I'm using spring jpa with hibernate and ms Sqlserver. I've an entity with an enum property with an #Enumerated(EnumType.STRING) annotation. When database schema is generated, the column filled with enum value has an int type instead of a char type.
Bean methods to set database properties:
private Properties getHibernateProperties() {
Properties properties = new Properties();
properties.setProperty("hibernate.dialect","org.hibernate.dialect.SQLServer2012Dialect");
properties.setProperty("hibernate.hbm2ddl.auto","create-drop");
properties.setProperty("ejb.naming_strategy","layer.controller.configuration.PhysicalNamingStrategyImpl");
properties.setProperty("hibernate.search.default.directory_provider","filesystem");
return properties;
}
#Bean
public LocalContainerEntityManagerFactoryBean entityManagerFactory() {
HibernateJpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();
vendorAdapter.setShowSql(Boolean.TRUE);
LocalContainerEntityManagerFactoryBean factory = new LocalContainerEntityManagerFactoryBean();
factory.setJpaVendorAdapter(vendorAdapter);
factory.setDataSource(dataSource());
factory.setPackagesToScan("layer.domain","layer.application.security.authentication.entities");
factory.setJpaProperties(getHibernateProperties());
factory.afterPropertiesSet();
return factory;
}
enum and entity:
public enum Elenco {
A,
B,
C,
D;
}
#Entity
#Table(name="elenco")
public class ElencoClass extends BaseEntity<Long> {
#Column(name="nomeECognome")
private String nome;
#Enumerated(EnumType.STRING)
#Column(columnDefinition = "varchar")
private Elenco ele;
#Id
#Column(name="id")
#GeneratedValue(strategy = GenerationType.IDENTITY)
#Override
protected Long getId() {
return id;
}
#Override
protected void setId(Long id) {
super.id=id;
}
public String getNome() {
return nome;
}
public void setNome(String nome) {
this.nome = nome;
}
public Elenco getEle() {
return ele;
}
public void setEle(Elenco ele) {
this.ele = ele;
}
}
This is the table generated by spring:
CREATE TABLE [dbo].[elenco](
[id] [bigint] IDENTITY(1,1) NOT NULL,
[ele] [int] NULL,
[nome] [varchar](255) NULL,
If you can write #Enumerated(EnumType.STRING) on getter method, that will works.
Have you tried this? You still need to have #Column annotation that specify the column name but not column definition in the get method.
#Enumerated(EnumType.STRING)
#Column(name="ele")
public Elenco getEle() {...}
Use this:
#Column(name = "ele", nullable = false, columnDefinition = "enum('ELE1', 'ELE2')")
Related
I have the following test table:
CREATE TABLE user (
id UUID NOT NULL PRIMARY KEY DEFAULT uuid_generate_v4(),
name VARCHAR(100),
address jsonb
)
What I want to do is loading this table into an entity
public class Buddy{
#Id
private UUID id;
private String name;
private Address address;
//getter and setter
}
where the Address is something like
public class Address {
#JsonProperty("name")
public String name;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
Is not clear to me how can I convert my json string into a java Pojo?
is possible doing this, or is out of the scope?
