Question

MongoRepository是否有$和运算符？当我尝试和下面的操作员时，我收到了错误。我检查了document，但没有注意到“和”关键字。

public interface AssetRepository extends MongoRepository<Asset, String>{

    @Query("select a from Asset a where ownerId = ? and timeUpdated > ?")
    public List<Asset> findByOwnerIdAndGreaterThan(final String ownerId, Date timeUpdated);
}

错误

Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'assetRepository': Invocation of init method failed; nested exception is org.springframework.data.mapping.PropertyReferenceException: No property greaterThan found for type Asset!
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1574)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:539)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:476)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:303)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:299)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates(DefaultListableBeanFactory.java:1120)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1044)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:942)
    at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:813)
    at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:741)
    ... 29 more
Caused by: org.springframework.data.mapping.PropertyReferenceException: No property greaterThan found for type Asset!
    at org.springframework.data.mapping.PropertyPath.<init>(PropertyPath.java:75)
    at org.springframework.data.mapping.PropertyPath.create(PropertyPath.java:327)
    at org.springframework.data.mapping.PropertyPath.create(PropertyPath.java:307)
    at org.springframework.data.mapping.PropertyPath.from(PropertyPath.java:270)
    at org.springframework.data.mapping.PropertyPath.from(PropertyPath.java:241)
    at org.springframework.data.repository.query.parser.Part.<init>(Part.java:76)
    at org.springframework.data.repository.query.parser.PartTree$OrPart.<init>(PartTree.java:235)
    at org.springframework.data.repository.query.parser.PartTree$Predicate.buildTree(PartTree.java:373)
    at org.springframework.data.repository.query.parser.PartTree$Predicate.<init>(PartTree.java:353)
    at org.springframework.data.repository.query.parser.PartTree.<init>(PartTree.java:87)
    at org.springframework.data.mongodb.repository.query.PartTreeMongoQuery.<init>(PartTreeMongoQuery.java:53)
    at org.springframework.data.mongodb.repository.support.MongoRepositoryFactory$MongoQueryLookupStrategy.resolveQuery(MongoRepositoryFactory.java:128)
    at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.<init>(RepositoryFactorySupport.java:369)
    at org.springframework.data.repository.core.support.RepositoryFactorySupport.getRepository(RepositoryFactorySupport.java:192)
    at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.initAndReturn(RepositoryFactoryBeanSupport.java:239)
    at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.afterPropertiesSet(RepositoryFactoryBeanSupport.java:225)
    at org.springframework.data.mongodb.repository.support.MongoRepositoryFactoryBean.afterPropertiesSet(MongoRepositoryFactoryBean.java:108)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1633)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1570)

Answer 1

从您的例外情况来看，您的查询查询策略为CREATE，或者您没有从正确的命名空间（包）导入@Query。

您应该将方法名称更改为findByOwnerIdAndTimeUpdatedGreaterThan，假设Asset类具有timeUpdated属性。

或者，回到默认查找策略，以下应该可以工作（我认为）：

@Query("{ 'ownerId' : ?0 , 'timeUpdated' : {$gt : ?1}}")

请注意，您目前在@Query中使用JPA语法，而不是MongoDB。

Answer 2

代码不起作用有两个原因：

您正在使用不受支持的MongoDB的JPQL。如果要手动定义查询，请使用MongoDB查询（即JSON）。
该异常表示查询是从方法名称派生的。 findByOwnerIdAndGreaterThan没有多大意义，因为您需要定义要应用GreaterThan的属性。因此，根据您列为JPQL文档的内容，它可能需要与findByOwnerIdAndTimeUpdatedGreaterThan一致。

org.springframework.data.mapping.PropertyReferenceException：找不到类型的属性greaterThan

错误

2 个答案: