#566 - Demonstrate custom query on a two entity aggregate.

Based on the discussion at https://stackoverflow.com/questions/52978700/how-to-write-a-custom-query-in-spring-data-jdbc

jdbc/basics/src/main/java/example/springdata/jdbc/basics/aggregate/LegoSet.java

@@ -19,6 +19,7 @@ import lombok.AccessLevel;
 import lombok.AllArgsConstructor;
 import lombok.Data;
 import lombok.With;
+import lombok.With;
 
 import java.time.Period;
 import java.time.temporal.ChronoUnit;

jdbc/basics/src/main/java/example/springdata/jdbc/basics/aggregate/LegoSetRepository.java

@@ -36,6 +36,16 @@ interface LegoSetRepository extends CrudRepository<LegoSet, Integer> {
 			"  WHERE :age BETWEEN l.min_age and l.max_age")
 	List<ModelReport> reportModelForAge(@Param("age") int age);
 
+	/**
+	 * See https://stackoverflow.com/questions/52978700/how-to-write-a-custom-query-in-spring-data-jdbc
+	 * @param name
+	 * @return
+	 */
+	@Query("select a.*, b.handbuch_id as manual_handbuch_id, b.author as manual_author, b.text as manual_text from lego_set a " +
+			"join handbuch b on a.id = b.handbuch_id " +
+			"where name = :name")
+	List<LegoSet> findByName(@Param("name") String name);
+
 	@Modifying
 	@Query("UPDATE model set name = lower(name) WHERE name <> lower(name)")
 	int lowerCaseMapKeys();

jdbc/basics/src/test/java/example/springdata/jdbc/basics/aggregate/AggregateTests.java

@@ -23,6 +23,7 @@ import java.time.Period;
 import java.util.Arrays;
 import java.util.List;
 
+import org.assertj.core.api.Assertions;
 import org.assertj.core.groups.Tuple;
 import org.junit.Test;
 import org.junit.runner.RunWith;
@@ -72,7 +73,6 @@ public class AggregateTests {
 		legoSets = repository.findAll();
 		Output.list(legoSets, "Manual replaced");
 		checkLegoSets(legoSets, "One last attempt: Just build a car! Ok?", 3);
-
 	}
 
 	@Test
@@ -111,6 +111,9 @@ public class AggregateTests {
 		// SUV, F1 Ferrari 2018 and Muck get updated
 		assertThat(updated).isEqualTo(3);
 
+
+		final List<LegoSet> legoSetsByName = repository.findByName("Small Car 01");
+		assertThat(legoSetsByName).hasSize(1);
 	}
 
 	private LegoSet createLegoSet(String name, int minimumAge, int maximumAge) {