我有以下 hibernate xml 映射文件段。
<list name="networks" cascade="all"> <key column="parent_id"/> <one-to-many class="Network"/> </list>
它产生了以下异常,为什么?它确实具有上述元素。
Caused by: org.xml.sax.SAXParseException: The content of element type "list" must match "(meta*,subselect?,cache?,synchronize*,comment?,key,(index|list-index),(element|one-to-many|many-to-many|composite-element|many-to-any),loader?,sql-insert?,sql-update?,sql-delete?,sql-delete-all?,filter*)". at org.apache.xerces.util.ErrorHandlerWrapper.createSAXParseException(Unknown Source) at org.apache.xerces.util.ErrorHandlerWrapper.error(Unknown Source) at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown Source) at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown Source) at org.apache.xerces.impl.dtd.XMLDTDValidator.handleEndElement(Unknown Source) at org.apache.xerces.impl.dtd.XMLDTDValidator.endElement(Unknown Source) at org.apache.xerces.impl.XMLNSDocumentScannerImpl.scanEndElement(Unknown Source) at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown Source) at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source) at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source) at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source) at org.apache.xerces.parsers.XMLParser.parse(Unknown Source) at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source) at org.dom4j.io.SAXReader.read(SAXReader.java:465) at org.hibernate.cfg.Configuratio
最佳答案
您需要添加 <list-index
对于 <List >
是强制性的映射。
<list name="networks" cascade="all">
<key column="parent_id"/>
<list-index column="order" base="0" />
<one-to-many class="Network"/>
</list>
hibernate 引用文档
6.2.3. Indexed collections
All collection mappings, except those with set and bag semantics, need an index column in the collection table. An index column is a column that maps to an array index, or List index, or Map key.
关于xml - hibernate 一对多列表映射错误,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/7033159/