Postgresql + Hibernate 5列未找到，但存在coluimn

Question

我正在將我的應用程序轉換爲與Postgresql和Hibernate 5（以前是Mysql和Hibernate 4）一起工作，但遇到了讓我感到莫名其妙的問題。

當我運行我的單元測試時，我得到有關缺少列的錯誤，但列存在。錯誤消息中的表名和列名與數據庫中的內容完全相同。

實體類的代碼片段：

@Entity 
@Table(name="bractiondata") 
public class BusinessRuleActionData { 

    @Id @GeneratedValue(strategy = GenerationType.IDENTITY) 
    private long id; 

    @ManyToOne(targetEntity=com.model.business.BusinessRule.class) 
    @Cascade({CascadeType.SAVE_UPDATE}) 
    @JoinColumn(name = "businessRule") 
    private BusinessRule businessRule; 

    @Enumerated(EnumType.STRING) 
    private RuleActionEnum actionType; 

    @OneToMany(mappedBy="action", targetEntity=com.model.business.action.BusinessRuleActionDataTuple.class) 
    @Cascade({CascadeType.ALL}) 
    @MapKey(name="fieldName") 
    private Map<String, BusinessRuleActionDataTuple> tuples = new HashMap<String, BusinessRuleActionDataTuple>(); 

...methods 

錯誤消息：

java.lang.IllegalStateException: Failed to load ApplicationContext 
    at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:124) 
    at org.springframework.test.context.support.DefaultTestContext.getApplicationContext(DefaultTestContext.java:83) 
    at org.springframework.test.context.support.DependencyInjectionTestExecutionListener.injectDependencies(DependencyInjectionTestExecutionListener.java:117) 
    at org.springframework.test.context.support.DependencyInjectionTestExecutionListener.prepareTestInstance(DependencyInjectionTestExecutionListener.java:83) 
    at org.springframework.test.context.TestContextManager.prepareTestInstance(TestContextManager.java:230) 
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.createTest(SpringJUnit4ClassRunner.java:228) 
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner$1.runReflectiveCall(SpringJUnit4ClassRunner.java:287) 
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) 
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.methodBlock(SpringJUnit4ClassRunner.java:289) 
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:247) 
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:94) 
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290) 
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71) 
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288) 
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58) 
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268) 
    at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61) 
    at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70) 
    at org.junit.runners.ParentRunner.run(ParentRunner.java:363) 
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:191) 
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86) 
    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38) 
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459) 
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675) 
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382) 
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192) 
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in file [E:\business\projecten\yobu\yobu-model\bin\testContext-model-hibernate.xml]: Invocation of init method failed; nested exception is javax.persistence.PersistenceException: [PersistenceUnit: default] Unable to build Hibernate SessionFactory 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1578) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:545) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482) 
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) 
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) 
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) 
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) 
    at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1076) 
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:851) 
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:541) 
    at org.springframework.test.context.support.AbstractGenericContextLoader.loadContext(AbstractGenericContextLoader.java:128) 
    at org.springframework.test.context.support.AbstractGenericContextLoader.loadContext(AbstractGenericContextLoader.java:60) 
    at org.springframework.test.context.support.AbstractDelegatingSmartContextLoader.delegateLoading(AbstractDelegatingSmartContextLoader.java:108) 
    at org.springframework.test.context.support.AbstractDelegatingSmartContextLoader.loadContext(AbstractDelegatingSmartContextLoader.java:251) 
    at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContextInternal(DefaultCacheAwareContextLoaderDelegate.java:98) 
    at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:116) 
    ... 25 more 
Caused by: javax.persistence.PersistenceException: [PersistenceUnit: default] Unable to build Hibernate SessionFactory 
    at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.persistenceException(EntityManagerFactoryBuilderImpl.java:954) 
    at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:884) 
    at org.springframework.orm.jpa.vendor.SpringHibernateJpaPersistenceProvider.createContainerEntityManagerFactory(SpringHibernateJpaPersistenceProvider.java:60) 
    at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:338) 
    at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.buildNativeEntityManagerFactory(AbstractEntityManagerFactoryBean.java:373) 
    at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:362) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1637) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1574) 
    ... 40 more 
Caused by: org.hibernate.tool.schema.spi.SchemaManagementException: Schema-validation: missing column [actionType] in table [bractiondata] 
    at org.hibernate.tool.schema.internal.SchemaValidatorImpl.validateTable(SchemaValidatorImpl.java:148) 
    at org.hibernate.tool.schema.internal.SchemaValidatorImpl.performValidation(SchemaValidatorImpl.java:100) 
    at org.hibernate.tool.schema.internal.SchemaValidatorImpl.doValidation(SchemaValidatorImpl.java:67) 
    at org.hibernate.tool.schema.spi.SchemaManagementToolCoordinator.performDatabaseAction(SchemaManagementToolCoordinator.java:184) 
    at org.hibernate.tool.schema.spi.SchemaManagementToolCoordinator.process(SchemaManagementToolCoordinator.java:64) 
    at org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:458) 
    at org.hibernate.boot.internal.SessionFactoryBuilderImpl.build(SessionFactoryBuilderImpl.java:465) 
    at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:881) 
    ... 46 more 

PostgreSQL的創建表的語句：

CREATE TABLE public.bractiondata 
(
    id bigint NOT NULL DEFAULT nextval('bractiondata_id_seq'::regclass), 
    "businessRule" bigint, 
    "actionType" character varying(100), 
    CONSTRAINT bractiondata_pkey PRIMARY KEY (id), 
    CONSTRAINT "bractiondata_businessRule_fkey" FOREIGN KEY ("businessRule") 
     REFERENCES public.businessrule (id) MATCH SIMPLE 
     ON UPDATE RESTRICT ON DELETE RESTRICT 
) 
WITH (
    OIDS=FALSE 
); 

該表存在，顯然可以發現。列動作類型也存在，但由於某種原因無法找到。雖然我懷疑是正確的，但它沒有什麼區別，我試圖添加一個@Column註釋不起作用。有沒有人知道在這種情況下導致這種錯誤的原因是什麼？

Answer 1

問題是混合大小寫的列名稱。任何從中選擇的SQL都必須在名稱周圍加引號，而且我不知道Hibernate，但我的猜測是代碼中的引號用於封裝字符串而不是實際引號。

這是從psql的會話複製：

create temporary table btest1 
(id bigint, 
"businessRule" bigint, 
"actionType" character varying(100) 
); 

select id, businessRule, actionType from btest1; 
ERROR: column "businessrule" does not exist 

select id, "businessRule", "actionType" from btest1; 
id | businessRule | actionType 
----+--------------+------------ 
(0 rows) 

您可以弄清楚如何讓雙引號字符轉換成由Hibernate生成的SQL，或者改變您的列名使用全部小寫。