With Spring Data JDBC
Sample data
-- You can't create a database table named 'user' in PostgreSQL
drop table users;
CREATE TABLE users (
id VARCHAR(10) NOT NULL PRIMARY KEY,
name VARCHAR(100),
address jsonb
);
insert into users values('1', 'Jhon Doe', '{ "name": "Main St Anytown, USA"}');
Repository
#Repository
public interface BuddyRepository extends CrudRepository<Buddy, String>{
}
You can create and register a Converter
#Configuration
#ComponentScan("com.example.demo")
public class Config extends AbstractJdbcConfiguration {
#Bean
public DataSource pgDataSource() {
DriverManagerDataSource dataSource = new DriverManagerDataSource();
dataSource.setDriverClassName("org.postgresql.Driver");
dataSource.setUrl("jdbc:postgresql://localhost:5432/db");
dataSource.setUsername("postgres");
dataSource.setPassword("postgres");
return dataSource;
}
#Bean
public JdbcCustomConversions jdbcCustomConversions() {
final List<Converter<?, ?>> converters = new ArrayList<>();
converters.add(EntityWritingConverter.INSTANCE);
converters.add(EntityReadingConverter.INSTANCE);
return new JdbcCustomConversions(converters);
}
#Bean
public JdbcTemplate jdbcTemplate(DataSource dataSource) {
return new JdbcTemplate(dataSource);
}
#WritingConverter
enum EntityWritingConverter implements Converter<Address, PGobject> {
INSTANCE;
#Override
public PGobject convert(Address source) {
ObjectMapper objectMapper = new ObjectMapper();
PGobject jsonObject = new PGobject();
jsonObject.setType("json");
try {
jsonObject.setValue(objectMapper.writeValueAsString(source));
} catch (SQLException throwables) {
throwables.printStackTrace();
} catch (JsonProcessingException e) {
e.printStackTrace();
}
return jsonObject;
}
}
#ReadingConverter
enum EntityReadingConverter implements Converter<PGobject, Address> {
INSTANCE;
#Override
public Address convert(PGobject pgObject) {
ObjectMapper objectMapper = new ObjectMapper();
String source = pgObject.getValue();
try {
return objectMapper.readValue(source, Address.class);
} catch (JsonProcessingException e) {
e.printStackTrace();
}
return null;
}
}
}
Run
#Autowired
BuddyRepository repository;
#Override
public void run(String... arg0) throws Exception {
Optional<Buddy> pojo = repository.findById("1");
System.out.println(pojo.get().id);
System.out.println(pojo.get().address.getName());
}
Results
1 Main St Anytown, USA
With JPA and Hibernate
Try this way
Maven dependency
<dependency>
<groupId>io.hypersistence</groupId>
<artifactId>hypersistence-utils-hibernate-55</artifactId>
<version>${hypersistence-utils.version}</version>
</dependency>
Or Gradle dependency
compile group: 'io.hypersistence', name: 'hypersistence-utils-hibernate-55', version: '3.0.1'
--
import io.hypersistence.utils.hibernate.type.json.JsonBinaryType
import org.hibernate.annotations.TypeDef
#TypeDef(name = "jsonb", typeClass = JsonBinaryType.class)
public class Buddy{
#Id
private UUID id;
private String name;
#Type(type = "jsonb")
#Column(columnDefinition = "jsonb")
private Address address;
//getter and setter
}
#JsonInclude(JsonInclude.Include.NON_NULL)
public class Address {
#JsonProperty("name")
public String name;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
I am working with legacy database in which db tables has no keys. For java Sake i have to used Id annotation. My goal is to read data from .dat file and insert it into table. I'm using spring batch for the above said purpose. To improve the performance threading is used. But i'm getting insertion/updation issue that i'm unable to figure out. I have referenced many sources but none seems to solve my purpose. Kindly help me out by giving some appropriate solution or reference. Thanks in advance...
