GH-2728 - Check current Cypher-DSL dialect before issuing queries.

Make sure we ignore invalid dialect config (i.e. we actually have neo4j 5, but are on 4 dialect in a crucial mapping path.

src/main/java/org/springframework/data/neo4j/core/Neo4jTemplate.java

@@ -814,7 +814,7 @@ private <T> T processNestedRelations(
 					relatedInternalId = stateMachine.getObjectId(relatedValueToStore);
 				} else {
 					savedEntity = saveRelatedNode(newRelatedObject, targetEntity, includeProperty, currentPropertyPath);
-					relatedInternalId = IdentitySupport.getElementId(savedEntity);
+					relatedInternalId = TemplateSupport.rendererCanUseElementIdIfPresent(renderer) ? savedEntity.elementId() : Long.toString(savedEntity.id());
 					stateMachine.markEntityAsProcessed(relatedValueToStore, relatedInternalId);
 					if (relatedValueToStore instanceof MappingSupport.RelationshipPropertiesWithEntityHolder) {
 						Object entity = ((MappingSupport.RelationshipPropertiesWithEntityHolder) relatedValueToStore).getRelatedEntity();

src/main/java/org/springframework/data/neo4j/core/ReactiveNeo4jTemplate.java

@@ -952,7 +952,7 @@ private <T> Mono<T> processNestedRelations(Neo4jPersistentEntity<?> sourceEntity
 								queryOrSave = Mono.just(Tuples.of(relatedInternalId, new AtomicReference<>()));
 							} else {
 								queryOrSave = saveRelatedNode(newRelatedObject, targetEntity, includeProperty, currentPropertyPath)
-										.map(entity -> Tuples.of(new AtomicReference<>(IdentitySupport.getElementId(entity)), new AtomicReference<>(entity)))
+										.map(entity -> Tuples.of(new AtomicReference<>(TemplateSupport.rendererCanUseElementIdIfPresent(renderer) ? entity.elementId() : Long.toString(entity.id())), new AtomicReference<>(entity)))
 										.doOnNext(t -> {
 											var relatedInternalId = t.getT1().get();
 											stateMachine.markEntityAsProcessed(relatedValueToStore, relatedInternalId);

src/main/java/org/springframework/data/neo4j/core/TemplateSupport.java

@@ -39,6 +39,7 @@
 import org.neo4j.cypherdsl.core.Node;
 import org.neo4j.cypherdsl.core.Relationship;
 import org.neo4j.cypherdsl.core.Statement;
+import org.neo4j.cypherdsl.core.renderer.Renderer;
 import org.neo4j.driver.types.Entity;
 import org.neo4j.driver.types.MapAccessor;
 import org.neo4j.driver.types.TypeSystem;
@@ -410,6 +411,15 @@ static <T> String retrieveOrSetRelatedId(
 		return Objects.requireNonNull(relatedInternalId);
 	}
 
+	/**
+	 * Checks if the renderer is configured in such a way that it will use element id or apply toString(id(n)) workaround.
+	 * @return {@literal true} if renderer will use elementId
+	 */
+	static boolean rendererCanUseElementIdIfPresent(Renderer renderer) {
+		return renderer.render(Cypher.returning(Functions.elementId(Cypher.anyNode("n"))).build())
+				.equals("RETURN elementId(n)");
+	}
+
 	private TemplateSupport() {
 	}
 }

src/test/java/org/springframework/data/neo4j/integration/issues/gh2728/AbstractReactiveTestBase.java

