Hibernate 3.6.9 遇到令人沮丧的问题。 MS SQL Server 2008。注意异常和奇数列索引引用。

HQL 查询本身:

Select r from DataStoreReference r join fetch r.container c where r.hash=:hash and r.state=0

堆栈跟踪:

2012-05-16 00:01:22,184 [BackgroundDeletionThread] ERROR org.hibernate.util.JDBCExceptionReporter - The value supplied cannot be converted to BIGINT.  
2012-05-16 00:01:22,186 [BackgroundDeletionThread] ERROR org.hibernate.util.JDBCExceptionReporter - The value supplied cannot be converted to BIGINT.  
2012-05-16 00:01:22,188 [BackgroundDeletionThread] ERROR org.hibernate.util.JDBCExceptionReporter - Invalid column index 14.  
2012-05-16 00:01:22,190 [BackgroundDeletionThread] ERROR org.hibernate.util.JDBCExceptionReporter - The value supplied cannot be converted to BIGINT.  
2012-05-16 00:01:22,193 [BackgroundDeletionThread] ERROR org.hibernate.util.JDBCExceptionReporter - The value supplied cannot be converted to BIGINT.  
2012-05-16 00:01:22,194 [BackgroundDeletionThread] ERROR org.hibernate.util.JDBCExceptionReporter - Invalid column index 14.  
2012-05-16 00:01:22,194 [BackgroundDeletionThread] ERROR com.flipper.utils.ServerErrorHandlerStrategy - reportError: Db :: com.flipper.datastore.workers.BackgroundDeletionThread.executeWork:87 :: EXCEPTION : com.flipper.datastore.exceptions.DBStoreException: Null value was assigned to a property of primitive type setter of com.flipper.datastore.model.DataStoreReference.usage com.flipper.datastore.exceptions.DBStoreException: Null value was assigned to a property of primitive type setter of com.flipper.datastore.model.DataStoreReference.usage  
    at com.flipper.datastore.impl.hib.HibernateDBStore.getAllReferences(HibernateDBStore.java:301)
    at    com.flipper.datastore.workers.BackgroundDeletionThread.processEntry(BackgroundDeletionThread.java:165)
    at com.flipper.datastore.workers.BackgroundDeletionThread.processSet(BackgroundDeletionThread.java:138)
    at com.flipper.datastore.workers.BackgroundDeletionThread.executeWork(BackgroundDeletionThread.java:84)
    at com.flipper.datastore.workers.BackgroundDeletionThread.run(BackgroundDeletionThread.java:60)
Caused by: org.hibernate.PropertyAccessException: Null value was assigned to a property of primitive type setter of com.flipper.datastore.model.DataStoreReference.usage
    at org.hibernate.property.BasicPropertyAccessor$BasicSetter.set(BasicPropertyAccessor.java:109)
    at org.hibernate.tuple.entity.AbstractEntityTuplizer.setPropertyValues(AbstractEntityTuplizer.java:583)
    at org.hibernate.tuple.entity.PojoEntityTuplizer.setPropertyValues(PojoEntityTuplizer.java:229)
    at org.hibernate.persister.entity.AbstractEntityPersister.setPropertyValues(AbstractEntityPersister.java:3847)
    at org.hibernate.engine.TwoPhaseLoad.initializeEntity(TwoPhaseLoad.java:152)
    at org.hibernate.loader.Loader.initializeEntitiesAndCollections(Loader.java:982)
    at org.hibernate.loader.Loader.doQuery(Loader.java:857)
    at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:274)
    at org.hibernate.loader.Loader.doList(Loader.java:2542)
    at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2276)
    at org.hibernate.loader.Loader.list(Loader.java:2271)
    at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:459)
    at org.hibernate.hql.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:365)
    at org.hibernate.engine.query.HQLQueryPlan.performList(HQLQueryPlan.java:196)
    at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1268)
    at org.hibernate.impl.QueryImpl.list(QueryImpl.java:102)
    at com.flipper.message.dao.DataStoreDao.getAllReferencesByHash(DataStoreDao.java:136)
    at com.flipper.datastore.impl.hib.HibernateDBStore.getAllReferences(HibernateDBStore.java:298)
    ... 4 more
Caused by: java.lang.IllegalArgumentException
    at sun.reflect.GeneratedMethodAccessor556.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.hibernate.property.BasicPropertyAccessor$BasicSetter.set(BasicPropertyAccessor.java:66)
    ... 21 more