Entity.java
#Entity
#Table(name = "int_repl_mkt_val")
public class IntReplMktVal implements Serializable {
private static final long serialVersionUID = 1L;
#EmbeddedId
private IntReplMktValId id;
#Column(name = "acct_sys_cd")
private String acctSysCd;
#Column(name = "co_num", nullable = false)
private Integer coNum;
#Column(name = "last_mod_tmstmp")
#Temporal(TemporalType.TIMESTAMP)
private Date lastModTmstmp;
#Column(name = "pim_owned", nullable = false)
private String pimOwned;
#Column(name = "position", nullable = false)
private BigDecimal position;
#Column(name = "pricing_plan")
private String pricingPlan;
#Column(name="source_system",nullable=false)
private String sourceSystem;
... getter and setter
}
EmbeddedClass.java
#Embeddable
public class IntReplMktValId implements Serializable
{
private static final long serialVersionUID = 4824041485763129937L;
#Column(name = "acct_id",nullable=false)
private Integer acctId;
#Column(name = "asset_id",nullable=false)
private Integer assetId;
... getter and setter
}
jpaRepository.class
#Repository
public interface IntReplMktValRepository extends JpaRepository<IntReplMktVal, IntReplMktValId>
{
}
BatchConfiguration.class
#Configuration
public class IMAPPositionBatchConfiguration
{
#Autowired
JobBuilderFactory jobBuilderFactory;
#Autowired
StepBuilderFactory stepBuilderFactory;
#StepScope
#Bean(name="imapPositionReader")
public FlatFileItemReader<IMAPPositionInputMapperDTO> reader(#Value("#{jobParameters['fileName']}") String fileName) throws IOException
{
FlatFileItemReader<IMAPPositionInputMapperDTO> newBean = new FlatFileItemReader<>();
newBean.setName("fileReader");
newBean.setResource(new InputStreamResource(FileUtils.openInputStream(new File(fileName))));
newBean.setLineMapper(this.lineMapper());
newBean.setLinesToSkip(1);
return newBean;
}
public DefaultLineMapper<IMAPPositionInputMapperDTO> lineMapper()
{
DefaultLineMapper<IMAPPositionInputMapperDTO> lineMapper = new DefaultLineMapper<>();
lineMapper.setLineTokenizer(this.lineTokenizer());
IMAPPositionReader imapPositionReader = new IMAPPositionReader();
lineMapper.setFieldSetMapper(imapPositionReader);
return lineMapper;
}
public DelimitedLineTokenizer lineTokenizer()
{
DelimitedLineTokenizer tokenizer = new DelimitedLineTokenizer();
tokenizer.setDelimiter("|");
tokenizer.setNames("field1","field2","field3");
tokenizer.setIncludedFields(5,4,7);
return tokenizer;
}
public ItemProcessor<IMAPPositionInputMapperDTO, IntReplMktVal> processor()
{
return new IMAPPositionProcessor();
}
#Bean(name="imapPositionBatchWriter")
public ItemWriter<IntReplMktVal> writer()
{
return new IMAPPositionWriter();
}
#Bean(name="imapPositionListener")
public JobExecutionListenerSupport jobCompletionListener()
{
return new IMAPPositionJobListener();
}
#Bean(name="imapPositionTaskExecutor")
public ThreadPoolTaskExecutor taskExecutor()
{
ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
executor.setCorePoolSize(50);
executor.setMaxPoolSize(100);
return executor;
}
#Bean(name="imapPositionStep")
public Step step(#Autowired #Qualifier("imapPositionTaskExecutor")TaskExecutor taskExecutor) throws IOException
{
return stepBuilderFactory.get("imapPositionStep")
.<IMAPPositionInputMapperDTO, IntReplMktVal>chunk(100)
.reader(this.reader(null))
.processor(this.processor())
.writer(this.writer())
.taskExecutor(taskExecutor)
.build();
}
#Bean(name="imapPositionFileImportJob")
public Job importUserJob(#Autowired #Qualifier("imapPositionStep") Step step)
{
return jobBuilderFactory
.get("imapPositionFileImportJob"+new Date())
.incrementer(new RunIdIncrementer())
.listener(this.jobCompletionListener())
.flow(step)
.end()
.build();
}
}
BatchWriter.java
public class IMAPPositionWriter implements ItemWriter<IntReplMktVal>
{
#Autowired
IntReplMktValRepository intReplMktValRepository;
#Override
public void write(List<? extends IntReplMktVal> items) throws Exception
{
intReplMktValRepository.saveAll(items);
}
}
ErrorLog
2019-06-07 17:22:01,522 ERROR [scopedTarget.imapPositionTaskExecutor-4] org.hibernate.internal.ExceptionMapperStandardImpl : HHH000346: Error during managed flush [org.hibernate.HibernateException: Duplicate identifier in table for: [com.capgroup.horizon.pricecapture.entities.IntReplMktVal#component[acctId,assetId]{assetId=274800, acctId=1}]]
NOTE: I have to insert all the data into table regardless of duplication or any other issue as keys are not defined so every data is valid.
