"No property exists found for type"... 使用带有 MongoDB 和 Spring-Data 的 QueryDslPredicateExecutor 时
"No property exists found for type"... When using the QueryDslPredicateExecutor with MongoDB and Spring-Data
我正在尝试将 QueryDslPredicateExecutor 与 MongoDB 和 Spring-Data 一起使用，但它似乎在 "exists()" 属性.
我正在使用 -
org.springframework.boot:spring-boot-starter-parent:1.3.5.RELEASE
com.querydsl:querydsl-mongodb:4.1.2
com.querydsl:querydsl-apt:4.1.2
org.mongodb.morphia:morphia:1.1.1
堆栈跟踪
Caused by: org.springframework.data.mapping.PropertyReferenceException: No property exists found for type Tree!
at org.springframework.data.mapping.PropertyPath.<init>(PropertyPath.java:77) ~[spring-data-commons-1.12.0.RELEASE.jar:na]
at org.springframework.data.mapping.PropertyPath.create(PropertyPath.java:329) ~[spring-data-commons-1.12.0.RELEASE.jar:na]
at org.springframework.data.mapping.PropertyPath.create(PropertyPath.java:309) ~[spring-data-commons-1.12.0.RELEASE.jar:na]
at org.springframework.data.mapping.PropertyPath.from(PropertyPath.java:272) ~[spring-data-commons-1.12.0.RELEASE.jar:na]
at org.springframework.data.mapping.PropertyPath.from(PropertyPath.java:243) ~[spring-data-commons-1.12.0.RELEASE.jar:na]
at org.springframework.data.repository.query.parser.Part.<init>(Part.java:76) ~[spring-data-commons-1.12.0.RELEASE.jar:na]
at org.springframework.data.repository.query.parser.PartTree$OrPart.<init>(PartTree.java:235) ~[spring-data-commons-1.12.0.RELEASE.jar:na]
at org.springframework.data.repository.query.parser.PartTree$Predicate.buildTree(PartTree.java:373) ~[spring-data-commons-1.12.0.RELEASE.jar:na]
at org.springframework.data.repository.query.parser.PartTree$Predicate.<init>(PartTree.java:353) ~[spring-data-commons-1.12.0.RELEASE.jar:na]
at org.springframework.data.repository.query.parser.PartTree.<init>(PartTree.java:84) ~[spring-data-commons-1.12.0.RELEASE.jar:na]
at org.springframework.data.mongodb.repository.query.PartTreeMongoQuery.<init>(PartTreeMongoQuery.java:60) ~[spring-data-mongodb-1.9.0.RELEASE.jar:na]
at org.springframework.data.mongodb.repository.support.MongoRepositoryFactory$MongoQueryLookupStrategy.resolveQuery(MongoRepositoryFactory.java:168) ~[spring-data-mongodb-1.9.0.RELEASE.jar:na]
at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.<init>(RepositoryFactorySupport.java:435) ~[spring-data-commons-1.12.0.RELEASE.jar:na]
at org.springframework.data.repository.core.support.RepositoryFactorySupport.getRepository(RepositoryFactorySupport.java:220) ~[spring-data-commons-1.12.0.RELEASE.jar:na]
at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.initAndReturn(RepositoryFactoryBeanSupport.java:266) ~[spring-data-commons-1.12.0.RELEASE.jar:na]
at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.afterPropertiesSet(RepositoryFactoryBeanSupport.java:252) ~[spring-data-commons-1.12.0.RELEASE.jar:na]
at org.springframework.data.mongodb.repository.support.MongoRepositoryFactoryBean.afterPropertiesSet(MongoRepositoryFactoryBean.java:108) ~[spring-data-mongodb-1.9.0.RELEASE.jar:na]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1637) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1574) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
... 30 common frames omitted
此 class
抛出异常
package org.springframework.data.mapping
// PropertyPath.class
....
