Error in sessionFactory bean creation

[castortroy]

I'm new to springframework and I'm trying to follow the sample program from "Spring: A Developer's Notebook".

I get an error in my spring configuration file that says it cannot find the "id" field to create the sessionFactory bean. I don't understand what this means.

Exception in thread "main" org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory' defined in class path resource [RentABike-context.xml]: Initialization of bean failed; nested exception is org.hibernate.PropertyNotFoundException: field not found: id
org.hibernate.PropertyNotFoundException: field not found: id
	at org.hibernate.property.DirectPropertyAccessor.getField(DirectPropertyAccessor.java:97)
	at org.hibernate.property.DirectPropertyAccessor.getField(DirectPropertyAccessor.java:104)
	at org.hibernate.property.DirectPropertyAccessor.getGetter(DirectPropertyAccessor.java:112)
	at org.hibernate.util.ReflectHelper.getter(ReflectHelper.java:89)
	at org.hibernate.util.ReflectHelper.reflectedPropertyClass(ReflectHelper.java:77)
	at org.hibernate.mapping.SimpleValue.setTypeUsingReflection(SimpleValue.java:276)
	at org.hibernate.cfg.HbmBinder.bindSimpleId(HbmBinder.java:403)
	at org.hibernate.cfg.HbmBinder.bindRootPersistentClassCommonValues(HbmBinder.java:336)
	at org.hibernate.cfg.HbmBinder.bindRootClass(HbmBinder.java:275)
	at org.hibernate.cfg.HbmBinder.bindRoot(HbmBinder.java:146)
	at org.hibernate.cfg.Configuration.add(Configuration.java:385)
	at org.hibernate.cfg.Configuration.addInputStream(Configuration.java:426)
	at org.springframework.orm.hibernate3.LocalSessionFactoryBean.afterPropertiesSet(LocalSessionFactoryBean.java:654)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1059)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:363)
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:226)
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:147)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:269)
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:320)
	at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:87)
	at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:72)
	at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:63)
	at spring.RentABikeAssembler.main(RentABikeAssembler.java:10)

The spring configuration file is as follows:

<beans>
	<bean id="dataSource"
		class="org.springframework.jdbc.datasource.DriverManagerDataSource">
		<property name="driverClassName">
			<value>org.hsqldb.jdbcDriver</value>
		</property>
		<property name="url">
			<value>jdbc:hsqldb:hsql://localhost</value>
		</property>
		<property name="username">
			<value>sa</value>
		</property>
	</bean>

	<bean id="rentaBike" class="spring.HibRentABike">
		<property name="storeName">
			<value>"Bruce's Bikes"</value>
		</property>
		<property name="sessionFactory">
			<ref local="sessionFactory" />
		</property>
	</bean>

	<bean id="sessionFactory"
		class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
		<property name="dataSource">
			<ref local="dataSource" />
		</property>
		<property name="mappingResources">
			<list>
				<value>spring/Bike.hbm.xml</value>
			</list>
		</property>
		<property name="hibernateProperties">
			<props>
				<prop key="hibernate.dialect">
					org.hibernate.dialect.HSQLDialect
				</prop>
			</props>
		</property>
	</bean>

	<bean id="commandLineView" class="spring.CommandLineView">
		<property name="rentaBike">
			<ref bean="rentaBike" />
		</property>
	</bean>

</beans>

Note that I only want to output the results to the console. I haven't integrated it yet with tomcat or other web UI. What do I need to change in the spring config file to fix this.

Thanks!

[Colin Yates]

Without looking too closely

This exception is (what|similiar to the one) you get if you have defined an property in the mapping file which doesn't exist on the object model.

I would check your mapping files (Bike.hbm.xml) and ensure that there actually is an "id" on the domain model.

[castortroy]

How embarassing!!!

I forgot to add an id member to my Bike class.
Thanks!

[Colin Yates]

Happens to us all; how do you think I recognised the exception