I have two entities, TestCase and TestCaseStep, defined as follows:
TestCase
#Entity
#Table(name = "TEST_CASE")
public class TestCase implements Serializable, TestCase
{
#Id
#Column(name = "name")
private String name;
#OneToMany(fetch = FetchType.EAGER)
#JoinTable(name = "Testcase_Step_Association", joinColumns = { #JoinColumn(name = "TC_NAME", referencedColumnName = "NAME") }, inverseJoinColumns = {
#JoinColumn(name = "STEP_NAME", referencedColumnName = "NAME") })
#OrderColumn(name = "STEP_NUMBER", nullable = false)
private List<TestCaseStep> testCaseSteps;
[...]
}
TestCaseStep
#Entity
#Table(name = "TEST_CASE_STEPS")
public class TestCaseStep implements Serializable, TestCaseStep
{
#Id
#Column(name = "name")
private String name;
[...]
}
This works fine as long as I do not try to insert the same object into the list of test case steps more than once. As soon as I try that, I get a primary key violation:
Caused by: org.h2.jdbc.JdbcSQLException: Eindeutiger Index oder Prim�rschl�ssel verletzt: "PRIMARY_KEY_9 ON PUBLIC.TESTCASE_STEP_ASSOCIATION(TC_NAME, TESTCASESTEPS_NAME) VALUES ('TESTCASE_1', 'OUT_STEP', 395)"
Unique index or primary key violation: "PRIMARY_KEY_9 ON PUBLIC.TESTCASE_STEP_ASSOCIATION(TC_NAME, TESTCASESTEPS_NAME) VALUES ('TESTCASE_1', 'OUT_STEP', 395)"; SQL statement:
INSERT INTO Testcase_Step_Association (testCaseSteps_NAME, TC_NAME, STEP_NUMBER) VALUES (?, ?, ?) [23505-191]
at org.h2.message.DbException.getJdbcSQLException(DbException.java:345)
at org.h2.message.DbException.get(DbException.java:179)
at org.h2.message.DbException.get(DbException.java:155)
at org.h2.index.BaseIndex.getDuplicateKeyException(BaseIndex.java:107)
at org.h2.mvstore.db.MVSecondaryIndex.checkUnique(MVSecondaryIndex.java:230)
at org.h2.mvstore.db.MVSecondaryIndex.add(MVSecondaryIndex.java:189)
at org.h2.mvstore.db.MVTable.addRow(MVTable.java:704)
at org.h2.command.dml.Insert.insertRows(Insert.java:156)
at org.h2.command.dml.Insert.update(Insert.java:114)
at org.h2.command.CommandContainer.update(CommandContainer.java:98)
at org.h2.command.Command.executeUpdate(Command.java:258)
at org.h2.jdbc.JdbcPreparedStatement.executeUpdateInternal(JdbcPreparedStatement.java:160)
at org.h2.jdbc.JdbcPreparedStatement.executeUpdate(JdbcPreparedStatement.java:146)
at com.sun.gjc.spi.base.PreparedStatementWrapper.executeUpdate(PreparedStatementWrapper.java:125)
at org.eclipse.persistence.internal.databaseaccess.DatabaseAccessor.executeDirectNoSelect(DatabaseAccessor.java:892)
... 193 more
I need to allow my users to repeat the same test case step multiple times. How can I accomplish this without using a separate entity to map the relationship by myself?
Instead of defining name as a primary key in both TestCase and TestCaseSteps Entity,try to define a Surrogate Key as a primary key wherein you keep the Generation Strategy of that Surrogate Key to AUTO
In this way ,you always make a new Insert when you are rerunning test cases.
Related
I am having below two entities .Instructor entity has relationship oneToMany with Vehicle entity.
public class Instructor {
#Id
#GeneratedValue(strategy = GenerationType.AUTO, generator = "native")
#GenericGenerator(name = "native", strategy = "native")
private int id;
#Version
#Column(columnDefinition = "int(11) not null default 0")
private int version = 0;
#OneToMany(mappedBy = "instructor", orphanRemoval = true, cascade = CascadeType.ALL)
private Set<Vehicle> vehicles = new HashSet<>();
.....
public class Vehicle {
#Id
#GeneratedValue(strategy = GenerationType.AUTO, generator =
"native")
#GenericGenerator(name = "native", strategy = "native")
private int id;
#ManyToOne(fetch = FetchType.LAZY)
private Student student;
#ManyToOne(fetch = FetchType.LAZY)
private Instructor instructor;
I want to fetch all instructors along with their vehicles in one query .