Actually the problem was due to duplication found in persistent context which was resolved by setting the chunk size to 1.
I create a spring boot application with MySQL,JPA,Web dependencies,and manually config my database settings in .properties file of Spring boot. I passed compiling, and started application successfully, and adding one record is normal fine.
BUT, i use method 'findAll(Pageable pageable)' i got a problem, that was
Could not write JSON: failed to lazily initialize a collection of roleļ¼could not initialize proxy - no Session
I got confused, i started to debug my code, finally i found that the child collection of the result is null, and it contained an error, which is
"Exception occurred: com.sun.jdi.InvocationException occurred invoking method.."
I tried a lot to fix my code, but no use.
who can help me?
The entity relationship is a simple one to many:
TeacherInfo entity and ClassInfo entity, teacher manage multiple classes, just simple as this.
here is the enter point of my app:
#SpringBootApplication(exclude= {
DataSourceAutoConfiguration.class,
HibernateJpaAutoConfiguration.class,
DataSourceAutoConfiguration.class
})
#EnableTransactionManagement
public class OrmTestApplication {
public static void main(String[] args) {
SpringApplication.run(OrmTestApplication.class, args);
}
}
Database properties setting is here:
spring.datasource.primary.url=jdbc:mysql://localhost:3306/ormtest?useSSL=false
spring.datasource.primary.username=root
spring.datasource.primary.password=BlaNok2700
spring.datasource.primary.driver-class-name = com.mysql.jdbc.Driver
hibernate.hbm2ddl.auto = update
hibernate.show-sql = true
My Data base configure java code is here:
Configuration
#EnableJpaRepositories(basePackages = "com.lanjian.ormtest.repositories", entityManagerFactoryRef = "primaryEntityManagerFactory", transactionManagerRef = "primaryTransactionManager")
public class PrimaryDbConfig {
#Autowired
private Environment env;
#Bean
#ConfigurationProperties(prefix="spring.datasource.primary")
public DataSourceProperties primaryDataSourceProperties() {
return new DataSourceProperties();
}
#Bean
public DataSource primaryDataSource() {
DataSourceProperties dbProperty = primaryDataSourceProperties();
return DataSourceBuilder.create()
.driverClassName(dbProperty.getDriverClassName())
.url(dbProperty.getUrl())
.username(dbProperty.getUsername())
.password(dbProperty.getPassword())
.build();
}
#Bean
public LocalContainerEntityManagerFactoryBean primaryEntityManagerFactory() {
LocalContainerEntityManagerFactoryBean factory = new LocalContainerEntityManagerFactoryBean();
factory.setDataSource(primaryDataSource());
factory.setPackagesToScan("com.lanjian.ormtest.entities");
factory.setJpaVendorAdapter(new HibernateJpaVendorAdapter());
Properties jpaProperties = new Properties();
jpaProperties.put("hibernate.hbm2ddl.auto", env.getProperty("hibernate.hbm2ddl.auto"));
jpaProperties.put("hibernate.show-sql", env.getProperty("hibernate.show-sql"));
factory.setJpaProperties(jpaProperties);
return factory;
}
#Bean
public PlatformTransactionManager primaryTransactionManager() {
EntityManagerFactory factory = primaryEntityManagerFactory().getObject();
return new JpaTransactionManager(factory);
}
}
My REST controller method is here:
#Autowired
private TeacherRepository teacherRepository;
#GetMapping("/page")
public Page<TeacherInfo> page(Pageable pageable){
Page<TeacherInfo> list = teacherRepository.findAll(pageable);
return list;
}
What happened
After i started my application, and use postman send request, i got this:
got a 500 error
And i debugger my code, found this:
child collection is null
In the picture, 'classes' is a list collection, but it is null, i don't understand.