/**
* Creates a leaf {@link PropertyPath} (no nested ones with the given name and owning type.
*
* @param name must not be {@literal null} or empty.
* @param owningType must not be {@literal null}.
* @param base the {@link PropertyPath} previously found.
*/
PropertyPath(String name, TypeInformation<?> owningType, List<PropertyPath> base) {
Assert.hasText(name, "Name must not be null or empty!");
Assert.notNull(owningType, "Owning type must not be null!");
Assert.notNull(base, "Perviously found properties must not be null!");
String propertyName = name.matches(ALL_UPPERCASE) ? name : StringUtils.uncapitalize(name);
TypeInformation<?> propertyType = owningType.getProperty(propertyName);
if (propertyType == null) {
throw new PropertyReferenceException(propertyName, owningType, base);
}
this.owningType = owningType;
this.isCollection = propertyType.isCollectionLike();
this.type = propertyType.getActualType();
this.name = propertyName;
}
属性（方法）来自我的存储库扩展的 QueryDslPredicateExecutor class。
public abstract boolean org.springframework.data.querydsl.QueryDslPredicateExecutor.exists(com.querydsl.core.types.Predicate)
这是存储库 -
public interface TreeRepository extends ExtendedMongoRepository<Tree, String>, QueryDslPredicateExecutor<Tree>{}
我最终通过让我的基础存储库扩展并实现 QueryDslPredicateExecutor 而不是更高级别的存储库来解决这个问题。
// Custom repository interface
@NoRepositoryBean
public interface ExtendedMongoRepository<T, ID extends Serializable> extends MongoRepository<T, ID>, QueryDslPredicateExecutor<T>{
public Page<T> query(Query query, Pageable pageable);
}
// Custom Repository Implementation
public abstract class ExtendedMongoRepositoryImpl<T, ID extends Serializable> extends QueryDslMongoRepository<T, ID>
implements ExtendedMongoRepository<T, ID> {
private Class<T> clazz;
private MongoOperations mongoOperations;
@SuppressWarnings("unused")
private MongoEntityInformation<T, ID> metadata;
public ExtendedMongoRepositoryImpl(MongoEntityInformation<T, ID> metadata, MongoOperations mongoOperations) {
super(metadata, mongoOperations);
this.mongoOperations = mongoOperations;
this.clazz = metadata.getJavaType();
this.metadata = metadata;
}
@Override
public Page<T> query(Query query, Pageable pageable) {
List<T> list = mongoOperations.find(query.with(pageable), clazz);
return new PageImpl<T>(list, pageable, list.size());
}
}
// Entity Repository Interface
public interface TreeRepository extends ExtendedMongoRepository<Tree, String> {}
改变
extends SimpleJpaRepository
对于
extends QueryDslJpaRepository
在我的基本 JPA 存储库中实现了它。
@laffuste 帮助我理解了这个问题。如果您正在声明 baseRepositoryClass（或扩展它），它与 Querydsl 不兼容。您需要将其更改为 Querydsl 基础 class，或对其进行扩展，两者都兼容。
public class SimpleSpecRepository<T, ID extends Serializable> extends QuerydslJpaRepository<T, ID>;
@EnableJpaRepositories(value = "com.foo.repository", repositoryBaseClass = SimpleSpecRepository.class)
@SpringBootApplication
public class ServiceEntryPoint {}
注意：要求所有仓库接口的实体映射都有Q映射。如果你不想这样，你需要创建一个单独的 repositoryFactoryBeanClass:
public class SimpleSpecRepository<T, ID extends Serializable> extends SimpleJpaRepository<T, ID>;
@EnableJpaRepositories(value = "com.foo.repository", repositoryFactoryBeanClass = SimpleRepositoryFactoryBean.class)
@SpringBootApplication
public class ServiceEntryPoint {}
/**
* Extension of the {@link JpaRepositoryFactoryBean} interface.