I have tried below four ways for doing this but i am not able to do this with test case 2 , 3 and 4 .
Test Case 1 : With JPQL join fetch clause.
#Test
#Transactional
#Rollback(false)
public void fetchTest1(){
List<Instructor> instructorsJpqlJoinFetch = em
.createQuery("select distinct i from
Instructor i join fetch i.vehicles v ",
Instructor.class)
.getResultList();
print(instructorsJpqlJoinFetch);
}
private void print(List<Instructor> instructors) {
instructors.forEach(i -> {
System.out.println("######Instructor Name : " + i.getName());
i.getVehicles().forEach(v -> {
System.out.println("######Instructor Vehicle
Number : " + v.getVehicleNumber());
});
});
Db Query gone to DB for case 1 :
select
distinct instructor0_.id as id1_2_0_,
vehicles1_.id as id1_5_1_,
instructor0_.address as address2_2_0_,
instructor0_.birth_date_time as birth_da3_2_0_,
instructor0_.birth_date_time_zone_offset as birth_da4_2_0_,
instructor0_.created_date as created_5_2_0_,
instructor0_.day_off_time as day_off_6_2_0_,
instructor0_.day_start_time as day_star7_2_0_,
instructor0_.father_name as father_n8_2_0_,
instructor0_.mother_name as mother_n9_2_0_,
instructor0_.name as name10_2_0_,
instructor0_.photo as photo11_2_0_,
instructor0_.monthly_salary as monthly12_2_0_,
instructor0_.updated_date as updated13_2_0_,
instructor0_.version as version14_2_0_,
vehicles1_.creation_date as creation2_5_1_,
vehicles1_.instructor_id as instruct8_5_1_,
vehicles1_.purchased_date_time as purchase3_5_1_,
vehicles1_.purchased_date_zone_offset as purchase4_5_1_,
vehicles1_.student_id as student_9_5_1_,
vehicles1_.updated_date as updated_5_5_1_,
vehicles1_.vechicle_type as vechicle6_5_1_,
vehicles1_.vehicle_number as vehicle_7_5_1_,
vehicles1_.instructor_id as instruct8_5_0__,
vehicles1_.id as id1_5_0__
from
instructor instructor0_
inner join
vehicle vehicles1_
on instructor0_.id=vehicles1_.instructor_id
As a result All instructors are fethched from db along with their vehicles
and after executing i.getVehicles() no query goes to db again . Which should be a correct behaviour . I am getting this behaviour with JPQL join fetch clause .
Test Case 2 : Tried same with Criteria API like below :
#Test
#Transactional
#Rollback(false)
public void fetchTest3() {
CriteriaBuilder cb = em.getCriteriaBuilder();
CriteriaQuery<Instructor> cq =
cb.createQuery(Instructor.class);
Root<Instructor> root = cq.from(Instructor.class);
root.join(Instructor_.vehicles);
List<Instructor> instructorsWithCriteria =
em.createQuery(cq.distinct(true).select(root)).
getResultList();
print(instructorsWithCriteria);
}
Db query gone to db for case 2 :
select distinct instructor0_.id as id1_2_,
instructor0_.address as address2_2_,
instructor0_.birth_date_time as birth_da3_2_,
instructor0_.birth_date_time_zone_offset as birth_da4_2_,
instructor0_.created_date as created_5_2_,
instructor0_.day_off_time as day_off_6_2_,
instructor0_.day_start_time as day_star7_2_,
instructor0_.father_name as father_n8_2_,
instructor0_.mother_name as mother_n9_2_,
instructor0_.name as name10_2_,
instructor0_.photo as photo11_2_,
instructor0_.monthly_salary as monthly12_2_,
instructor0_.updated_date as updated13_2_,
instructor0_.version as version14_2_
from
instructor instructor0_
inner join
vehicle vehicles1_
on instructor0_.id=vehicles1_.instructor_id
**As a result all instructors are fethched from db . As soon as i hit
i.getVehciles() in print method a query to get vehicles of this instructor goes to db . Same happens for all instructors one by one .
