如何解决 micronaut 应用程序中的错误“没有 [io.micronaut.data.operations.PrimaryRepositoryOperations] 类型的 bean”？
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【中文标题】如何解决 micronaut 应用程序中的错误“没有 [io.micronaut.data.operations.PrimaryRepositoryOperations] 类型的 bean”？【英文标题】：How do I resolve error "No bean of type [io.micronaut.data.operations.PrimaryRepositoryOperations] exists" in micronaut application? 【发布时间】：2020-05-03 18:49:50 【问题描述】：我正在评估 micronaut 并尝试移植一个小型应用程序作为试点项目。我在处理数据源/存储库时遇到了麻烦。
我有以下application.yml：
micronaut:
application:
name: bling-application
datasources:
default:
url: jdbc:h2:mem:devDb;MVCC=TRUE;LOCK_TIMEOUT=10000;DB_CLOSE_ON_EXIT=FALSE
driverClassName: org.h2.Driver
username: sa
password: ''
schema-generate: CREATE_DROP
dialect: H2
jpa:
default:
entity-scan:
packages: 'my.package.entity'
properties:
hibernate:
bytecode:
provider: none
hbm2ddl:
auto: update
我定义了一个简单的Repository接口如下：
package my.package.entity.repository;
import my.package.entity.Company;
import io.micronaut.data.annotation.Repository;
import io.micronaut.data.repository.CrudRepository;
@Repository
public interface CompanyRepository extends CrudRepository<Company, Long>
Company findByName(String name);
当我在测试模式 (./mvnw compile exec:exec) 下运行应用程序时，它启动时没有错误。但是，当我请求一个行使 CompanyRepository 的端点时，我收到以下异常：
14:38:37.307 [pool-1-thread-4] ERROR i.m.h.s.netty.RoutingInBoundHandler - Unexpected error occurred: No backing RepositoryOperations configured for repository. Check your configuration and try again
io.micronaut.context.exceptions.ConfigurationException: No backing RepositoryOperations configured for repository. Check your configuration and try again
at io.micronaut.data.intercept.DataIntroductionAdvice.findInterceptor(DataIntroductionAdvice.java:109)
at io.micronaut.data.intercept.DataIntroductionAdvice.intercept(DataIntroductionAdvice.java:77)
at io.micronaut.aop.chain.MethodInterceptorChain.proceed(MethodInterceptorChain.java:69)
at my.package.entity.repository.CompanyRepository$Intercepted.findByName(Unknown Source)
at my.package.bling.BlingExportBean.getProductionCompanyByName(BlingExportBean.java:519)
at my.package.bling.BlingExportBean.doExport(BlingExportBean.java:167)
at my.package.bling.BlingExportBean.export(BlingExportBean.java:112)
at my.package.bling.BlingExportResource.export(BlingExportResource.java:20)
at my.package.bling.$BlingExportResourceDefinition$$exec1.invokeInternal(Unknown Source)
at io.micronaut.context.AbstractExecutableMethod.invoke(AbstractExecutableMethod.java:147)
at io.micronaut.context.DefaultBeanContext$BeanExecutionHandle.invoke(DefaultBeanContext.java:2844)
at io.micronaut.web.router.AbstractRouteMatch.execute(AbstractRouteMatch.java:235)
at io.micronaut.web.router.RouteMatch.execute(RouteMatch.java:122)
at io.micronaut.http.server.netty.RoutingInBoundHandler.lambda$buildResultEmitter$17(RoutingInBoundHandler.java:1400)
at io.reactivex.internal.operators.flowable.FlowableCreate.subscribeActual(FlowableCreate.java:71)
at io.reactivex.Flowable.subscribe(Flowable.java:14918)
at io.reactivex.Flowable.subscribe(Flowable.java:14865)
at io.micronaut.reactive.rxjava2.RxInstrumentedFlowable.subscribeActual(RxInstrumentedFlowable.java:68)
at io.reactivex.Flowable.subscribe(Flowable.java:14918)
at io.reactivex.internal.operators.flowable.FlowableMap.subscribeActual(FlowableMap.java:37)
at io.reactivex.Flowable.subscribe(Flowable.java:14918)
at io.reactivex.Flowable.subscribe(Flowable.java:14865)
at io.micronaut.reactive.rxjava2.RxInstrumentedFlowable.subscribeActual(RxInstrumentedFlowable.java:68)
at io.reactivex.Flowable.subscribe(Flowable.java:14918)
at io.reactivex.internal.operators.flowable.FlowableSwitchIfEmpty.subscribeActual(FlowableSwitchIfEmpty.java:32)
at io.reactivex.Flowable.subscribe(Flowable.java:14918)
at io.reactivex.Flowable.subscribe(Flowable.java:14865)
at io.micronaut.reactive.rxjava2.RxInstrumentedFlowable.subscribeActual(RxInstrumentedFlowable.java:68)
at io.reactivex.Flowable.subscribe(Flowable.java:14918)
at io.reactivex.Flowable.subscribe(Flowable.java:14868)
at io.micronaut.http.context.ServerRequestTracingPublisher.lambda$subscribe$0(ServerRequestTracingPublisher.java:52)
at io.micronaut.http.context.ServerRequestContext.with(ServerRequestContext.java:52)
