私はSpring Data Mongodbライブラリを使用していますが、@Queryによって@DBRefで結合された2つのコレクションの要素は次のようになります。MappingException：無効なパス参照club.name！アソシエーションは、直接またはidプロパティを介してのみ指すことができます
ユーザー：
@Document
public class User {
@Id
@JsonSerialize(using=ObjectIdSerializer.class)
private ObjectId id;
@CreatedDate
private Date dateCreated = new Date();
@LastModifiedDate
private Date dateModified = new Date();
@NotEmpty
@Indexed
private String name;
@Language
private String lang;
@NotEmpty
@DBRef
private Club club;
...
クラブ：
@Document
public class Club {
@Id
@JsonSerialize(using=ObjectIdSerializer.class)
private ObjectId id;
@Indexed(unique = true)
private String name;
private Address address;
...
UserRepository：
@Query("{\"$or\":"
+ "["
+ "{\"name\" : {\"$regex\" : ?0, \"$options\": \"i\"}}, "
+ "{\"club.name\" : {\"$regex\" : ?0, \"$options\": \"i\"}} "
+ "]"
+ "}")
public Page<User> findAll(String query, Pageable pageable);
エラー：
org.springframework.web.util.NestedServletException: Request processing failed; nested exception is org.springframework.data.mapping.model.MappingException: Invalid path reference club.name! Associations can only be pointed to directly or via their id property! at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:980) at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:859) at javax.servlet.http.HttpServlet.service(HttpServlet.java:622) at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:844) at org.springframework.test.web.servlet.TestDispatcherServlet.service(TestDispatcherServlet.java:65) at javax.servlet.http.HttpServlet.service(HttpServlet.java:729) at org.springframework.mock.web.MockFilterChain$ServletFilterProxy.doFilter(MockFilterChain.java:167) at org.springframework.mock.web.MockFilterChain.doFilter(MockFilterChain.java:134) at org.springframework.test.web.servlet.MockMvc.perform(MockMvc.java:155) at it.stasbranger.rotarylive.controller.UserControllerTests.showUsersFilterTEST3(UserControllerTests.java:137) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47) at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17) at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26) at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:75) at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:86) at com.lordofthejars.nosqlunit.core.AbstractNoSqlTestRule$1.evaluate(AbstractNoSqlTestRule.java:72) at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:84) at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325) at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:254) at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:89) at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290) at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288) at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58) at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268) at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61) at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70) at org.junit.rules.ExternalResource$1.evaluate(ExternalResource.java:48) at org.junit.rules.RunRules.evaluate(RunRules.java:20) at org.junit.runners.ParentRunner.run(ParentRunner.java:363) at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:193) at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86) at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192) Caused by: org.springframework.data.mapping.model.MappingException: Invalid path reference club.name! Associations can only be pointed to directly or via their id property! at org.springframework.data.mongodb.core.convert.QueryMapper$MetadataBackedField.getPath(QueryMapper.java:853) at org.springframework.data.mongodb.core.convert.QueryMapper$MetadataBackedField.(QueryMapper.java:729) at org.springframework.data.mongodb.core.convert.QueryMapper$MetadataBackedField.(QueryMapper.java:706) at org.springframework.data.mongodb.core.convert.QueryMapper.createPropertyField(QueryMapper.java:216) at org.springframework.data.mongodb.core.convert.QueryMapper.getMappedObject(QueryMapper.java:122) at org.springframework.data.mongodb.core.convert.QueryMapper.getMappedKeyword(QueryMapper.java:235) at org.springframework.data.mongodb.core.convert.QueryMapper.getMappedObject(QueryMapper.java:100) at org.springframework.data.mongodb.core.MongoTemplate.count(MongoTemplate.java:724) at org.springframework.data.mongodb.repository.query.AbstractMongoQuery$PagedExecution.execute(AbstractMongoQuery.java:268) at org.springframework.data.mongodb.repository.query.AbstractMongoQuery.execute(AbstractMongoQuery.java:106) at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.doInvoke(RepositoryFactorySupport.java:462) at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.invoke(RepositoryFactorySupport.java:440) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) at org.springframework.data.projection.DefaultMethodInvokingMethodInterceptor.invoke(DefaultMethodInvokingMethodInterceptor.java:61) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:208) at com.sun.proxy.$Proxy132.findAll(Unknown Source) at it.stasbranger.rotarylive.service.UserServiceImpl.findAll(UserServiceImpl.java:71) at it.stasbranger.rotarylive.controller.UserController.showUsers(UserController.java:53) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:221) at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:136) at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:110) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:817) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:731) at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85) at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:959) at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:893) at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:968) ... 42 more
関連：https://stackoverflow.com/questions/33478506/spring-data-query-over-two-documents –