Same behaviour happens for case 3 and 4 below too .
What should be passed in select clause of case 2, 3, 4 so that vehicle columns also got selected in query ?
**
Test case 3: JPQL left join
#Test
#Transactional
#Rollback(false)
public void fetchTest2() {
List<Instructor> instructorsJpqlLeftJoin = em
.createQuery("select distinct i from Instructor i left join
i.vehicles v ", Instructor.class)
.getResultList();
print(instructorsJpqlLeftJoin);
}
Db Query to db for Case 3 :
select
distinct instructor0_.id as id1_2_,
instructor0_.address as address2_2_,
instructor0_.birth_date_time as birth_da3_2_,
instructor0_.birth_date_time_zone_offset as birth_da4_2_,
instructor0_.created_date as created_5_2_,
instructor0_.day_off_time as day_off_6_2_,
instructor0_.day_start_time as day_star7_2_,
instructor0_.father_name as father_n8_2_,
instructor0_.mother_name as mother_n9_2_,
instructor0_.name as name10_2_,
instructor0_.photo as photo11_2_,
instructor0_.monthly_salary as monthly12_2_,
instructor0_.updated_date as updated13_2_,
instructor0_.version as version14_2_
from
instructor instructor0_
left outer join
vehicle vehicles1_
on instructor0_.id=vehicles1_.instructor_id
Case 4 : Criteria API Left Join :
#Test
#Transactional
#Rollback(false)
public void fetchTest4() {
CriteriaBuilder cbLeftJoin = em.getCriteriaBuilder();
CriteriaQuery<Instructor> cqLeftJoin =
cbLeftJoin.createQuery(Instructor.class);
Root<Instructor> rootLeftJoin = cqLeftJoin.from(Instructor.class);
rootLeftJoin.join(Instructor_.vehicles, JoinType.LEFT);
List<Instructor> instructorsWithCriteriaLeftJoin = em
.createQuery(cqLeftJoin.distinct(true).
select(rootLeftJoin)).getResultList();
print(instructorsWithCriteriaLeftJoin);
}
Db Query for case 4 :
select
distinct instructor0_.id as id1_2_,
instructor0_.address as address2_2_,
instructor0_.birth_date_time as birth_da3_2_,
instructor0_.birth_date_time_zone_offset as birth_da4_2_,
instructor0_.created_date as created_5_2_,
instructor0_.day_off_time as day_off_6_2_,
instructor0_.day_start_time as day_star7_2_,
instructor0_.father_name as father_n8_2_,
instructor0_.mother_name as mother_n9_2_,
instructor0_.name as name10_2_,
instructor0_.photo as photo11_2_,
instructor0_.monthly_salary as monthly12_2_,
instructor0_.updated_date as updated13_2_,
instructor0_.version as version14_2_
from
instructor instructor0_
left outer join
vehicle vehicles1_
on instructor0_.id=vehicles1_.instructor_id
What should i do in case 2,3,4 so that vehicles columns also got selected in the same query so that no secondory selects go to db?
I am using embedded glassfish (3.1.2.2) with junit (4.11), with JDK 1.7, though my source and target is set to 1.6 (maven-compiler-plugin configuration).
Following is my code:
Person.java
#Entity
public class Person implements Serializable {
private static final long serialVersionUID = 81398385247591972L;
#Id
#GeneratedValue
private Long id;
#Version
private Long version;
#Column(length = 15, nullable = false, unique = true, updatable = false)
private String username;
#Column(length = 50)
private String status;
// Constructors
// getters/setters
// hashCode, equals, toString
}
Service.java
#Stateless
public class Service {
#PersistenceContext(unitName = "ExamplePU", type = PersistenceContextType.TRANSACTION)
private EntityManager em;
public Person add(Person person) {
em.persist(person);
return person;
}
public Person find(Long id) {
return em.find(Person.class, id);
}
public Person modify(Person person) {
return em.merge(person);
}
// some more code ...
