原因：org.springframework.data.mapping.PropertyReferenceException：没有属性findAll找到类型为User-Redis的所有属性

时间：2018-11-05 09:40:31

标签： java spring-boot redis jedis spring-data-redis

我是Redis的新手，并使用Spring Boot + Spring Data Redis示例。在此示例中，我使用了QueryByExampleRedisExecutor<T>上存储库方法，并使用了Example API进行了自定义查询。

以下是Redis NoSQL DB中存在的密钥。

redis 127.0.0.1:6379> KEYS *
 1) "country:76c78bcc-bb2a-41b3-a1fc-3dbb3042edd6:idx"
 2) "country:76c78bcc-bb2a-41b3-a1fc-3dbb3042edd6"
 3) "user:lastName:Kerr"
 4) "user"
 5) "user:role.roleName:API"
 6) "country:countryName:India"
 7) "Student:name:John Doe"
 8) "user:8252a4b3-22a1-4e6c-99fc-04fed93a21a5:idx"
 9) "user:8252a4b3-22a1-4e6c-99fc-04fed93a21a5"
10) "user:middleName:Lima"
11) "Student"
12) "user:middleName:Mike"
13) "user:firstName:John"
14) "country:countryCode:+91"
15) "user:role.roleName:ADMIN"
16) "user:lastName:Wixson"
17) "Student:1:idx"
18) "user:46ca0606-38a5-4d0c-8cea-38e2c4fa5bfa:idx"
19) "Student:2:idx"
20) "Student:1"
21) "user:firstName:Matt"
22) "user:46ca0606-38a5-4d0c-8cea-38e2c4fa5bfa"
23) "Student:2"
24) "country"
25) "Student:name:Michael Harford"
26) "country:84fc82f2-1c21-4d3e-9429-f1ee1039ceed:idx"
27) "country:84fc82f2-1c21-4d3e-9429-f1ee1039ceed"
redis 127.0.0.1:6379>

存储库方法-

Example<User> example = Example.of(User.builder().firstName("Mike").build());
long count = userRepository.count();
System.out.println(count);

当我执行下面的方法时，我只希望得到一个结果，但是我得到了两个计数。为什么？

此处显示更多信息：Consider revisiting the entries above or defining a bean of type 'org.springframework.data.redis.core.RedisTemplate' in your configuration

我们如何在日志中看到Redis snippet？我需要设置什么配置？

public interface UserRepository extends CrudRepository<User, String>, QueryByExampleExecutor<User>{
    List<User> findByFirstName(String firstName);

    List<User> findByFirstNameAndLastName(String firstName, String lastName);

    @Query("SELECT u FROM User u WHERE u.middleName LIKE :middleName ")
    List<User> findCustomByMiddleName(@Param("middleName") String middleName); 

