BAEL-6110: Fix Spring Data JPA Exception: No Property Found for Type (#13753)

spring-boot-modules/spring-boot-data-3/pom.xml

@@ -34,6 +34,10 @@
             <artifactId>mysql-connector-java</artifactId>
             <scope>runtime</scope>
         </dependency>
+        <dependency>
+            <groupId>com.h2database</groupId>
+            <artifactId>h2</artifactId>
+        </dependency>
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-test</artifactId>

spring-boot-modules/spring-boot-data-3/src/main/java/com/baeldung/nopropertyfound/NoPropertyFoundApplication.java

@@ -0,0 +1,13 @@
+package com.baeldung.nopropertyfound;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class NoPropertyFoundApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(NoPropertyFoundApplication.class, args);
+    }
+
+}

spring-boot-modules/spring-boot-data-3/src/main/java/com/baeldung/nopropertyfound/config/DbConfig.java

@@ -0,0 +1,20 @@
+package com.baeldung.nopropertyfound.config;
+
+import javax.sql.DataSource;
+
+import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.boot.jdbc.DataSourceBuilder;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+public class DbConfig {
+
+    @Bean
+    @ConfigurationProperties(prefix = "h2.datasource")
+    public DataSource dataSource() {
+        return DataSourceBuilder.create()
+            .build();
+    }
+
+}

spring-boot-modules/spring-boot-data-3/src/main/java/com/baeldung/nopropertyfound/model/Person.java

@@ -0,0 +1,41 @@
+package com.baeldung.nopropertyfound.model;
+
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
+import javax.persistence.Id;
+
+@Entity
+public class Person {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private int id;
+    private String firstName;
+    private String lastName;
+
+    public int getId() {
+        return id;
+    }
+
+    public void setId(int id) {
+        this.id = id;
+    }
+
+    public String getFirstName() {
+        return firstName;
+    }
+
+    public void setFirstName(String firstName) {
+        this.firstName = firstName;
+    }
+
+    public String getLastName() {
+        return lastName;
+    }
+
+    public void setLastName(String lastName) {
+        this.lastName = lastName;
+    }
+
+}

spring-boot-modules/spring-boot-data-3/src/main/java/com/baeldung/nopropertyfound/repository/PersonRepository.java

@@ -0,0 +1,15 @@
+package com.baeldung.nopropertyfound.repository;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
+
+import com.baeldung.nopropertyfound.model.Person;
+
+@Repository
+public interface PersonRepository extends JpaRepository<Person, Integer> {
+
+    // findByFirsttName will cause Spring Data to throw PropertyReferenceException
+    // Person findByFirsttName(String firstName);
+    Person findByFirstName(String firstName);
+
+}

spring-boot-modules/spring-boot-data-3/src/main/resources/application.properties

@@ -5,3 +5,8 @@ spring.datasource.password=root
 spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MySQL5Dialect
 spring.jpa.hibernate.ddl-auto=none
 spring.jpa.properties.hibernate.temp.use_jdbc_metadata_defaults=false
+
+h2.datasource.url=jdbc:h2:mem:testdb
+h2.datasource.driver-class-name=org.h2.Driver
+h2.datasource.username=sa
+h2.datasource.password=

spring-boot-modules/spring-boot-data-3/src/main/resources/data.sql

@@ -0,0 +1,3 @@
+INSERT INTO person (first_name, last_name) VALUES('Azhrioun', 'Abderrahim');
+INSERT INTO person (first_name, last_name) VALUES('Brian', 'Wheeler');
+INSERT INTO person (first_name, last_name) VALUES('Dave', 'Anderson');

spring-boot-modules/spring-boot-data-3/src/main/resources/schema.sql

@@ -0,0 +1,6 @@
+DROP TABLE IF EXISTS person;
+CREATE TABLE person(
+	id INT AUTO_INCREMENT PRIMARY KEY,
+	first_name VARCHAR(200),
+	last_name VARCHAR(200)
+)

spring-boot-modules/spring-boot-data-3/src/test/java/com/baeldung/nopropertyfound/PersonRepositoryIntegrationTest.java

@@ -0,0 +1,28 @@
+package com.baeldung.nopropertyfound;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.orm.jpa.DataJpaTest;
+
+import com.baeldung.nopropertyfound.model.Person;
+import com.baeldung.nopropertyfound.repository.PersonRepository;
+
+@DataJpaTest
+class PersonRepositoryIntegrationTest {
+
+    @Autowired
+    private PersonRepository personRepository;
+
+    @Test
+    void givenQueryMethod_whenUsingValidProperty_thenCorrect() {
+
+        Person person = personRepository.findByFirstName("Azhrioun");
+
+        assertNotNull(person);
+        assertEquals("Abderrahim", person.getLastName());
+    }
+
+}