}
ServiceTest.java
public class ServiceTest {
private static EJBContainer ejbContainer;
private static Service service;
// #BeforeClass, #AfterClass, #Before, #After
#Test
public void testMerge() {
Person person;
/* Step 1 */person = service.add(new Person("username", "status"));
print("Added : " + person);
person.setStatus("Away");
/* Step 2 */person = service.modify(person);
print("Merged (status change) : " + person);
person.setUsername("UsErNaMe");
/* Step 3 */person = service.modify(person);
print("Merged (username change) : " + person);
}
// Some more tests
}
Step 1 generates following SQL (as expected):
INSERT INTO PERSON (ID, STATUS, USERNAME, VERSION) VALUES (?, ?, ?, ?)
bind => [1, status, username, 1]
Step 2 generates following SQL (as expected):
UPDATE PERSON SET STATUS = ?, VERSION = ? WHERE ((ID = ?) AND (VERSION = ?))
bind => [Away, 2, 1, 1]
Step 3 does not generate any SQL, but it does not throw any exception, which I am expecting, as the 'username' is annotated as #Column(..., updatable = false). The print(...) method prints following output:
Merged (username change) : Person [id=1, version=2, username=UsErNaMe, status=Away]
This time the merge() operation has updated username, but not version. Also, now the database is out-of-sync with EntityManager cache.
Is this expected, or bug in EclipseLink?
UPDATE
Expected result is exception at Step 3 above.
UPDATE
Have filed bug here.
You marked the column as non-updatable, and EclipseLink detects that the only change made to the person you tell it to merge is the user name. But the user name must not be updated. So it doesn't issue any SQL update query.
If you mark a column as non-updatable, you shouldn't update it.
So, to make things clear, the behavior you observe is the expected behavior.
In Vaadin 7, I'm trying to bind my ComboBox of phone numbers to a list of POJO nested in a POJO.
For exemple: I have PersonVo that contains a List phones; and PersonCommunicationVo contains the value of the phone number.
What I used for binding the others properties of PersonVo is:
BeanFieldGroup<PersonVo>personBinder = new BeanFieldGroup<PersonVo>(PersonVo.class);
personBinder.setItemDataSource(person);
myFormLayout.addComponent(personBinder.buildAndBind("Firstname", "firstName"));
myFormLayout.addComponent(personBinder.buildAndBind("Country", "country.name"));
Here PersonVo:
#Table(name = "CONTACT.T_PERSON")
#Entity
#Audited
public class PersonVo {
#Id
#GeneratedValue(strategy=GenerationType.AUTO)
#Column(name="id",updatable = false)
private Long personId;
#Column(name = "FIRSTNAME")
private String firstName;
#Column(name = "LASTNAME")
private String lastName;
#Column(name = "TITLE")
private String title;
...
#OneToMany(fetch = FetchType.LAZY, mappedBy = "personId")
#AuditMappedBy(mappedBy = "personId")
private List<PersonCommunicationVo> **phoneNumbers**;
...
and PersonCommunicationVo:
#Entity
#Table(name = "CONTACT.PERSON_COMMUNICATION")
#Audited
public class PersonCommunicationVo {
#Id
#GeneratedValue(strategy=GenerationType.AUTO)
#Column(name="id",updatable = false)
private Long persCommId;
#Column(name = "PERSON_ID")
private Long personId;
#ManyToOne
#JoinColumn(name = "COM_TYPE_ID")
private CommunicationTypesVo communicationType;
#Column(name = "VALUE")
private String **value**;
And what I would like to do is to bind my combobox of phone number to the list phoneNumbers from PersonVo based on the value from PersonCommunicationVo.
But the difficulty is to reach the right PersonCommunicationVo in the list base on what has been selected in the combobox. For exemple: I have selected the phone number +32 123 456 789 in the combobox and this value should be map to the phoneNumbers.get(indexOfSelectedItem).getValue().
In order to update the phone number, add a new one etc...
Thanks for the help!
maybe i didnt understand your datamodel, if so, could you please post PersonVo, PhoneVo(?) and PersonCommunicationVo and explain it a little further why you want to save it like you do. why does your personvo contain a List of phones? i've never worked with a beanfieldgroup before, but i think of something like:
ComboBox cb = new ComboBox("Phones", person.getPhones())
personBinder.bind(cb, "phones");
myFormLayout.addComponent(cb);
You can try something like this (java 1.7 syntax and Vaadin7):
...
