repository method returning different type of entity than repository entity

[mikereiche]

Edit: The two issues mentioned here will be resolved in #1208.

public UserVO findByName(String name)

I tested this and it is currently possible - with two caveats.
You must define a UserV0Repository, even if you never use it. If you do not, you'll get an exception stating that there is no converter. (I think you've hit this before when you attempted this).
The issue is that the UserV0 type will not be in the mapper's type system, and instead of adding the type, it just gives up.

@Repository
public interface UserV0Repository extends CouchbaseRepository<UserV0, String>

2. UserV0 must have only fields with names matching the repository entity. Otherwise you'll get a NullPointerException.

[mikereiche]

Without a repository defined, the following exception is produced:

org.springframework.core.convert.ConversionFailedException: Failed to convert from type [java.util.ArrayList<?>] to type [@org.springframework.data.couchbase.repository.ScanConsistency java.util.List<org.springframework.data.couchbase.domain.AirportMini>] for value '[{"id":"airports::vie","iata":"vie","icao":"low6","version":1631222217750413312,"createdBy":"nonreactive_auditor","expiration":0}]'; nested exception is org.springframework.core.convert.ConverterNotFoundException: No converter found capable of converting from type [org.springframework.data.couchbase.domain.Airport] to type [@org.springframework.data.couchbase.repository.ScanConsistency org.springframework.data.couchbase.domain.AirportMini]

	at org.springframework.core.convert.support.ConversionUtils.invokeConverter(ConversionUtils.java:47)
	at org.springframework.core.convert.support.GenericConversionService.convert(GenericConversionService.java:192)
	at org.springframework.core.convert.support.GenericConversionService.convert(GenericConversionService.java:213)
	at org.springframework.data.repository.core.support.QueryExecutionResultHandler.postProcessInvocationResult(QueryExecutionResultHandler.java:167)
	at org.springframework.data.repository.core.support.QueryExecutionResultHandler.postProcessInvocationResult(QueryExecutionResultHandler.java:77)
	at org.springframework.data.repository.core.support.QueryExecutorMethodInterceptor.invoke(QueryExecutorMethodInterceptor.java:138)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
	at org.springframework.data.projection.DefaultMethodInvokingMethodInterceptor.invoke(DefaultMethodInvokingMethodInterceptor.java:80)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
	at org.springframework.data.couchbase.repository.support.CrudMethodMetadataPostProcessor$CrudMethodMetadataPopulatingMethodInterceptor.invoke(CrudMethodMetadataPostProcessor.java:141)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
	at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:97)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
	at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:215)
	at jdk.proxy2/jdk.proxy2.$Proxy88.getByIata(Unknown Source)
	at org.springframework.data.couchbase.repository.CouchbaseRepositoryQueryIntegrationTests.findBySimplePropertyReturnType(CouchbaseRepositoryQueryIntegrationTests.java:254)
.
.
.
Caused by: org.springframework.core.convert.ConverterNotFoundException: No converter found capable of converting from type [org.springframework.data.couchbase.domain.Airport] to type [@org.springframework.data.couchbase.repository.ScanConsistency org.springframework.data.couchbase.domain.AirportMini]
	at org.springframework.core.convert.support.GenericConversionService.handleConverterNotFound(GenericConversionService.java:322)
	at org.springframework.core.convert.support.GenericConversionService.convert(GenericConversionService.java:195)
	at org.springframework.core.convert.support.CollectionToCollectionConverter.convert(CollectionToCollectionConverter.java:89)
	at org.springframework.core.convert.support.ConversionUtils.invokeConverter(ConversionUtils.java:41)

[mikereiche]

If there a fields in the return-type class that are not in the repository-entity class, the following exception is produced:

java.lang.IllegalArgumentException: Property must not be null!

	at org.springframework.util.Assert.notNull(Assert.java:201)
	at org.springframework.data.couchbase.domain.Airport_Accessor_y2ak28.getProperty(Unknown Source)
	at org.springframework.data.mapping.model.InstantiationAwarePropertyAccessor.getProperty(InstantiationAwarePropertyAccessor.java:156)
	at org.springframework.data.couchbase.repository.query.DtoInstantiatingConverter$2.doWithPersistentProperty(DtoInstantiatingConverter.java:103)
	at org.springframework.data.mapping.model.BasicPersistentEntity.doWithProperties(BasicPersistentEntity.java:374)
	at org.springframework.data.couchbase.repository.query.DtoInstantiatingConverter.convert(DtoInstantiatingConverter.java:93)
	at org.springframework.data.repository.query.ResultProcessor$ChainingConverter.convert(ResultProcessor.java:240)
	at org.springframework.data.repository.query.ResultProcessor$ChainingConverter.lambda$and$0(ResultProcessor.java:226)
	at org.springframework.data.repository.query.ResultProcessor$ChainingConverter.convert(ResultProcessor.java:240)
	at org.springframework.data.repository.query.ResultProcessor.processResult(ResultProcessor.java:156)
	at org.springframework.data.couchbase.repository.query.ResultProcessingConverter.convert(ResultProcessingConverter.java:84)
	at org.springframework.data.couchbase.repository.query.CouchbaseQueryExecution$ResultProcessingExecution.execute(CouchbaseQueryExecution.java:87)
	at org.springframework.data.couchbase.repository.query.AbstractCouchbaseQuery.doExecute(AbstractCouchbaseQuery.java:90)
	at org.springframework.data.couchbase.repository.query.AbstractCouchbaseQueryBase.execute(AbstractCouchbaseQueryBase.java:133)
	at org.springframework.data.couchbase.repository.query.AbstractCouchbaseQueryBase.execute(AbstractCouchbaseQueryBase.java:113)
	at org.springframework.data.repository.core.support.RepositoryMethodInvoker.doInvoke(RepositoryMethodInvoker.java:137)
	at org.springframework.data.repository.core.support.RepositoryMethodInvoker.invoke(RepositoryMethodInvoker.java:121)
	at org.springframework.data.repository.core.support.QueryExecutorMethodInterceptor.doInvoke(QueryExecutorMethodInterceptor.java:159)
	at org.springframework.data.repository.core.support.QueryExecutorMethodInterceptor.invoke(QueryExecutorMethodInterceptor.java:138)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
	at org.springframework.data.projection.DefaultMethodInvokingMethodInterceptor.invoke(DefaultMethodInvokingMethodInterceptor.java:80)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
	at org.springframework.data.couchbase.repository.support.CrudMethodMetadataPostProcessor$CrudMethodMetadataPopulatingMethodInterceptor.invoke(CrudMethodMetadataPostProcessor.java:141)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
	at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:97)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
	at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:215)
	at jdk.proxy2/jdk.proxy2.$Proxy84.getByIata(Unknown Source)
	at org.springframework.data.couchbase.repository.CouchbaseRepositoryQueryIntegrationTests.findBySimplePropertyReturnType(CouchbaseRepositoryQueryIntegrationTests.java:254)

[mikereiche]

fixed with #1208