Skip to content
New issue

Have a question about this project? # for a free GitHub account to open an issue and contact its maintainers and the community.

#

By clicking “#”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? # to your account

Jump to bottom

Embedded entities can not be constructed when they use Kotlin val properties #1677

Open
koenpunt opened this issue Nov 27, 2023 · 6 comments
Open

Embedded entities can not be constructed when they use Kotlin val properties #1677

koenpunt opened this issue Nov 27, 2023 · 6 comments
Assignees
@mp911de
Labels
status: waiting-for-triage An issue we've not yet triaged

Comments

@koenpunt
Copy link
Contributor

To retrieve results indexed by a specific column (relation_id), we use "pair" classes. For example;

// Repository method
@Query(
    """
        SELECT o.id AS relation_id, c.* FROM customer_details c
        JOIN orders o ON o.customer_details_id = c.id
        WHERE o.id IN (:ids)
    """
)
suspend fun findAllByOrderIdIn(ids: Iterable<UUID>): List<CustomerDetailsPair>

// ...

// The virtual pair entity
data class CustomerDetailsPair(
    override val relationId: UUID,
    @Embedded.Empty
    override val entity: CustomerDetails,
)

// The CustomerDetails entity
@Table(name = "customer_details")
class CustomerDetails(
    val name: String,
    var email: String?,
)

But this results in the following exception being thrown:

Cannot set property name because no setter, no wither and it's not part of the persistence constructor public oopen.timemachine.entities.CustomerDetails(java.lang.String,java.lang.String)

When changing the name property to a var, no error is thrown. The entity as a standalone entity, so not embedded, can be constructed without changing the property to a var.
@spring-projects-issues spring-projects-issues added the status: waiting-for-triage An issue we've not yet triaged label Nov 27, 2023
@mp911de
Copy link
Member

mp911de commented Nov 27, 2023

Care to include the full stack trace?

@koenpunt
Copy link
Contributor Author

Here you go:

