diff --git a/persistence-modules/spring-boot-persistence/src/main/java/com/baeldung/exists/Car.java b/persistence-modules/spring-boot-persistence/src/main/java/com/baeldung/exists/Car.java new file mode 100644 index 0000000000..bf09caf6ff --- /dev/null +++ b/persistence-modules/spring-boot-persistence/src/main/java/com/baeldung/exists/Car.java @@ -0,0 +1,48 @@ +package com.baeldung.exists; + +import javax.persistence.Entity; +import javax.persistence.GeneratedValue; +import javax.persistence.Id; + +/** + * @author paullatzelsperger + * @since 2019-03-20 + */ +@Entity +public class Car { + + @Id + @GeneratedValue + private int id; + private Integer power; + private String model; + + Car() { + + } + + public Car(int power, String model) { + this.power = power; + this.model = model; + } + + public Integer getPower() { + return power; + } + + public void setPower(Integer power) { + this.power = power; + } + + public String getModel() { + return model; + } + + public void setModel(String model) { + this.model = model; + } + + public int getId() { + return id; + } +} diff --git a/persistence-modules/spring-boot-persistence/src/main/java/com/baeldung/exists/CarRepository.java b/persistence-modules/spring-boot-persistence/src/main/java/com/baeldung/exists/CarRepository.java new file mode 100644 index 0000000000..a54f19f4cd --- /dev/null +++ b/persistence-modules/spring-boot-persistence/src/main/java/com/baeldung/exists/CarRepository.java @@ -0,0 +1,24 @@ +package com.baeldung.exists; + +import org.springframework.data.jpa.repository.JpaRepository; +import org.springframework.data.jpa.repository.Query; +import org.springframework.data.repository.query.Param; +import org.springframework.stereotype.Repository; + +/** + * @author paullatzelsperger + * @since 2019-03-20 + */ +@Repository +public interface CarRepository extends JpaRepository { + + boolean existsCarByPower(int power); + + boolean existsCarByModel(String model); + + @Query("select case when count(c)> 0 then true else false end from Car c where c.model = :model") + boolean existsCarExactCustomQuery(@Param("model") String model); + + @Query("select case when count(c)> 0 then true else false end from Car c where lower(c.model) like lower(:model)") + boolean existsCarLikeCustomQuery(@Param("model") String model); +} diff --git a/persistence-modules/spring-boot-persistence/src/test/java/com/baeldung/exists/CarRepositoryIntegrationTest.java b/persistence-modules/spring-boot-persistence/src/test/java/com/baeldung/exists/CarRepositoryIntegrationTest.java new file mode 100644 index 0000000000..1633df35d6 --- /dev/null +++ b/persistence-modules/spring-boot-persistence/src/test/java/com/baeldung/exists/CarRepositoryIntegrationTest.java @@ -0,0 +1,86 @@ +package com.baeldung.exists; + +import static org.assertj.core.api.Assertions.assertThat; +import static org.springframework.data.domain.ExampleMatcher.GenericPropertyMatchers.ignoreCase; + +import org.junit.After; +import org.junit.Before; +import org.junit.Test; +import org.junit.runner.RunWith; +import org.springframework.beans.factory.annotation.Autowired; +import org.springframework.boot.test.context.SpringBootTest; +import org.springframework.data.domain.Example; +import org.springframework.data.domain.ExampleMatcher; +import org.springframework.test.context.junit4.SpringRunner; + +import java.util.Arrays; +import java.util.List; + +@RunWith(SpringRunner.class) +@SpringBootTest +public class CarRepositoryIntegrationTest { + + @Autowired + private CarRepository repository; + private int searchId; + + @Before + public void setup() { + List cars = repository.saveAll(Arrays.asList(new Car(200, "BMW"), new Car(300, "Audi"))); + searchId = cars.get(0).getId(); + } + + @After + public void teardown() { + repository.deleteAll(); + } + + @Test + public void whenIdIsCorrect_thenExistsShouldReturnTrue() { + assertThat(repository.existsById(searchId)).isTrue(); + } + + @Test + public void givenExample_whenExists_thenIsTrue() { + ExampleMatcher modelMatcher = ExampleMatcher.matching() + .withIgnorePaths("id") // must explicitly ignore -> PK + .withMatcher("model", ignoreCase()); + Car probe = new Car(); + probe.setModel("bmw"); + + Example example = Example.of(probe, modelMatcher); + + assertThat(repository.exists(example)).isTrue(); + } + + @Test + public void givenPower_whenExists_thenIsFalse() { + assertThat(repository.existsCarByPower(200)).isTrue(); + assertThat(repository.existsCarByPower(800)).isFalse(); + } + + @Test + public void existsByDerivedQuery_byModel() { + assertThat(repository.existsCarByModel("Audi")).isTrue(); + assertThat(repository.existsCarByModel("audi")).isFalse(); + assertThat(repository.existsCarByModel("AUDI")).isFalse(); + assertThat(repository.existsCarByModel("")).isFalse(); + } + + @Test + public void givenModelName_whenExistsExact_thenIsTrue() { + assertThat(repository.existsCarExactCustomQuery("BMW")).isTrue(); + assertThat(repository.existsCarExactCustomQuery("Bmw")).isFalse(); + assertThat(repository.existsCarExactCustomQuery("bmw")).isFalse(); + assertThat(repository.existsCarExactCustomQuery("")).isFalse(); + } + + @Test + public void givenModelName_whenExistsLike_thenIsTrue() { + assertThat(repository.existsCarLikeCustomQuery("BMW")).isTrue(); + assertThat(repository.existsCarLikeCustomQuery("Bmw")).isTrue(); + assertThat(repository.existsCarLikeCustomQuery("bmw")).isTrue(); + assertThat(repository.existsCarLikeCustomQuery("")).isFalse(); + } + +} diff --git a/spring-boot-data/pom.xml b/spring-boot-data/pom.xml index 9ef4cc69c8..8735a54e7b 100644 --- a/spring-boot-data/pom.xml +++ b/spring-boot-data/pom.xml @@ -119,4 +119,4 @@ 2.2.4 - \ No newline at end of file +