HR000075: Detected call to non reactive method. Alternative reactive method: `reactiveAssemble`

[Xset-s]

Hi, I'm using Hibernate Reactive 2.0.6.Final and getting HR000075 when I try to call a custom constructor in an HQL query

book (from https://github.com/hibernate/hibernate-reactive/tree/main/examples/session-example, but with a custom constructor):

@Entity
public class Book {
	@Id @GeneratedValue
	private Integer id;

	@Size(min=13, max=13)
	private String isbn;

	...
	
	public Book(Author author) {
		this.author = author;
	}
}

author:

@Entity
public class Author {
	@Id @GeneratedValue
	private Integer id;

	@NotNull @Size(max=100)
	private String name;

	@OneToMany(mappedBy = "author", cascade = PERSIST)
	private List<Book> books = new ArrayList<>();
	
	...
}

code:

// define some test data
Author author1 = new Author("Iain M. Banks");
Author author2 = new Author("Neal Stephenson");
Book book1 = new Book("1-85723-235-6", "Feersum Endjinn", author1, LocalDate.of(1994, JANUARY, 1));
Book book2 = new Book("0-380-97346-4", "Cryptonomicon", author2, LocalDate.of(1999, MAY, 1));
Book book3 = new Book("0-553-08853-X", "Snow Crash", author2, LocalDate.of(1992, JUNE, 1));
author1.getBooks().add(book1);
author2.getBooks().add(book2);
author2.getBooks().add(book3);

factory.withSession(
                            // query the Book titles
                            session -> session.createQuery(
                                            "SELECT NEW Book(book.author) from Book book order by title desc",
                                            Book.class
                                    )
                                    .getResultList()
                    )
                    .await().indefinitely();

exception:

Exception in thread "main" org.hibernate.HibernateException: HR000075: Detected call to non reactive method. Alternative reactive method: `reactiveAssemble`
	at org.hibernate.reactive.sql.results.graph.ReactiveDomainResultsAssembler.assemble(ReactiveDomainResultsAssembler.java:32)
	at org.hibernate.sql.results.graph.instantiation.internal.ArgumentReader.assemble(ArgumentReader.java:35)
	at org.hibernate.sql.results.graph.instantiation.internal.DynamicInstantiationAssemblerConstructorImpl.assemble(DynamicInstantiationAssemblerConstructorImpl.java:46)
	at org.hibernate.reactive.sql.results.internal.ReactiveStandardRowReader.lambda$reactiveReadRow$1(ReactiveStandardRowReader.java:70)
	at org.hibernate.reactive.util.impl.CompletionStages.lambda$loop$7(CompletionStages.java:417)
	at org.hibernate.reactive.util.impl.CompletionStages$ArrayLoop.next(CompletionStages.java:491)
	at org.hibernate.reactive.util.async.impl.AsyncTrampoline.lambda$asyncWhile$1(AsyncTrampoline.java:215)
	at org.hibernate.reactive.util.async.impl.AsyncTrampoline$TrampolineInternal.unroll(AsyncTrampoline.java:121)
	at org.hibernate.reactive.util.async.impl.AsyncTrampoline$TrampolineInternal.trampoline(AsyncTrampoline.java:102)
	at org.hibernate.reactive.util.async.impl.AsyncTrampoline.asyncWhile(AsyncTrampoline.java:197)
	at org.hibernate.reactive.util.async.impl.AsyncTrampoline.asyncWhile(AsyncTrampoline.java:215)
	at org.hibernate.reactive.util.impl.CompletionStages.loop(CompletionStages.java:418)
	at org.hibernate.reactive.util.impl.CompletionStages.loop(CompletionStages.java:389)
	at org.hibernate.reactive.sql.results.internal.ReactiveStandardRowReader.lambda$reactiveReadRow$3(ReactiveStandardRowReader.java:62)
	at java.base/java.util.concurrent.CompletableFuture.uniComposeStage(CompletableFuture.java:1187)
	at java.base/java.util.concurrent.CompletableFuture.thenCompose(CompletableFuture.java:2309)
	at java.base/java.util.concurrent.CompletableFuture.thenCompose(CompletableFuture.java:144)
	at org.hibernate.reactive.sql.results.internal.ReactiveStandardRowReader.reactiveReadRow(ReactiveStandardRowReader.java:60)
	at org.hibernate.reactive.sql.results.spi.ReactiveListResultsConsumer.lambda$addToResultsSupplier$5(ReactiveListResultsConsumer.java:134)
	at org.hibernate.reactive.sql.results.spi.ReactiveListResultsConsumer.lambda$consume$1(ReactiveListResultsConsumer.java:108)
	at java.base/java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:1150)
	at java.base/java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:510)
	at java.base/java.util.concurrent.CompletableFuture.complete(CompletableFuture.java:2147)
	at io.vertx.core.Future.lambda$toCompletionStage$3(Future.java:536)
	at io.vertx.core.impl.future.FutureImpl$3.onSuccess(FutureImpl.java:141)
	at io.vertx.core.impl.future.FutureBase.emitSuccess(FutureBase.java:60)
	at io.vertx.core.impl.future.FutureImpl.tryComplete(FutureImpl.java:211)
	at io.vertx.core.impl.future.PromiseImpl.tryComplete(PromiseImpl.java:23)
	at io.vertx.sqlclient.impl.QueryResultBuilder.tryComplete(QueryResultBuilder.java:88)
	at io.vertx.sqlclient.impl.QueryResultBuilder.tryComplete(QueryResultBuilder.java:32)
	at io.vertx.core.Promise.complete(Promise.java:66)
	at io.vertx.core.Promise.handle(Promise.java:51)
	at io.vertx.core.Promise.handle(Promise.java:29)
	at io.vertx.core.impl.future.FutureImpl$3.onSuccess(FutureImpl.java:141)
	at io.vertx.core.impl.future.FutureBase.lambda$emitSuccess$0(FutureBase.java:54)
	at io.vertx.core.impl.EventLoopContext.execute(EventLoopContext.java:86)
	at io.vertx.core.impl.DuplicatedContext.execute(DuplicatedContext.java:184)
	at io.vertx.core.impl.future.FutureBase.emitSuccess(FutureBase.java:51)
	at io.vertx.core.impl.future.FutureImpl.tryComplete(FutureImpl.java:211)
	at io.vertx.core.impl.future.PromiseImpl.tryComplete(PromiseImpl.java:23)
	at io.vertx.core.impl.future.PromiseImpl.onSuccess(PromiseImpl.java:49)
	at io.vertx.core.impl.future.PromiseImpl.handle(PromiseImpl.java:41)
	at io.vertx.core.impl.future.PromiseImpl.handle(PromiseImpl.java:23)
	at io.vertx.sqlclient.impl.command.CommandResponse.fire(CommandResponse.java:46)
	at io.vertx.sqlclient.impl.SocketConnectionBase.handleMessage(SocketConnectionBase.java:325)
	at io.vertx.sqlclient.impl.SocketConnectionBase.lambda$init$0(SocketConnectionBase.java:138)
	at io.vertx.core.impl.EventLoopContext.emit(EventLoopContext.java:55)
	at io.vertx.core.impl.ContextBase.emit(ContextBase.java:297)
	at io.vertx.core.net.impl.NetSocketImpl.handleMessage(NetSocketImpl.java:378)
	at io.vertx.core.net.impl.ConnectionBase.read(ConnectionBase.java:159)
	at io.vertx.core.net.impl.VertxHandler.channelRead(VertxHandler.java:153)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:442)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
	at io.netty.channel.CombinedChannelDuplexHandler$DelegatingChannelHandlerContext.fireChannelRead(CombinedChannelDuplexHandler.java:436)
	at io.vertx.mysqlclient.impl.codec.MySQLEncoder.handleCommandResponse(MySQLEncoder.java:63)
	at io.vertx.mysqlclient.impl.codec.QueryCommandBaseCodec.handleAllResultsetDecodingCompleted(QueryCommandBaseCodec.java:175)
	at io.vertx.mysqlclient.impl.codec.ExtendedQueryCommandBaseCodec.handleAllResultsetDecodingCompleted(ExtendedQueryCommandBaseCodec.java:51)
	at io.vertx.mysqlclient.impl.codec.QueryCommandBaseCodec.handleSingleResultsetDecodingCompleted(QueryCommandBaseCodec.java:136)
	at io.vertx.mysqlclient.impl.codec.QueryCommandBaseCodec.handleRows(QueryCommandBaseCodec.java:124)
	at io.vertx.mysqlclient.impl.codec.QueryCommandBaseCodec.decodePayload(QueryCommandBaseCodec.java:66)
	at io.vertx.mysqlclient.impl.codec.ExtendedQueryCommandCodec.decodePayload(ExtendedQueryCommandCodec.java:108)
	at io.vertx.mysqlclient.impl.codec.MySQLDecoder.decodePackets(MySQLDecoder.java:72)
	at io.vertx.mysqlclient.impl.codec.MySQLDecoder.channelRead(MySQLDecoder.java:48)
	at io.netty.channel.CombinedChannelDuplexHandler.channelRead(CombinedChannelDuplexHandler.java:251)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:442)
	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.channelRead(ByteToMessageDecoder.java:318)
	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:840)

[DavideD]

I don't think you can pass an associated entity to the constructor using HQL. I will check.

It should work if you pass the single attributes: select new Book(a.id, a.name, ...) from Book b left join b.author a

[gavinking]

I don't think you can pass an associated entity to the constructor using HQL.

I believe you can, actually.

[DavideD]

Ok, I will mark it as a bug.