*
* @param <T> the type of the repository
* @param <S> the type of the entity
* @param <ID> the type of the entity identifier
*/
public class SimpleRepositoryFactoryBean<T extends JpaRepository<S, ID>, S, ID extends Serializable>
extends JpaRepositoryFactoryBean<T, S, ID> {
/**
* Creates a new {@link SimpleRepositoryFactoryBean} for the given repository
* interface.
*
* @param repositoryInterface must not be {@literal null}.
*/
public SimpleRepositoryFactoryBean(Class<? extends T> repositoryInterface) {
super(repositoryInterface);
}
@Override
protected RepositoryFactorySupport createRepositoryFactory(EntityManager entityManager) {
return new SimpleJpaRepositoryFactory<S, ID>(entityManager);
}
/**
* Extends the JPA specific generic repository factory.
*
* @param <S> the type of the entity
* @param <ID> the type of the entity identifier
*/
private static class SimpleJpaRepositoryFactory<S, ID extends Serializable> extends JpaRepositoryFactory {
/**
* Creates a new {@link SimpleJpaRepositoryFactory}.
*
* @param entityManager must not be {@literal null}
*/
public SimpleJpaRepositoryFactory(EntityManager entityManager) {
super(entityManager);
}
@Override
protected Class<?> getRepositoryBaseClass(RepositoryMetadata metadata) {
if (isQueryDslExecutor(metadata.getRepositoryInterface())) {
return QuerydslJpaRepository.class;
} else {
return SimpleSpecRepository.class;
}
}
/**
* Returns whether the given repository interface requires a QueryDsl specific
* implementation to be chosen.
*
* @param repositoryInterface
* @return
*/
private boolean isQueryDslExecutor(Class<?> repositoryInterface) {
return QUERY_DSL_PRESENT && QuerydslPredicateExecutor.class.isAssignableFrom(repositoryInterface);
}
}
}
注意：这仅适用于复杂配置。如果你有一个简单的配置，你应该能够做到以下几点：
@EnableJpaRepositories("com.foo.repository")
默认配置应自动支持 Querydsl 或 SimpleJPA。
我正在尝试将 QueryDslPredicateExecutor 与 MongoDB 和 Spring-Data 一起使用，但它似乎在 "exists()" 属性.
我正在使用 -
org.springframework.boot:spring-boot-starter-parent:1.3.5.RELEASE
com.querydsl:querydsl-mongodb:4.1.2
com.querydsl:querydsl-apt:4.1.2
org.mongodb.morphia:morphia:1.1.1
堆栈跟踪
Caused by: org.springframework.data.mapping.PropertyReferenceException: No property exists found for type Tree!
at org.springframework.data.mapping.PropertyPath.<init>(PropertyPath.java:77) ~[spring-data-commons-1.12.0.RELEASE.jar:na]
at org.springframework.data.mapping.PropertyPath.create(PropertyPath.java:329) ~[spring-data-commons-1.12.0.RELEASE.jar:na]
at org.springframework.data.mapping.PropertyPath.create(PropertyPath.java:309) ~[spring-data-commons-1.12.0.RELEASE.jar:na]
at org.springframework.data.mapping.PropertyPath.from(PropertyPath.java:272) ~[spring-data-commons-1.12.0.RELEASE.jar:na]
at org.springframework.data.mapping.PropertyPath.from(PropertyPath.java:243) ~[spring-data-commons-1.12.0.RELEASE.jar:na]
at org.springframework.data.repository.query.parser.Part.<init>(Part.java:76) ~[spring-data-commons-1.12.0.RELEASE.jar:na]
at org.springframework.data.repository.query.parser.PartTree$OrPart.<init>(PartTree.java:235) ~[spring-data-commons-1.12.0.RELEASE.jar:na]
at org.springframework.data.repository.query.parser.PartTree$Predicate.buildTree(PartTree.java:373) ~[spring-data-commons-1.12.0.RELEASE.jar:na]
at org.springframework.data.repository.query.parser.PartTree$Predicate.<init>(PartTree.java:353) ~[spring-data-commons-1.12.0.RELEASE.jar:na]