at io.micronaut.http.context.ServerRequestTracingPublisher.subscribe(ServerRequestTracingPublisher.java:52)
at io.reactivex.internal.operators.flowable.FlowableFromPublisher.subscribeActual(FlowableFromPublisher.java:29)
at io.reactivex.Flowable.subscribe(Flowable.java:14918)
at io.reactivex.Flowable.subscribe(Flowable.java:14865)
at io.micronaut.reactive.rxjava2.RxInstrumentedFlowable.subscribeActual(RxInstrumentedFlowable.java:68)
at io.reactivex.Flowable.subscribe(Flowable.java:14918)
at io.reactivex.Flowable.subscribe(Flowable.java:14865)
at io.reactivex.internal.operators.flowable.FlowableSubscribeOn$SubscribeOnSubscriber.run(FlowableSubscribeOn.java:82)
at io.reactivex.internal.schedulers.ExecutorScheduler$ExecutorWorker$BooleanRunnable.run(ExecutorScheduler.java:288)
at io.reactivex.internal.schedulers.ExecutorScheduler$ExecutorWorker.run(ExecutorScheduler.java:253)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Caused by: io.micronaut.context.exceptions.NoSuchBeanException: No bean of type [io.micronaut.data.operations.PrimaryRepositoryOperations] exists. Make sure the bean is not disabled by bean requirements (enable trace logging for 'io.micronaut.context.condition' to check) and if the bean is enabled then ensure the class is declared a bean and annotation processing is enabled (for Java and Kotlin the 'micronaut-inject-java' dependency should be configured as an annotation processor).
at io.micronaut.context.DefaultBeanContext.getBeanInternal(DefaultBeanContext.java:1974)
at io.micronaut.context.DefaultBeanContext.getBean(DefaultBeanContext.java:610)
at io.micronaut.data.intercept.DataIntroductionAdvice.findInterceptor(DataIntroductionAdvice.java:106)
... 44 common frames omitted
堆栈跟踪表明应用程序上下文中缺少某些内容（可能是 PrimaryRepositoryOperations），但我不清楚那是什么。我该如何纠正这个错误？我是 micronaut 的新手，我认为我缺少一些关键的依赖项或配置。
对于其他上下文我的 pom.xml：
<?xml version="1.0" encoding="UTF-8"?><project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>bling.application</groupId>
<artifactId>bling-application</artifactId>
<version>0.1</version>
<properties>
<micronaut.version>1.2.9</micronaut.version>
<jdk.version>1.8</jdk.version>
<maven.compiler.target>$jdk.version</maven.compiler.target>
<maven.compiler.source>$jdk.version</maven.compiler.source>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<exec.mainClass>my.package.bling.Application</exec.mainClass>
<maven-surefire-plugin.version>2.22.2</maven-surefire-plugin.version>
<maven-failsafe-plugin.version>2.22.2</maven-failsafe-plugin.version>
<mans-core.version>1.0.16-SNAPSHOT</mans-core.version>
<okhttp.version>3.11.0</okhttp.version>
</properties>
<repositories>
<repository>
<id>jcenter.bintray.com</id>
<url>https://jcenter.bintray.com</url>
</repository>
</repositories>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>io.micronaut</groupId>
<artifactId>micronaut-bom</artifactId>
<version>$micronaut.version</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<dependencies>
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
</dependency>
<dependency>
<groupId>com.squareup.okhttp3</groupId>
<artifactId>okhttp</artifactId>
<version>$okhttp.version</version>
</dependency>
<dependency>
<groupId>io.micronaut</groupId>
<artifactId>micronaut-inject</artifactId>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>io.micronaut</groupId>
<artifactId>micronaut-validation</artifactId>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>io.micronaut</groupId>
<artifactId>micronaut-runtime</artifactId>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>io.micronaut</groupId>
<artifactId>micronaut-http-server-netty</artifactId>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>io.micronaut</groupId>
<artifactId>micronaut-http-client</artifactId>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>io.micronaut.data</groupId>
<artifactId>micronaut-data-hibernate-jpa</artifactId>
<version>1.0.0.M5</version>
</dependency>
<dependency>
<groupId>io.micronaut.configuration</groupId>
<artifactId>micronaut-hibernate-jpa</artifactId>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-classic</artifactId>
<version>1.2.3</version>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.junit.jupiter</groupId>