@@ -0,0 +1,103 @@
+/*
+ * Copyright 2011-2023 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.data.neo4j.integration.issues.gh2728;
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+import org.neo4j.driver.Driver;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.annotation.Bean;
+import org.springframework.data.neo4j.core.ReactiveDatabaseSelectionProvider;
+import org.springframework.data.neo4j.core.transaction.Neo4jBookmarkManager;
+import org.springframework.data.neo4j.core.transaction.ReactiveNeo4jTransactionManager;
+import org.springframework.data.neo4j.repository.ReactiveNeo4jRepository;
+import org.springframework.data.neo4j.test.BookmarkCapture;
+import org.springframework.data.neo4j.test.Neo4jExtension;
+import org.springframework.data.neo4j.test.Neo4jIntegrationTest;
+import org.springframework.data.neo4j.test.Neo4jReactiveTestConfiguration;
+import org.springframework.transaction.ReactiveTransactionManager;
+
+/**
+ * @author Michael J. Simons
+ */
+@Neo4jIntegrationTest
+public abstract class AbstractReactiveTestBase {
+
+	protected static Neo4jExtension.Neo4jConnectionSupport neo4jConnectionSupport;
+
+	@Autowired
+	private TestEntityWithGeneratedDeprecatedId1Repository generatedDeprecatedIdRepository;
+
+	@Autowired
+	private TestEntityWithAssignedId1Repository assignedIdRepository;
+
+	@Test
+	public void testGeneratedDeprecatedIds() {
+		TestEntityWithGeneratedDeprecatedId2 t2 = new TestEntityWithGeneratedDeprecatedId2(null, "v2");
+		TestEntityWithGeneratedDeprecatedId1 t1 = new TestEntityWithGeneratedDeprecatedId1(null, "v1", t2);
+
+		TestEntityWithGeneratedDeprecatedId1 result = generatedDeprecatedIdRepository.save(t1).block();
+
+		TestEntityWithGeneratedDeprecatedId1 freshRetrieved = generatedDeprecatedIdRepository.findById(result.getId()).block();
+
+		Assertions.assertNotNull(result.getRelatedEntity());
+		Assertions.assertNotNull(freshRetrieved.getRelatedEntity());
+	}
+
+	/**
+	 * This is a test to ensure if the fix for the failing test above will continue to work for
+	 * assigned ids. For broader test cases please return false for isCypher5Compatible in (Reactive)RepositoryIT
+	 */
+	@Test
+	public void testAssignedIds() {
+		TestEntityWithAssignedId2 t2 = new TestEntityWithAssignedId2("second", "v2");
+		TestEntityWithAssignedId1 t1 = new TestEntityWithAssignedId1("first", "v1", t2);
+
+		TestEntityWithAssignedId1 result = assignedIdRepository.save(t1).block();
+
+		TestEntityWithAssignedId1 freshRetrieved = assignedIdRepository.findById(result.getAssignedId()).block();
+
+		Assertions.assertNotNull(result.getRelatedEntity());
+		Assertions.assertNotNull(freshRetrieved.getRelatedEntity());
+	}
+
+	interface TestEntityWithGeneratedDeprecatedId1Repository extends ReactiveNeo4jRepository<TestEntityWithGeneratedDeprecatedId1, Long> {
+	}
+
+	interface TestEntityWithAssignedId1Repository extends ReactiveNeo4jRepository<TestEntityWithAssignedId1, String> {
+	}
+
+	abstract static class Config extends Neo4jReactiveTestConfiguration {
+
+		@Bean
+		public Driver driver() {
+
+			return neo4jConnectionSupport.getDriver();
+		}
+
+		@Bean
+		public BookmarkCapture bookmarkCapture() {
+			return new BookmarkCapture();
+		}
+
+		@Override
+		public ReactiveTransactionManager reactiveTransactionManager(Driver driver, ReactiveDatabaseSelectionProvider databaseSelectionProvider) {
+
+			BookmarkCapture bookmarkCapture = bookmarkCapture();
+			return new ReactiveNeo4jTransactionManager(driver, databaseSelectionProvider, Neo4jBookmarkManager.create(bookmarkCapture));
+		}
+	}
+}

src/test/java/org/springframework/data/neo4j/integration/issues/gh2728/AbstractTestBase.java

@@ -0,0 +1,104 @@
+/*
+ * Copyright 2011-2023 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.data.neo4j.integration.issues.gh2728;
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+import org.neo4j.driver.Driver;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.annotation.Bean;
+import org.springframework.data.neo4j.core.DatabaseSelectionProvider;
+import org.springframework.data.neo4j.core.transaction.Neo4jBookmarkManager;
+import org.springframework.data.neo4j.core.transaction.Neo4jTransactionManager;
+import org.springframework.data.neo4j.repository.Neo4jRepository;
+import org.springframework.data.neo4j.test.BookmarkCapture;
+import org.springframework.data.neo4j.test.Neo4jExtension;
+import org.springframework.data.neo4j.test.Neo4jImperativeTestConfiguration;
+import org.springframework.data.neo4j.test.Neo4jIntegrationTest;
+import org.springframework.transaction.PlatformTransactionManager;
+
+/**
+ * @author Gerrit Meier
+ */
+@Neo4jIntegrationTest
+public abstract class AbstractTestBase {
+
+	protected static Neo4jExtension.Neo4jConnectionSupport neo4jConnectionSupport;
+
+	@Autowired
+	private TestEntityWithGeneratedDeprecatedId1Repository generatedDeprecatedIdRepository;
+
+	@Autowired
+	private TestEntityWithAssignedId1Repository assignedIdRepository;
+
+	@Test
+	public void testGeneratedDeprecatedIds() {
+		TestEntityWithGeneratedDeprecatedId2 t2 = new TestEntityWithGeneratedDeprecatedId2(null, "v2");
+		TestEntityWithGeneratedDeprecatedId1 t1 = new TestEntityWithGeneratedDeprecatedId1(null, "v1", t2);
+
+		TestEntityWithGeneratedDeprecatedId1 result = generatedDeprecatedIdRepository.save(t1);
+
+		TestEntityWithGeneratedDeprecatedId1 freshRetrieved = generatedDeprecatedIdRepository.findById(result.getId()).get();
+
+		Assertions.assertNotNull(result.getRelatedEntity());
+		Assertions.assertNotNull(freshRetrieved.getRelatedEntity());
+	}
+
+	/**
+	 * This is a test to ensure if the fix for the failing test above will continue to work for
+	 * assigned ids. For broader test cases please return false for isCypher5Compatible in (Reactive)RepositoryIT
+	 */
+	@Test
+	public void testAssignedIds() {
+		TestEntityWithAssignedId2 t2 = new TestEntityWithAssignedId2("second", "v2");
+		TestEntityWithAssignedId1 t1 = new TestEntityWithAssignedId1("first", "v1", t2);
+
+		TestEntityWithAssignedId1 result = assignedIdRepository.save(t1);
+
+		TestEntityWithAssignedId1 freshRetrieved = assignedIdRepository.findById(result.getAssignedId()).get();
+
+		Assertions.assertNotNull(result.getRelatedEntity());
+		Assertions.assertNotNull(freshRetrieved.getRelatedEntity());
+	}
+
+	interface TestEntityWithGeneratedDeprecatedId1Repository extends Neo4jRepository<TestEntityWithGeneratedDeprecatedId1, Long> {
+	}
+
+	interface TestEntityWithAssignedId1Repository extends Neo4jRepository<TestEntityWithAssignedId1, String> {
+	}
+
+	abstract static class Config extends Neo4jImperativeTestConfiguration {
+
+		@Bean
+		public Driver driver() {
+
+			return neo4jConnectionSupport.getDriver();
+		}
+
+		@Bean
+		public BookmarkCapture bookmarkCapture() {
+			return new BookmarkCapture();
+		}
+
+		@Override
+		public PlatformTransactionManager transactionManager(Driver driver,
+		                                                     DatabaseSelectionProvider databaseNameProvider) {
+			BookmarkCapture bookmarkCapture = bookmarkCapture();
+			return new Neo4jTransactionManager(driver, databaseNameProvider,
+					Neo4jBookmarkManager.create(bookmarkCapture));
+		}
+	}
+}