Caused by: java.lang.IllegalStateException: Cannot set property name because no setter, no wither and it's not part of the persistence constructor public oopen.timemachine.entities.CustomerDetails(java.lang.String,java.lang.String,com.google.i18n.phonenumbers.Phonenumber$PhoneNumber,java.util.UUID,boolean,java.util.UUID,boolean)
	at org.springframework.data.mapping.model.InstantiationAwarePropertyAccessor.setProperty(InstantiationAwarePropertyAccessor.java:93)
	at org.springframework.data.mapping.model.ConvertingPropertyAccessor.setProperty(ConvertingPropertyAccessor.java:60)
	at org.springframework.data.relational.core.conversion.MappingRelationalConverter.readProperties(MappingRelationalConverter.java:556)
	at org.springframework.data.relational.core.conversion.MappingRelationalConverter.populateProperties(MappingRelationalConverter.java:523)
	at org.springframework.data.relational.core.conversion.MappingRelationalConverter.read(MappingRelationalConverter.java:457)
	at org.springframework.data.relational.core.conversion.MappingRelationalConverter.readEmbedded(MappingRelationalConverter.java:566)
	at org.springframework.data.relational.core.conversion.MappingRelationalConverter$2.getPropertyValue(MappingRelationalConverter.java:490)
	at org.springframework.data.relational.core.conversion.MappingRelationalConverter$2.getPropertyValue(MappingRelationalConverter.java:475)
	at org.springframework.data.mapping.model.PersistentEntityParameterValueProvider.getParameterValue(PersistentEntityParameterValueProvider.java:71)
	at org.springframework.data.relational.core.conversion.MappingRelationalConverter$ConvertingParameterValueProvider.getParameterValue(MappingRelationalConverter.java:1161)
	at org.springframework.data.mapping.model.SpELExpressionParameterValueProvider.getParameterValue(SpELExpressionParameterValueProvider.java:49)
	at org.springframework.data.mapping.model.ClassGeneratingEntityInstantiator.extractInvocationArguments(ClassGeneratingEntityInstantiator.java:301)
	at org.springframework.data.mapping.model.ClassGeneratingEntityInstantiator$EntityInstantiatorAdapter.createInstance(ClassGeneratingEntityInstantiator.java:273)
	at org.springframework.data.mapping.model.ClassGeneratingEntityInstantiator.createInstance(ClassGeneratingEntityInstantiator.java:98)
	at org.springframework.data.relational.core.conversion.MappingRelationalConverter.read(MappingRelationalConverter.java:454)
	at org.springframework.data.relational.core.conversion.MappingRelationalConverter.readAggregate(MappingRelationalConverter.java:348)
	at org.springframework.data.relational.core.conversion.MappingRelationalConverter.readAggregate(MappingRelationalConverter.java:311)
	at org.springframework.data.relational.core.conversion.MappingRelationalConverter.read(MappingRelationalConverter.java:298)
	at org.springframework.data.relational.core.conversion.MappingRelationalConverter.read(MappingRelationalConverter.java:294)
	at org.springframework.data.r2dbc.core.R2dbcEntityTemplate.lambda$getRowsFetchSpec$13(R2dbcEntityTemplate.java:795)
	at io.r2dbc.proxy.callback.ResultCallbackHandler.lambda$invoke$0(ResultCallbackHandler.java:92)
	at io.r2dbc.proxy.callback.ResultCallbackHandler.lambda$invoke$0(ResultCallbackHandler.java:92)
	at io.r2dbc.postgresql.PostgresqlResult.lambda$map$2(PostgresqlResult.java:129)
	at reactor.core.publisher.ContextPropagation.lambda$contextRestoreForHandle$2(ContextPropagation.java:173)
	at reactor.core.publisher.FluxHandle$HandleSubscriber.onNext(FluxHandle.java:113)
	at reactor.core.publisher.MonoFlatMapMany$FlatMapManyInner.onNext(MonoFlatMapMany.java:250)
	at reactor.core.publisher.FluxHandleFuseable$HandleFuseableSubscriber.onNext(FluxHandleFuseable.java:194)
	at reactor.core.publisher.FluxFilterFuseable$FilterFuseableConditionalSubscriber.onNext(FluxFilterFuseable.java:337)
	at reactor.core.publisher.FluxContextWrite$ContextWriteSubscriber.onNext(FluxContextWrite.java:107)
	at reactor.core.publisher.FluxPeekFuseable$PeekConditionalSubscriber.onNext(FluxPeekFuseable.java:854)
	at reactor.core.publisher.FluxPeekFuseable$PeekConditionalSubscriber.onNext(FluxPeekFuseable.java:854)
	at io.r2dbc.postgresql.util.FluxDiscardOnCancel$FluxDiscardOnCancelSubscriber.onNext(FluxDiscardOnCancel.java:91)
	at reactor.core.publisher.FluxDoFinally$DoFinallySubscriber.onNext(FluxDoFinally.java:113)
	at reactor.core.publisher.FluxHandle$HandleSubscriber.onNext(FluxHandle.java:129)
	at reactor.core.publisher.FluxCreate$BufferAsyncSink.drain(FluxCreate.java:880)
	at reactor.core.publisher.FluxCreate$BufferAsyncSink.next(FluxCreate.java:805)
	at reactor.core.publisher.FluxCreate$SerializedFluxSink.next(FluxCreate.java:163)
	at io.r2dbc.postgresql.client.ReactorNettyClient$Conversation.emit(ReactorNettyClient.java:684)
	at io.r2dbc.postgresql.client.ReactorNettyClient$BackendMessageSubscriber.emit(ReactorNettyClient.java:936)
	at io.r2dbc.postgresql.client.ReactorNettyClient$BackendMessageSubscriber.onNext(ReactorNettyClient.java:810)
	at io.r2dbc.postgresql.client.ReactorNettyClient$BackendMessageSubscriber.onNext(ReactorNettyClient.java:716)
	at reactor.core.publisher.FluxHandle$HandleSubscriber.onNext(FluxHandle.java:129)
	at reactor.core.publisher.FluxPeekFuseable$PeekConditionalSubscriber.onNext(FluxPeekFuseable.java:854)
	at reactor.core.publisher.FluxMap$MapConditionalSubscriber.onNext(FluxMap.java:224)
	at reactor.core.publisher.FluxMap$MapConditionalSubscriber.onNext(FluxMap.java:224)
	at reactor.netty.channel.FluxReceive.drainReceiver(FluxReceive.java:294)
	at reactor.netty.channel.FluxReceive.onInboundNext(FluxReceive.java:403)
	at reactor.netty.channel.ChannelOperations.onInboundNext(ChannelOperations.java:426)
	at reactor.netty.channel.ChannelOperationsHandler.channelRead(ChannelOperationsHandler.java:114)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
	at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:346)
	at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:333)
	at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:454)
	at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:290)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
	at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:440)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
	at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919)
	at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:166)
	at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:788)
	at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:724)
	at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:650)
	at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:562)
	at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:997)
	at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
	at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
	at java.base/java.lang.Thread.run(Thread.java:1623)

@koenpunt
Copy link
Contributor Author

Just found out that it doesn't throw an exception when making the CustomerDetails entity a data class, but we're not sure what side effects that could have.

@mp911de
Copy link
Member

mp911de commented Nov 27, 2023 •
edited
Loading

CustomerDetailsPair uses overridden properties. That's not supported as Kotlin creates two properties without being able to set reliably both.

Without the override keyword, I'm not able to reproduce the issue.

@koenpunt
Copy link
Contributor Author

koenpunt commented Nov 27, 2023 •
edited
Loading

For completeness, the pair class implements an interface, and doesn't inherit from a class;

data class CustomerDetailsPair(
    override val relationId: UUID,
    @Embedded.Empty
    override val entity: CustomerDetails,
) : EntityPair<UUID, CustomerDetails>

interface EntityPair<F, S> {
    val relationId: F
    val entity: S
}

But also when I remove the interface and the override from the properties of the pair the exception is thrown.

@mp911de mp911de self-assigned this Nov 27, 2023
@koenpunt
Copy link
Contributor Author

@mp911de I noticed you assigned yourself; do you maybe have an update regarding this?

# for free to join this conversation on GitHub. Already have an account? # to comment
Assignees

@mp911de mp911de

Labels
status: waiting-for-triage An issue we've not yet triaged
Projects
None yet
Milestone
No milestone
Development

No branches or pull requests
3 participants
@koenpunt @mp911de @spring-projects-issues