<artifactId>junit-jupiter-api</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.junit.jupiter</groupId>
<artifactId>junit-jupiter-engine</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>io.micronaut.test</groupId>
<artifactId>micronaut-test-junit5</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>3.1.0</version>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<transformers>
<transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
<mainClass>$exec.mainClass</mainClass>
</transformer>
<transformer implementation="org.apache.maven.plugins.shade.resource.ServicesResourceTransformer"/>
</transformers>
</configuration>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>exec-maven-plugin</artifactId>
<version>1.6.0</version>
<configuration>
<executable>java</executable>
<arguments>
<argument>-classpath</argument>
<classpath/>
<argument>-noverify</argument>
<argument>-XX:TieredStopAtLevel=1</argument>
<argument>-Dcom.sun.management.jmxremote</argument>
<argument>$exec.mainClass</argument>
</arguments>
</configuration>
</plugin>
</plugins>
<pluginManagement>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>$maven-surefire-plugin.version</version>
<configuration>
<detail>true</detail>
<includes>
<include>%regex[.*]</include>
</includes>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-failsafe-plugin</artifactId>
<version>$maven-failsafe-plugin.version</version>
<executions>
<execution>
<goals>
<goal>integration-test</goal>
<goal>verify</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.7.0</version>
<configuration>
<compilerArgs>
<arg>-parameters</arg>
</compilerArgs>
<annotationProcessorPaths>
<path>
<groupId>io.micronaut</groupId>
<artifactId>micronaut-inject-java</artifactId>
<version>1.2.9</version>
</path>
<path>
<groupId>io.micronaut</groupId>
<artifactId>micronaut-validation</artifactId>
<version>1.2.9</version>
</path>
<path>
<groupId>io.micronaut.data</groupId>
<artifactId>micronaut-data-processor</artifactId>
<version>1.0.0.M5</version>
</path>
</annotationProcessorPaths>
</configuration>
<executions>
<execution>
<id>test-compile</id>
<goals>
<goal>testCompile</goal>
</goals>
<configuration>
<compilerArgs>
<arg>-parameters</arg>
</compilerArgs>
<annotationProcessorPaths>
<path>
<groupId>io.micronaut</groupId>
<artifactId>micronaut-inject-java</artifactId>
<version>1.2.9</version>
</path>
<path>
<groupId>io.micronaut</groupId>
<artifactId>micronaut-validation</artifactId>
<version>1.2.9</version>
</path>
<path>
<groupId>io.micronaut.data</groupId>
<artifactId>micronaut-data-processor</artifactId>
<version>1.0.0.M5</version>
</path>
</annotationProcessorPaths>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</pluginManagement>
</build>
</project>
【问题讨论】：
【参考方案1】：我遇到了同样的错误，它是由 entity-scan 属性中的包名称不正确引起的。
【讨论】：
【参考方案2】：好的，还有一个答案可能对我所面临的这种特殊情况有所帮助。所以我有一个服务在我应用验证注释后没有被注入。因此，文档页面上明确提到的修复是：
https://docs.micronaut.io/snapshot/guide/index.html#datavalidation
对于 Gradle
implementation("io.micronaut.beanvalidation:micronaut-hibernate-validator")
对于 Maven：
<dependency>
<groupId>io.micronaut.beanvalidation</groupId>
<artifactId>micronaut-hibernate-validator</artifactId>
</dependency>
【讨论】：
【参考方案3】：问题是我的 pom 文件中缺少/冲突的依赖项。为了解决我添加了这个依赖：
<dependency>
<groupId>io.micronaut.configuration</groupId>
<artifactId>micronaut-jdbc-tomcat</artifactId>
<scope>runtime</scope>
</dependency>
并删除了这个：
<dependency>
<groupId>io.micronaut.configuration</groupId>
<artifactId>micronaut-hibernate-jpa</artifactId>
<scope>compile</scope>
</dependency>
【讨论】：
【参考方案4】：我有一个在应用程序启动时查询数据库的事件监听器。如果数据库无法访问，它也会抛出此异常。No bean of type [io.micronaut.data.operations.PrimaryRepositoryOperations] exists 。
@Singleton
open class NativeUserAuthorization(
private val userService: UserServiceOperations): ApplicationEventListener<ServerStartupEvent>
override fun onApplicationEvent(event: ServerStartupEvent?)
// database access here
【讨论】：
【参考方案5】：我在https://github.com/micronaut-projects/micronaut-data 中的一个项目中完全尝试了依赖项，并且成功了。
这些项目也是一个很好的起点。
【讨论】：
github上的这个链接坏了 更新了断开的链接。以上是关于如何解决 micronaut 应用程序中的错误“没有 [io.micronaut.data.operations.PrimaryRepositoryOperations] 类型的 bean”？的主要内容，如果未能解决你的问题，请参考以下文章
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