Here are the TeacherInfo entity I defined
#Entity
#Table(name = "teacher")
public class TeacherInfo {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
private String name;
private byte age;
private boolean male;
#OneToMany(cascade = CascadeType.ALL,fetch = FetchType.LAZY, mappedBy="chargedTeacher")
private List<ClassInfo> classes = new ArrayList<>();
public void initialize() {
for (ClassInfo classInfo : classes) {
classInfo.setChargedTeacher(this);
for (StudentInfo studentInfo : classInfo.getStudents()) {
studentInfo.setClassInfo(classInfo);
}
}
}
//Setters and Getters}
Here is the ClassInfo Entity i defined
#Entity
#Table(name = "class_info")
public class ClassInfo {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
private String name;
private int capacity;
#ManyToOne(fetch = FetchType.LAZY)
#JoinColumn(name = "teacher_id",nullable=false)
#JsonIgnore
private TeacherInfo chargedTeacher;
#OneToMany(cascade = CascadeType.ALL,fetch=FetchType.LAZY,mappedBy="classInfo")
private List<StudentInfo> students = new ArrayList<>();
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getCapacity() {
return capacity;
}
public void setCapacity(int capacity) {
this.capacity = capacity;
}
public TeacherInfo getChargedTeacher() {
return chargedTeacher;
}
public void setChargedTeacher(TeacherInfo chargedTeacher) {
this.chargedTeacher = chargedTeacher;
}
public List<StudentInfo> getStudents() {
return students;
}
public void setStudents(List<StudentInfo> students) {
this.students = students;
}
}
I think that the problem may come from Transactionality and JPA Fetching types.
Your repository method is being invoked not using a transaction, which implies that the transaction is on the boundaries of the method invocation (which might not be wrong). Spring returns a Page with objects but when it tries to serialize them, transaction is gone so no way to access childs.
I would suggest to put the JPA relationship as EAGER fetching, allowing all the objects to be present on the repository result when the transaction ends.
EDIT:
Answer to comments
#Bean
public PlatformTransactionManager primaryTransactionManager(EntityManagerFactory factory) {
return new JpaTransactionManager(factory);
}
Thanks, let me completely change it.
Using:
Spring Boot, Hibernate JPA
I have created a link table with a composite primary key across all 3 columns(event_attendee_link_program)
I used the JPA tools in STS IDE to generate Entities from my tables and it came up with the below code. I removed some of the columns to save space.
EventAttendee.java
#Entity
#Table(name="event_attendee")
#NamedQuery(name="EventAttendee.findAll", query="SELECT e FROM EventAttendee e")
public class EventAttendee implements Serializable {
private static final long serialVersionUID = 1L;
#Id
#Column(name="attendee_id")
private long attendeeId;
//bi-directional many-to-one association to EventAttendeeLinkProgram
#OneToMany(mappedBy="eventAttendee")
private List<EventAttendeeLinkProgram> eventAttendeeLinkPrograms;
public List<EventAttendeeLinkProgram> getEventAttendeeLinkPrograms() {
return this.eventAttendeeLinkPrograms;
}
public void setEventAttendeeLinkPrograms(List<EventAttendeeLinkProgram> eventAttendeeLinkPrograms) {
this.eventAttendeeLinkPrograms = eventAttendeeLinkPrograms;
}
public EventAttendeeLinkProgram addEventAttendeeLinkProgram(EventAttendeeLinkProgram eventAttendeeLinkProgram) {
getEventAttendeeLinkPrograms().add(eventAttendeeLinkProgram);
eventAttendeeLinkProgram.setEventAttendee(this);
return eventAttendeeLinkProgram;
}
public EventAttendeeLinkProgram removeEventAttendeeLinkProgram(EventAttendeeLinkProgram eventAttendeeLinkProgram) {
getEventAttendeeLinkPrograms().remove(eventAttendeeLinkProgram);
eventAttendeeLinkProgram.setEventAttendee(null);
return eventAttendeeLinkProgram;
}
}
EventAttendeeLinkProgram.java
#Entity
#Table(name="event_attendee_link_program")
#NamedQuery(name="EventAttendeeLinkProgram.findAll", query="SELECT e FROM EventAttendeeLinkProgram e")
public class EventAttendeeLinkProgram implements Serializable {
private static final long serialVersionUID = 1L;