at org.springframework.data.repository.query.parser.PartTree.<init>(PartTree.java:84) ~[spring-data-commons-1.12.0.RELEASE.jar:na]
at org.springframework.data.mongodb.repository.query.PartTreeMongoQuery.<init>(PartTreeMongoQuery.java:60) ~[spring-data-mongodb-1.9.0.RELEASE.jar:na]
at org.springframework.data.mongodb.repository.support.MongoRepositoryFactory$MongoQueryLookupStrategy.resolveQuery(MongoRepositoryFactory.java:168) ~[spring-data-mongodb-1.9.0.RELEASE.jar:na]
at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.<init>(RepositoryFactorySupport.java:435) ~[spring-data-commons-1.12.0.RELEASE.jar:na]
at org.springframework.data.repository.core.support.RepositoryFactorySupport.getRepository(RepositoryFactorySupport.java:220) ~[spring-data-commons-1.12.0.RELEASE.jar:na]
at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.initAndReturn(RepositoryFactoryBeanSupport.java:266) ~[spring-data-commons-1.12.0.RELEASE.jar:na]
at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.afterPropertiesSet(RepositoryFactoryBeanSupport.java:252) ~[spring-data-commons-1.12.0.RELEASE.jar:na]
at org.springframework.data.mongodb.repository.support.MongoRepositoryFactoryBean.afterPropertiesSet(MongoRepositoryFactoryBean.java:108) ~[spring-data-mongodb-1.9.0.RELEASE.jar:na]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1637) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1574) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
... 30 common frames omitted
此 class
抛出异常package org.springframework.data.mapping
// PropertyPath.class
....
/**
* Creates a leaf {@link PropertyPath} (no nested ones with the given name and owning type.
*
* @param name must not be {@literal null} or empty.
* @param owningType must not be {@literal null}.
* @param base the {@link PropertyPath} previously found.
*/
PropertyPath(String name, TypeInformation<?> owningType, List<PropertyPath> base) {
Assert.hasText(name, "Name must not be null or empty!");
Assert.notNull(owningType, "Owning type must not be null!");
Assert.notNull(base, "Perviously found properties must not be null!");
String propertyName = name.matches(ALL_UPPERCASE) ? name : StringUtils.uncapitalize(name);
TypeInformation<?> propertyType = owningType.getProperty(propertyName);
if (propertyType == null) {
throw new PropertyReferenceException(propertyName, owningType, base);
}
this.owningType = owningType;
this.isCollection = propertyType.isCollectionLike();
this.type = propertyType.getActualType();
this.name = propertyName;
}
属性（方法）来自我的存储库扩展的 QueryDslPredicateExecutor class。
public abstract boolean org.springframework.data.querydsl.QueryDslPredicateExecutor.exists(com.querydsl.core.types.Predicate)
这是存储库 -
public interface TreeRepository extends ExtendedMongoRepository<Tree, String>, QueryDslPredicateExecutor<Tree>{}
我最终通过让我的基础存储库扩展并实现 QueryDslPredicateExecutor 而不是更高级别的存储库来解决这个问题。
// Custom repository interface
@NoRepositoryBean
public interface ExtendedMongoRepository<T, ID extends Serializable> extends MongoRepository<T, ID>, QueryDslPredicateExecutor<T>{
public Page<T> query(Query query, Pageable pageable);
}
// Custom Repository Implementation
public abstract class ExtendedMongoRepositoryImpl<T, ID extends Serializable> extends QueryDslMongoRepository<T, ID>
implements ExtendedMongoRepository<T, ID> {
private Class<T> clazz;