src/test/java/org/springframework/data/neo4j/integration/issues/gh2728/CorrectConfigIT.java

@@ -0,0 +1,38 @@
+/*
+ * Copyright 2011-2023 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.data.neo4j.integration.issues.gh2728;
+
+import org.springframework.context.annotation.Configuration;
+import org.springframework.data.neo4j.repository.config.EnableNeo4jRepositories;
+import org.springframework.data.neo4j.test.Neo4jIntegrationTest;
+import org.springframework.transaction.annotation.EnableTransactionManagement;
+
+/**
+ * @author Michael J. Simons
+ */
+@Neo4jIntegrationTest
+public class CorrectConfigIT extends AbstractTestBase {
+
+	@Configuration
+	@EnableTransactionManagement
+	@EnableNeo4jRepositories(considerNestedRepositories = true)
+	static class Config extends AbstractTestBase.Config {
+		@Override
+		public boolean isCypher5Compatible() {
+			return AbstractTestBase.neo4jConnectionSupport.isCypher5SyntaxCompatible();
+		}
+	}
+}

src/test/java/org/springframework/data/neo4j/integration/issues/gh2728/CorrectReactiveConfigIT.java

@@ -0,0 +1,38 @@
+/*
+ * Copyright 2011-2023 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.data.neo4j.integration.issues.gh2728;
+
+import org.springframework.context.annotation.Configuration;
+import org.springframework.data.neo4j.repository.config.EnableReactiveNeo4jRepositories;
+import org.springframework.data.neo4j.test.Neo4jIntegrationTest;
+import org.springframework.transaction.annotation.EnableTransactionManagement;
+
+/**
+ * @author Michael J. Simons
+ */
+@Neo4jIntegrationTest
+public class CorrectReactiveConfigIT extends AbstractReactiveTestBase {
+
+	@Configuration
+	@EnableTransactionManagement
+	@EnableReactiveNeo4jRepositories(considerNestedRepositories = true)
+	static class Config extends AbstractReactiveTestBase.Config {
+		@Override
+		public boolean isCypher5Compatible() {
+			return AbstractReactiveTestBase.neo4jConnectionSupport.isCypher5SyntaxCompatible();
+		}
+	}
+}

src/test/java/org/springframework/data/neo4j/integration/issues/gh2728/TestEntityWithAssignedId1.java

@@ -0,0 +1,50 @@
+/*
+ * Copyright 2011-2023 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.data.neo4j.integration.issues.gh2728;
+
+import org.springframework.data.neo4j.core.schema.Id;
+import org.springframework.data.neo4j.core.schema.Node;
+import org.springframework.data.neo4j.core.schema.Property;
+import org.springframework.data.neo4j.core.schema.Relationship;
+
+/**
+ * @author Gerrit Meier
+ */
+@Node
+public class TestEntityWithAssignedId1 {
+
+    @Id
+    private String assignedId;
+
+    @Property("value_one")
+    private String valueOne;
+
+    @Relationship("related_to")
+    private TestEntityWithAssignedId2 relatedEntity;
+
+    public TestEntityWithAssignedId1(String assignedId, String valueOne, TestEntityWithAssignedId2 relatedEntity) {
+        this.assignedId = assignedId;
+        this.valueOne = valueOne;
+        this.relatedEntity = relatedEntity;
+    }
+    public String getAssignedId() {
+        return assignedId;
+    }
+
+    public TestEntityWithAssignedId2 getRelatedEntity() {
+        return relatedEntity;
+    }
+}