#EmbeddedId
private EventAttendeeLinkProgramPK id;
//bi-directional many-to-one association to EventAttendee
#ManyToOne
#JoinColumn(name="attendee_id", insertable=false, updatable=false)
private EventAttendee eventAttendee;
//bi-directional many-to-one association to EventOptionsAttendeeType
#ManyToOne
#JoinColumn(name="attendee_type_id", insertable=false, updatable=false)
private EventOptionsAttendeeType eventOptionsAttendeeType;
//bi-directional many-to-one association to EventProgram
#ManyToOne
#JoinColumn(name="program_id", insertable=false, updatable=false)
private EventProgram eventProgram;
public EventAttendeeLinkProgram() {
}
public EventAttendeeLinkProgramPK getId() {
return this.id;
}
public void setId(EventAttendeeLinkProgramPK id) {
this.id = id;
}
public EventAttendee getEventAttendee() {
return this.eventAttendee;
}
public void setEventAttendee(EventAttendee eventAttendee) {
this.eventAttendee = eventAttendee;
}
public EventOptionsAttendeeType getEventOptionsAttendeeType() {
return this.eventOptionsAttendeeType;
}
public void setEventOptionsAttendeeType(EventOptionsAttendeeType eventOptionsAttendeeType) {
this.eventOptionsAttendeeType = eventOptionsAttendeeType;
}
public EventProgram getEventProgram() {
return this.eventProgram;
}
public void setEventProgram(EventProgram eventProgram) {
this.eventProgram = eventProgram;
}
}
EventAttendeeLinkProgramPK.java
#Embeddable
public class EventAttendeeLinkProgramPK implements Serializable {
//default serial version id, required for serializable classes.
private static final long serialVersionUID = 1L;
#Column(name="attendee_id", insertable=false, updatable=false)
private int attendeeId;
#Column(name="attendee_type_id", insertable=false, updatable=false)
private int attendeeTypeId;
#Column(name="program_id", insertable=false, updatable=false)
private int programId;
public EventAttendeeLinkProgramPK() {
}
public int getAttendeeId() {
return this.attendeeId;
}
public void setAttendeeId(int attendeeId) {
this.attendeeId = attendeeId;
}
public int getAttendeeTypeId() {
return this.attendeeTypeId;
}
public void setAttendeeTypeId(int attendeeTypeId) {
this.attendeeTypeId = attendeeTypeId;
}
public int getProgramId() {
return this.programId;
}
public void setProgramId(int programId) {
this.programId = programId;
}
public boolean equals(Object other) {
if (this == other) {
return true;
}
if (!(other instanceof EventAttendeeLinkProgramPK)) {
return false;
}
EventAttendeeLinkProgramPK castOther = (EventAttendeeLinkProgramPK)other;
return
(this.attendeeId == castOther.attendeeId)
&& (this.attendeeTypeId == castOther.attendeeTypeId)
&& (this.programId == castOther.programId);
}
public int hashCode() {
final int prime = 31;
int hash = 17;
hash = hash * prime + this.attendeeId;
hash = hash * prime + this.attendeeTypeId;
hash = hash * prime + this.programId;
return hash;
}
}
EventAttendeeServiceImpl.java
#Service
#Primary
public class EventAttendeeServiceImpl implements EventAttendeeService {
#Autowired
private EventAttendeeRepository eventAttendeeRepository;
#Autowired
private EventOptionsAttendeeTypeRepository eventOptionsAttendeeTypeRepository;
#Autowired
private EventProgramRepository eventProgramRepository;
#Override
#Transactional
public String addEventAttendee(EventAttendee eventAttendee) {
EventAttendeeLinkProgram ep = new EventAttendeeLinkProgram();
ep.setEventOptionsAttendeeType(eventOptionsAttendeeTypeRepository.findOne(2L));
ep.setEventProgram(eventProgramRepository.findOne(2L));
eventAttendee.setEventAttendeeLinkPrograms(new ArrayList<>());
eventAttendee.getEventAttendeeLinkPrograms().add(ep);
eventAttendeeRepository.save(eventAttendee);
return "";
}
With this in place, my code is not throwing any errors. It is saving the EventAttendee, but nothing is being saved to the EventAttendeeLinkProgram. Please Note: I am trying so save both EventAttendee and EventAttendeeLinkProgram entities. So I think hibernate should be smart enought to forst save EventAttendee and generating the Id for it, then use that Id to store in EventAttendeeLinkProgram.