现在，如果以下内容不正确，我会从逻辑(和谷歌搜索)中理解这一点

a) DataStoreReference 的每个实例化后不久都会有 System.currentTimeMillis 的 setUsage) b) 该项目在映射中被标记为非空(见下文) c) 导出的表仅在 f_external 列中显示空值。 usage 列的长数字非常合理。

POJO:

数据存储引用

private long id;


private String hash;    
private long date;  
private long sze;   
private long usage; 

private int state;  
private String external;
private DataStoreContainer container; 

后跟通用的未修改的 getter/setter。

映射文件:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="com.flippr.datastore.model">
  <class name="DataStoreReference" table="t_dsref">
    <id name="id">
      <column name="ds_reference_id"/>
      <generator class="native"/>
    </id>
    <property name="hash" not-null="true" column="f_hash" lazy="false" index="idx_hash_dsr" type="string" length="128" />
    <property name="state" not-null="true" column="f_state" lazy="false" index="idx_hash_dsr,idx_size_dsr,idx_usage_dsr" type="integer"/>
    <!--  hibernate hates the name size -->
    <property name="sze" not-null="true" column="f_size" lazy="false" index="idx_size_dsr" type="long"/>
    <property name="date" not-null="true" column="f_date" lazy="false" type="long"/>    
    <property name="usage" not-null="true" column="f_usage" lazy="false" index="idx_usage_dsr" type="long"/>
    <property name="external" not-null="false" column="f_ext" lazy="false" type="string" length="160" />

    <many-to-one name="container" class="com.flipper.datastore.model.DataStoreContainer" 
     column="entity_id" foreign-key="fk_ds_container_id_dsr"  not-found="ignore" not-null="true"/>
   </class>
</hibernate-mapping>

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="com.flipper.datastore.model">
  <class name="DataStoreContainer" table="t_dscnt">
    <id name="id">
      <column name="ds_container_id"/>
      <generator class="native"/>
    </id>
    <property name="containerType" column="f_type" index="idx_containerType_dsc" lazy="false" type="integer"/>
    <property name="fileCount" column="f_fc" lazy="false" type="long"/>
    <property name="deletedCount" column="f_dc" lazy="false" type="long"/>
    <property name="path" column="f_path" length="255" lazy="false"  type="string"/>
    <set cascade="save-update,delete,delete-orphan,all-delete-orphan" inverse="true" name="documents">
      <key column="entity_id" />
      <one-to-many class="com.flipper.datastore.model.DataStoreReference"/>
    </set>
  </class>
</hibernate-mapping>

最佳答案

错误信息很清楚:在至少一行中，列 f_usage 有一个空值。这个 null 值不能放入像 long 这样的原始类型，因为原始类型不能表示 null。

当数据库中已经存在空值时，property 子句中的 not-null 属性不起作用。 not-null 属性仅用于 dmd 生成。但是你的数据库表 t_dsref 的 f_usage 列可能允许空值(检查 sql 中的 desc t_dsref)。

解决方案:用Long交换long:

private Long usage; 

并且在使用该值时，您必须处理 null 条件，例如

if (usage != null) {
  return usage.longValue();
else
  return -1;

(您正在使用 getter 和 setter 来访问 hibernate，所以这个小代码不应该在 getter 中，因为在数据库中，空值在更新后应该继续为 null，但是您可以在第二个 getter 中执行此操作你在其他地方使用它，或者你为 hibernate 做现场访问。)

我的一般建议:如果列在数据库中标记为 NOT NULL，则原始数据类型应该只用于 hibernate 属性。在数据库中。

关于java - hibernate 异常 Null 值被分配给原始类型 setter 的属性，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/10646358/