docs: Add another QBE example.

src/test/java/org/springframework/data/neo4j/integration/issues/IssuesIT.java

@@ -55,6 +55,7 @@ import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.ComponentScan;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.dao.DataIntegrityViolationException;
+import org.springframework.data.domain.Example;
 import org.springframework.data.domain.Page;
 import org.springframework.data.domain.PageRequest;
 import org.springframework.data.domain.Sort;
@@ -141,6 +142,9 @@ import org.springframework.data.neo4j.integration.issues.gh2639.Individual;
 import org.springframework.data.neo4j.integration.issues.gh2639.LanguageRelationship;
 import org.springframework.data.neo4j.integration.issues.gh2639.ProgrammingLanguage;
 import org.springframework.data.neo4j.integration.issues.gh2639.Sales;
+import org.springframework.data.neo4j.integration.issues.qbe.A;
+import org.springframework.data.neo4j.integration.issues.qbe.ARepository;
+import org.springframework.data.neo4j.integration.issues.qbe.B;
 import org.springframework.data.neo4j.integration.misc.ConcreteImplementationTwo;
 import org.springframework.data.neo4j.repository.config.EnableNeo4jRepositories;
 import org.springframework.data.neo4j.repository.query.QueryFragmentsAndParameters;
@@ -189,6 +193,8 @@ class IssuesIT extends TestBase {
 				setupGH2572(transaction);
 				setupGH2583(transaction);
 
+				transaction.run("CREATE (:A {name: 'A name', id: randomUUID()}) -[:HAS] ->(:B {anotherName: 'Whatever', id: randomUUID()})");
+
 				transaction.commit();
 			}
 			bookmarkCapture.seedWith(session.lastBookmarks());
@@ -266,6 +272,21 @@ class IssuesIT extends TestBase {
 		cityModelRepository.saveAll(List.of(aachen, utrecht));
 	}
 
+	@Test
+	void qbeWithRelationship(@Autowired ARepository repository) {
+
+		var probe = new A();
+		probe.setB(new B("Whatever"));
+		var optionalResult = repository.findOne(Example.of(probe));
+		assertThat(optionalResult).hasValueSatisfying(a -> {
+			assertThat(a.getName()).isEqualTo("A name");
+			assertThat(a.getId()).isNotNull();
+		});
+
+		var allResults = repository.findAll(Example.of(probe));
+		assertThat(allResults).hasSize(1);
+	}
+
 	@Test
 	@Tag("GH-2168")
 	void findByIdShouldWork(@Autowired DomainObjectRepository domainObjectRepository) {

src/test/java/org/springframework/data/neo4j/integration/issues/qbe/A.java

@@ -0,0 +1,61 @@
+/*
+ * 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.qbe;
+
+import java.util.UUID;
+
+import org.springframework.data.neo4j.core.schema.GeneratedValue;
+import org.springframework.data.neo4j.core.schema.Id;
+import org.springframework.data.neo4j.core.schema.Node;
+import org.springframework.data.neo4j.core.schema.Relationship;
+
+/**
+ * Internally reported question / issue.
+ *
+ * @author Michael Simons
+ */
+@Node
+public class A {
+
+	@Id
+	@GeneratedValue(GeneratedValue.UUIDGenerator.class)
+	UUID id;
+
+	private String name;
+
+	@Relationship(type = "HAS")
+	private B b;
+
+	public UUID getId() {
+		return id;
+	}
+
+	public String getName() {
+		return name;
+	}
+
+	public void setName(String name) {
+		this.name = name;
+	}
+
+	public B getB() {
+		return b;
+	}
+
+	public void setB(B b) {
+		this.b = b;
+	}
+}

src/test/java/org/springframework/data/neo4j/integration/issues/qbe/ARepository.java

@@ -0,0 +1,28 @@
+/*
+ * 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.qbe;
+
+import java.util.UUID;
+
+import org.springframework.data.neo4j.repository.Neo4jRepository;
+
+/**
+ * Internally reported question / issue.
+ *
+ * @author Michael Simons
+ */
+public interface ARepository extends Neo4jRepository<A, UUID> {
+}

src/test/java/org/springframework/data/neo4j/integration/issues/qbe/B.java

@@ -0,0 +1,52 @@
+/*
+ * 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.qbe;
+
+import java.util.UUID;
+
+import org.springframework.data.neo4j.core.schema.GeneratedValue;
+import org.springframework.data.neo4j.core.schema.Id;
+import org.springframework.data.neo4j.core.schema.Node;
+
+/**
+ * Internally reported question / issue.
+ *
+ * @author Michael Simons
+ */
+@Node
+public class B {
+	@Id
+	@GeneratedValue(GeneratedValue.UUIDGenerator.class)
+	UUID id;
+
+	private String anotherName;
+
+	public B(String anotherName) {
+		this.anotherName = anotherName;
+	}
+
+	public UUID getId() {
+		return id;
+	}
+
+	public String getAnotherName() {
+		return anotherName;
+	}
+
+	public void setAnotherName(String anotherName) {
+		this.anotherName = anotherName;
+	}
+}