Why don't you let spring do the heavy lifting:
First create a JPA repository in spring:
public interface UserRepository extends CrudRepository<User, Long>{
}
Then create your 2 entities with the relationship
#Entity
public class User {
#Id
#GeneratedValue(strategy=GenerationType.AUTO)
private Long id;
#Column(name = "name")
private String name;
#OneToMany(cascade = CascadeType.ALL, mappedBy = "user", orphanRemoval = true, fetch = FetchType.EAGER)
private List<UserType> userTypes;
And :
#Entity
public class UserType {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
private Long id;
#ManyToOne(fetch = FetchType.EAGER)
#JoinColumn(name = "user_id")
private User user;
My test looks like this:
#RunWith(SpringRunner.class)
#SpringBootTest(classes = Application.class)
public class UserRepositoryTest extends AbstractTest {
#Autowired
private UserRepository userRepository;
#Test
#Transactional
public void test1() throws SQLException {
showTables();
User user1 = makeUser("Greg");
userRepository.save(user1);
System.out.println(user1);
userRepository.save(makeUser("George"));
assertEquals(2, userRepository.count());
User user = userRepository.findOne(1l);
}
User makeUser(String name) {
User user = new User();
user.setName(name);
user.setUserTypes(new ArrayList<>());
user.getUserTypes().add(makeUserType("admin"));
user.getUserTypes().add(makeUserType("head chef"));
return user;
}
UserType makeUserType(String description) {
UserType userType = new UserType();
userType.setDescription(description);
return userType;
}
}
First of all, user save return the identifier directly
Long insertId = (Long) session.save(user);
Then you'd better call the rollback on the txtransaction itself instead of retrieving again the transaction from the session.
Finally, when using spring you should consider to let spring manage the transaction itself (container managed transaction)using #Transactional annotation instead of using user managed transaction. It's logical as you let spring manage the session for you (sessionFactory.getCurrentSession()) and both session and transaction should have the same scope (e.g. the unit of work).
Consider reading some literature on Session (e.g. JPA entityManager) and transaction management.
I am trying to use Set in hibernate. The problem I don't know to how to write annotation on the Set table.
#Entity
#Table(name="user_settings")
public class UserSettings {
#Id
#GeneratedValue
private int id;
private int userid;
protected Set<Integer>foreignLanguageId;
public UserSettings() {
}
public UserSettings(int userid, int nativeLanguageId,
Set<Integer> foreignLanguageId, Date birthday) {
this.userid = userid;
this.nativeLanguageId = nativeLanguageId;
this.foreignLanguageId = foreignLanguageId;
this.birthday = birthday;
}
#OneToMany
#JoinColumn(name="userid", nullable=false)// This annotation
public Set<Integer> getForeignLanguageId() {
return foreignLanguageId;
}
Error:
org.hibernate.MappingException: Could not determine type for: java.util.Set, at table: user_settings, for columns: [org.hibernate.mapping.Column(foreignLanguageId)]
at org.hibernate.mapping.SimpleValue.getType(SimpleValue.java:314)...........
You should to use entity to make an association not id
#Entity
#Table(name="user_settings")
public class UserSettings {
private Set<Language> foreignLanguages;
#OneToMany
#JoinColumn(name="fk_user_setting", nullable = false)
public Set<Language> getForeignLanguages() {
return foreignLanguages;
}
}
if you want to use Integer you can use #ElementCollection
#Entity
#Table(name="user_settings")
public class UserSettings {
private Set<Integer> foreignLanguages;
#ElementCollection
public Set<Integer> getForeignLanguages() {
return foreignLanguages;
}
}