    List<User> findByRole_RoleName(String roleName);
}

下面的错误可供参考-

java.lang.IllegalStateException: Failed to execute CommandLineRunner
    at org.springframework.boot.SpringApplication.callRunner(SpringApplication.java:795)
    at org.springframework.boot.SpringApplication.callRunners(SpringApplication.java:776)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:315)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1242)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1230)
    at com.baeldung.MainAppDemo.main(MainAppDemo.java:31)
Caused by: org.springframework.data.mapping.PropertyReferenceException: No property findAll found for type User!
    at org.springframework.data.mapping.PropertyPath.<init>(PropertyPath.java:94)
    at org.springframework.data.mapping.PropertyPath.create(PropertyPath.java:358)
    at org.springframework.data.mapping.PropertyPath.create(PropertyPath.java:334)
    at org.springframework.data.mapping.PropertyPath.lambda$from$0(PropertyPath.java:287)
    at java.util.concurrent.ConcurrentMap.computeIfAbsent(Unknown Source)
    at org.springframework.data.mapping.PropertyPath.from(PropertyPath.java:269)
    at org.springframework.data.mapping.PropertyPath.from(PropertyPath.java:252)
    at org.springframework.data.repository.query.parser.Part.<init>(Part.java:81)
    at org.springframework.data.repository.query.parser.PartTree$OrPart.lambda$new$0(PartTree.java:250)
    at java.util.stream.ReferencePipeline$3$1.accept(Unknown Source)
    at java.util.stream.ReferencePipeline$2$1.accept(Unknown Source)
    at java.util.Spliterators$ArraySpliterator.forEachRemaining(Unknown Source)
    at java.util.stream.AbstractPipeline.copyInto(Unknown Source)
    at java.util.stream.AbstractPipeline.wrapAndCopyInto(Unknown Source)
    at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(Unknown Source)
    at java.util.stream.AbstractPipeline.evaluate(Unknown Source)
    at java.util.stream.ReferencePipeline.collect(Unknown Source)
    at org.springframework.data.repository.query.parser.PartTree$OrPart.<init>(PartTree.java:251)
    at org.springframework.data.repository.query.parser.PartTree$Predicate.lambda$new$0(PartTree.java:380)
    at java.util.stream.ReferencePipeline$3$1.accept(Unknown Source)
    at java.util.stream.ReferencePipeline$2$1.accept(Unknown Source)
    at java.util.Spliterators$ArraySpliterator.forEachRemaining(Unknown Source)
    at java.util.stream.AbstractPipeline.copyInto(Unknown Source)
    at java.util.stream.AbstractPipeline.wrapAndCopyInto(Unknown Source)
    at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(Unknown Source)
    at java.util.stream.AbstractPipeline.evaluate(Unknown Source)
    at java.util.stream.ReferencePipeline.collect(Unknown Source)
    at org.springframework.data.repository.query.parser.PartTree$Predicate.<init>(PartTree.java:381)
    at org.springframework.data.repository.query.parser.PartTree.<init>(PartTree.java:93)
    at org.springframework.data.keyvalue.repository.query.KeyValuePartTreeQuery.createQuery(KeyValuePartTreeQuery.java:206)
    at org.springframework.data.keyvalue.repository.query.KeyValuePartTreeQuery.prepareQuery(KeyValuePartTreeQuery.java:148)
    at org.springframework.data.keyvalue.repository.query.KeyValuePartTreeQuery.execute(KeyValuePartTreeQuery.java:106)
    at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.doInvoke(RepositoryFactorySupport.java:602)
    at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.invoke(RepositoryFactorySupport.java:590)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:185)
    at org.springframework.data.projection.DefaultMethodInvokingMethodInterceptor.invoke(DefaultMethodInvokingMethodInterceptor.java:59)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:185)
    at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:185)
    at org.springframework.data.repository.core.support.SurroundingTransactionDetectorMethodInterceptor.invoke(SurroundingTransactionDetectorMethodInterceptor.java:61)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:185)
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:212)
    at com.sun.proxy.$Proxy69.findAll(Unknown Source)
    at com.baeldung.MainAppDemo.run(MainAppDemo.java:47)
    at org.springframework.boot.SpringApplication.callRunner(SpringApplication.java:792)
    ... 5 common frames omitted

2 个答案:

答案 0 :(得分：0)

您正在构造Example，但随后通过不使用它将其丢弃。您正在呼叫userRepository.count();，它基本上计算所有记录。您应该使用需要count的{​​{1}}。

此方法位于Example界面也应扩展的QueryByExampleExecutor上。然后，您可以简单地做。 

UserRepository

您应该得到预期的结果。

答案 1 :(得分：0)

我遇到了类似的问题。解决方案是将spring-data-redis和spring-data-common软件包升级到相同版本。 如果您使用的是maven：

        <dependency>
            <groupId>org.springframework.data</groupId>
            <artifactId>spring-data-redis</artifactId>
            <version>2.1.4.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.data</groupId>
            <artifactId>spring-data-commons</artifactId>
            <version>2.1.4.RELEASE</version>
        </dependency>
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