spring-data-commons-2.0.0：找不到类型T的属性删除！ ReactiveCrudRepository

时间：2017-04-22 12:34:02

标签： spring-data spring-data-jpa spring-webflux

问题：通过扩展ReactiveCrudRepository尝试弹出Web以及弹簧数据。我收到以下错误：

Caused by: org.springframework.data.mapping.PropertyReferenceException: No property delete found for type Product!
        at org.springframework.data.mapping.PropertyPath.lambda$new$0(PropertyPath.java:82) ~[spring-data-commons-2.0.0.BUILD-SNAPSHOT.jar:na]
        at java.util.Optional.orElseThrow(Optional.java:290) ~[na:1.8.0_101]
        at org.springframework.data.mapping.PropertyPath.<init>(PropertyPath.java:82) ~[spring-data-commons-2.0.0.BUILD-SNAPSHOT.jar:na]
        at org.springframework.data.mapping.PropertyPath.create(PropertyPath.java:304) ~[spring-data-commons-2.0.0.BUILD-SNAPSHOT.jar:na]
        at org.springframework.data.mapping.PropertyPath.create(PropertyPath.java:284) ~[spring-data-commons-2.0.0.BUILD-SNAPSHOT.jar:na]
        at org.springframework.data.mapping.PropertyPath.from(PropertyPath.java:243) ~[spring-data-commons-2.0.0.BUILD-SNAPSHOT.jar:na]
        at org.springframework.data.mapping.PropertyPath.from(PropertyPath.java:211) ~[spring-data-commons-2.0.0.BUILD-SNAPSHOT.jar:na]
        at org.springframework.data.repository.query.parser.Part.<init>(Part.java:81) ~[spring-data-commons-2.0.0.BUILD-SNAPSHOT.jar:na]
        at org.springframework.data.repository.query.parser.PartTree$OrPart.lambda$new$0(PartTree.java:239) ~[spring-data-commons-2.0.0.BUILD-SNAPSHOT.jar:na]
        at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193) ~[na:1.8.0_101]
        at java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:175) ~[na:1.8.0_101]
        at java.util.Spliterators$ArraySpliterator.forEachRemaining(Spliterators.java:948) ~[na:1.8.0_101]
        at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:481) ~[na:1.8.0_101]
        at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:471) ~[na:1.8.0_101]
        at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:708) ~[na:1.8.0_101]
        at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[na:1.8.0_101]
        at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:499) ~[na:1.8.0_101]
        at org.springframework.data.repository.query.parser.PartTree$OrPart.<init>(PartTree.java:240) ~[spring-data-commons-2.0.0.BUILD-SNAPSHOT.jar:na]
        at org.springframework.data.repository.query.parser.PartTree$Predicate.lambda$new$0(PartTree.java:368) ~[spring-data-commons-2.0.0.BUILD-SNAPSHOT.jar:na]
        at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193) ~[na:1.8.0_101]
        at java.util.Spliterators$ArraySpliterator.forEachRemaining(Spliterators.java:948) ~[na:1.8.0_101]
        at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:481) ~[na:1.8.0_101]
        at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:471) ~[na:1.8.0_101]
        at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:708) ~[na:1.8.0_101]
        at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[na:1.8.0_101]
        at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:499) ~[na:1.8.0_101]
        at org.springframework.data.repository.query.parser.PartTree$Predicate.<init>(PartTree.java:369) ~[spring-data-commons-2.0.0.BUILD-SNAPSHOT.jar:na]
        at org.springframework.data.repository.query.parser.PartTree.<init>(PartTree.java:92) ~[spring-data-commons-2.0.0.BUILD-SNAPSHOT.jar:na]
        at org.springframework.data.jpa.repository.query.PartTreeJpaQuery.<init>(PartTreeJpaQuery.java:67) ~[spring-data-jpa-2.0.0.BUILD-SNAPSHOT.jar:na]
        at org.springframework.data.jpa.repository.query.JpaQueryLookupStrategy$CreateQueryLookupStrategy.resolveQuery(JpaQueryLookupStrategy.java:103) ~[spring-data-jpa-2.0.0.BUILD-SNAPSHOT.jar:na]
        at org.springframework.data.jpa.repository.query.JpaQueryLookupStrategy$CreateIfNotFoundQueryLookupStrategy.resolveQuery(JpaQueryLookupStrategy.java:214) ~[spring-data-jpa-2.0.0.BUILD-SNAPSHOT.jar:na]
        at org.springframework.data.jpa.repository.query.JpaQueryLookupStrategy$AbstractQueryLookupStrategy.resolveQuery(JpaQueryLookupStrategy.java:77) ~[spring-data-jpa-2.0.0.BUILD-SNAPSHOT.jar:na]
        at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.lambda$null$0(RepositoryFactorySupport.java:410) ~[spring-data-commons-2.0.0.BUILD-SNAPSHOT.jar:na]
        at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193) ~[na:1.8.0_101]
        at java.util.Iterator.forEachRemaining(Iterator.java:116) ~[na:1.8.0_101]
        at java.util.Collections$UnmodifiableCollection$1.forEachRemaining(Collections.java:1049) ~[na:1.8.0_101]
        at java.util.Spliterators$IteratorSpliterator.forEachRemaining(Spliterators.java:1801) ~[na:1.8.0_101]
        at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:481) ~[na:1.8.0_101]
        at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:471) ~[na:1.8.0_101]
        at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:708) ~[na:1.8.0_101]
        at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[na:1.8.0_101]
        at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:499) ~[na:1.8.0_101]
        at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.lambda$new$2(RepositoryFactorySupport.java:412) ~[spring-data-commons-2.0.0.BUILD-SNAPSHOT.jar:na]
        at java.util.Optional.map(Optional.java:215) ~[na:1.8.0_101]
        at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.<init>(RepositoryFactorySupport.java:403) ~[spring-data-commons-2.0.0.BUILD-SNAPSHOT.jar:na]

代码：

产品：

@Entity
@Table(name="PRODUCT")
public class Product implements Serializable {


    @Id
    @GeneratedValue
    @Column(name="PRODUCT_ID")
    private Long productId;

    @Column(name="PRODUCT_NAME")
    private String productName;



}

产品信息库：

public interface ProductRepository extends ReactiveCrudRepository<Product, Long>{
}

的pom.xml ：

<parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.0.BUILD-SNAPSHOT</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-webflux</artifactId>
        </dependency>

Github：Project Link

请在此处提出问题以及解决方法。

1 个答案:

答案 0 :(得分：6)

发生此错误是因为Spring Data JPA不支持ReactiveCrudRepository。

根据此Spring Data official blog bost (November 23, 2016)，目前仅支持MongoDB，Cassandra和Redis：

  

支持反应式数据访问

     

使其成为里程碑的最重要的补充是增加对所选商店的反应式数据访问的支持。这意味着： MongoDB，Cassandra和Redis 的响应式Spring Data存储库和模板。

根据Mark Paluch对jira.spring.io的评论，JPA将不予支持。

  

我们不会为Spring Data JPA提供反应性支持。暴露一个反应性API会产生被动反应的期望，但这与JPA完全相反。 JPA是阻塞的，需要一个绑定到线程的事务上下文，整个JDBC后端也遵循阻塞方法。在反应/异步数据库驱动程序的上下文中，为关系数据库提供反应式API仍然有意义。

以下是另一个相关的StackOverflow问题：ReactiveCrudRepository to use Hibernate in spring。

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