private MongoOperations mongoOperations;
@SuppressWarnings("unused")
private MongoEntityInformation<T, ID> metadata;
public ExtendedMongoRepositoryImpl(MongoEntityInformation<T, ID> metadata, MongoOperations mongoOperations) {
super(metadata, mongoOperations);
this.mongoOperations = mongoOperations;
this.clazz = metadata.getJavaType();
this.metadata = metadata;
}
@Override
public Page<T> query(Query query, Pageable pageable) {
List<T> list = mongoOperations.find(query.with(pageable), clazz);
return new PageImpl<T>(list, pageable, list.size());
}
}
// Entity Repository Interface
public interface TreeRepository extends ExtendedMongoRepository<Tree, String> {}
改变
extends SimpleJpaRepository
对于
extends QueryDslJpaRepository
在我的基本 JPA 存储库中实现了它。
@laffuste 帮助我理解了这个问题。如果您正在声明 baseRepositoryClass（或扩展它），它与 Querydsl 不兼容。您需要将其更改为 Querydsl 基础 class，或对其进行扩展，两者都兼容。
public class SimpleSpecRepository<T, ID extends Serializable> extends QuerydslJpaRepository<T, ID>;
@EnableJpaRepositories(value = "com.foo.repository", repositoryBaseClass = SimpleSpecRepository.class)
@SpringBootApplication
public class ServiceEntryPoint {}
注意：要求所有仓库接口的实体映射都有Q映射。如果你不想这样，你需要创建一个单独的 repositoryFactoryBeanClass:
public class SimpleSpecRepository<T, ID extends Serializable> extends SimpleJpaRepository<T, ID>;
@EnableJpaRepositories(value = "com.foo.repository", repositoryFactoryBeanClass = SimpleRepositoryFactoryBean.class)
@SpringBootApplication
public class ServiceEntryPoint {}
/**
* Extension of the {@link JpaRepositoryFactoryBean} interface.
*
* @param <T> the type of the repository
* @param <S> the type of the entity
* @param <ID> the type of the entity identifier
*/
public class SimpleRepositoryFactoryBean<T extends JpaRepository<S, ID>, S, ID extends Serializable>
extends JpaRepositoryFactoryBean<T, S, ID> {
/**
* Creates a new {@link SimpleRepositoryFactoryBean} for the given repository
* interface.
*
* @param repositoryInterface must not be {@literal null}.
*/
public SimpleRepositoryFactoryBean(Class<? extends T> repositoryInterface) {
super(repositoryInterface);
}
@Override
protected RepositoryFactorySupport createRepositoryFactory(EntityManager entityManager) {
return new SimpleJpaRepositoryFactory<S, ID>(entityManager);
}
/**
* Extends the JPA specific generic repository factory.
*
* @param <S> the type of the entity
* @param <ID> the type of the entity identifier
*/
private static class SimpleJpaRepositoryFactory<S, ID extends Serializable> extends JpaRepositoryFactory {
/**
* Creates a new {@link SimpleJpaRepositoryFactory}.
*
* @param entityManager must not be {@literal null}
*/
public SimpleJpaRepositoryFactory(EntityManager entityManager) {
super(entityManager);
}
@Override
protected Class<?> getRepositoryBaseClass(RepositoryMetadata metadata) {
if (isQueryDslExecutor(metadata.getRepositoryInterface())) {
return QuerydslJpaRepository.class;
} else {
return SimpleSpecRepository.class;
}
}
/**
* Returns whether the given repository interface requires a QueryDsl specific
* implementation to be chosen.
*
* @param repositoryInterface
* @return
*/
private boolean isQueryDslExecutor(Class<?> repositoryInterface) {
return QUERY_DSL_PRESENT && QuerydslPredicateExecutor.class.isAssignableFrom(repositoryInterface);
}
}
}
注意：这仅适用于复杂配置。如果你有一个简单的配置，你应该能够做到以下几点：
@EnableJpaRepositories("com.foo.repository")
默认配置应自动支持 Querydsl 或 SimpleJPA。