.java:586) at 
coldfusion.orm.hibernate.HibernateConfiguration.buildConfiguration(HibernateConfiguration.java:611) at 
coldfusion.orm.hibernate.HibernateConfiguration.initHibernateConfiguration(HibernateConfiguration.java:208) at 
coldfusion.orm.hibernate.HibernateConfiguration.<init>(HibernateConfiguration.java:181) at 
coldfusion.orm.hibernate.ConfigurationManager.initConfiguration(ConfigurationManager.java:67) at 
coldfusion.orm.hibernate.HibernateProvider.InitializeORMForApplication(HibernateProvider.java:185) at 
coldfusion.orm.hibernate.HibernateProvider.onPageRequestStart(HibernateProvider.java:151) at 
coldfusion.filter.ApplicationFilter.firePageRequestStart(ApplicationFilter.java:599) at 
coldfusion.filter.ApplicationFilter.invoke(ApplicationFilter.java:407) at 
coldfusion.filter.RequestMonitorFilter.invoke(RequestMonitorFilter.java:48) at 
coldfusion.filter.MonitoringFilter.invoke(MonitoringFilter.java:40) at 
coldfusion.filter.PathFilter.invoke(PathFilter.java:112) at 
coldfusion.filter.ExceptionFilter.invoke(ExceptionFilter.java:94) at 
coldfusion.filter.BrowserDebugFilter.invoke(BrowserDebugFilter.java:79) at 
coldfusion.filter.ClientScopePersistenceFilter.invoke(ClientScopePersistenceFilter.java:28) at 
coldfusion.filter.BrowserFilter.invoke(BrowserFilter.java:38) at 
coldfusion.filter.NoCacheFilter.invoke(NoCacheFilter.java:46) at 
coldfusion.filter.GlobalsFilter.invoke(GlobalsFilter.java:38) at 
coldfusion.filter.DatasourceFilter.invoke(DatasourceFilter.java:22) at 
coldfusion.filter.CachingFilter.invoke(CachingFilter.java:62) at 
coldfusion.CfmServlet.service(CfmServlet.java:204) at 
coldfusion.bootstrap.BootstrapServlet.service(BootstrapServlet.java:89) at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305) at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) at 
coldfusion.monitor.event.MonitoringServletFilter.doFilter(MonitoringServletFilter.java:42) at coldfusion.bootstrap.BootstrapFilter.doFilter(BootstrapFilter.java:46) at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243) at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) at 
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:224) at 
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:169) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472) at 
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168) at 
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98) at 
org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:928) at 
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118) at 
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:414) at 
org.apache.coyote.ajp.AjpProcessor.process(AjpProcessor.java:203) at 
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:539) at 
org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:298) at 
java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) at 
java.lang.Thread.run(Thread.java:662) 

奇怪的是，我已經在做與其他實體（DiscussionPost擴展後），類似的事情：

帖子：

<cfcomponent persistent="true" entityname="Post" table="Posts" discriminatorColumn="type"> 
    <cfproperty name="id" fieldtype="id" column="post_id" generator="identity"> 
    <cfproperty name="promotions" fieldtype="one-to-many" cfc="PostPromotion" fkcolumn="post_id" singularname="promotion"> 
    <cfproperty name="comments" fieldtype="one-to-many" cfc="PostComment" fkcolumn="post_id" singularname="comment">  
    <cfproperty name="user" fieldtype="many-to-one" cfc="User" fkcolumn="user_id"> 
    <cfproperty name="text" type="string" sqltype="varchar(1000)"> 
    <cfproperty name="timestamp" type="date" ormtype="timestamp"> 
</cfcomponent> 

DiscussionPost：

<cfcomponent persistent="true" entityname="DiscussionPost" table="Posts" extends="Post" discriminatorValue="discussionpost"> 
    <cfproperty name="discussion" fieldtype="many-to-one" cfc="Discussion" fkcolumn="discussion_id"> 
    <cfproperty name="title" type="string" sqltype="varchar(200)"> 

</cfcomponent> 

我缺少什麼？

Answer 1

好的。事實證明，這個答案非常簡單。通過執行全局搜索並替換我的代碼庫，用'container'替換'unit'，我能夠在應用程序中獲得單一表繼承以正常工作。認真。這就是我所做的一切，併發揮作用。 '單位'顯然不是CF中的保留字，因爲實體Unit獨立工作，但它在一些內部過程中一定會導致問題（也許在@MikeCauser建議的getColumnIterator()中）。

感謝大家的建議。

編輯：這原來是一個附帶的修復程序，而不是針對問題的根源，無論可能是什麼修復。真正的解決方案仍有待發現。

編輯2：我相信現在手頭上的問題不得不做在ColdFusion/Hibernate的，僅僅需要由ColdFusion服務的重新啓動被刷新內部。

是的，在我的桌子上撞了兩個星期後，我重新啓動了ColdFusion應用程序服務，並解決了我的問題。從那時起，我已經擴展了容器組件3次。一切都顯得很好，我已經繼續我的申請。

Answer 2

看起來你可能會丟失在County.cfc

爲officeAddress財產SQLTYPE屬性這是否解決問題了嗎？

Answer 3

看起來這可能是你所遇到的問題：https://hibernate.onjira.com/browse/HBX-54

我認爲解決方法是一個id屬性添加到County.cfc：

<cfproperty name="id" fieldtype="id" column="county_id" generator="identity"> 

上面的代碼假定您的ID列被命名爲「county_id」。這能解決你的問題嗎？