FieldGroup fGroup = new FieldGroup( new BeanItem<PersonVo> (personInstance) );
...
BeanItemContainer<PersonCommunicationVo> numbers = new BeanItemContainer<>( PersonCommunicationVo.class );
numbers.addAll( personInstance.getPhoneNumbers() );
ComboBox phoneCombo = new ComboBox( "Phone Numbers", numbers );
phoneCombo.setItemCaptionMode( ItemCaptionMode.PROPERTY );
phoneCombo.setItemCaptionPropertyId( "**value**" );
fGroup.bind (phoneCombo, "**phoneNumbers**")
myFormLayout.addComponent(phoneCombo);
...
I have an error with my entities, my tables are:
LANGUAGE
codLanguage (Primary Key)
nameLanguage
Device
idDevice(Primary Key) nameDevice
PHRASE
idPhraseGroup(Primary Key) codlanguage(Primary Key) idDevice
(Primary Key) tex
I have problem with my entity Phrase,it is :
public class Phrase implements Serializable {
#EmbeddedId
private PhraseKey idPhrase;
private String text;
//etc
//here my problem (*)
#OneToMany(mappedBy="idPhrase.idPhraseGroup",fetch=FetchType.EAGER)
#JoinColumn(name = "idPhrase.idPhraseGroup", updatable = false, insertable = false, referencedColumnName = "idPhrase.idPhraseGroup")
private List<Phrase> groupListPhrase;
}
#Embeddable
public class PhraseKey implements Serializable {
private Integer idPhraseGroup;
private String codLanguage;
private String idDevice;
---getter e setter
}
I would you like to get a list of phrases with the same idPhraseGroup
for example in Phrase table :
idPhraseGroup | codLang |idDevice | text
1 | ES | 1 | mesa
1 | EN | 1 | table
..but i've got this error:
Exception Description: An incompatible mapping has been encountered
This usually occurs when the cardinality of a mapping does not
correspond with the cardinality of its backpointer
Thanxs
I do not see why you need the mapping, or how it can work. You cannot use the basic mapping "idPhrase.idPhraseGroup" field in the mappedBy on a oneToMany because it does not describe a relationship. A oneToMany generally relies on the other side having a manyToOne back, but in this case you dont.
If all you want is a collection of Phrase entities with a particular idPhaseGroup, just query for it using:
em.createQuery("select p from Phase p where p.idPhrase.idPhraseGroup = :phaseGroup").setParameter("phaseGroup", phaseGroupId);
I would remove the mapping unless you really need it cached within the Phaze entity. If you do, it would be better mapped like:
#OneToMany
#JoinColumn(name="IDPHASEGROUP", referencedColumnName="IDPHASEGROUP", insertable=false, updatable=false)
private List groupListPhrase;
I have a query that I have been trying to turn into a CriteraQuery, but I don't get how to code the "IN" term of the query.
The JPA Query that works looks like this:
#NamedQuery(name = "User.fromSearchID",
query = "SELECT q FROM User q,"
+ " IN (q.data) AS s WHERE s.data LIKE :search"
+ " ORDER BY q.id")
And the entity that it works on looks like this:
#Entity
public class User {
#Id private Integer id;
#OneToMany private List<UserData> data;
... }
And the referenced entity is
#Entity
public class UserData {
#Id private Long id;
private String key;
private String data;
... }
The intended result (the NamedQuery works) is to pull out all User entities that have some match in their list of data attributes. For some reason the CriteraQuery syntax escapes my intuition. Any help?
I assume users should be unique?
Then JP QL version without rather old fashion IN is:
String searchArgument = "data1";
String query = " SELECT DISTINCT(u) " +
" FROM User u JOIN u.data ud " +
" WHERE ud.data LIKE :search ORDER BY u.id";
List<User> result =em.createQuery(query, User.class).
setParameter("search", searchArgument).getResultList();
And same via Criteria API:
String searchArgument = "data1";
CriteriaBuilder cb = em.getCriteriaBuilder();
CriteriaQuery<User> cq = cb.createQuery(User.class);
Root<User> user = cq.from(User.class);
Predicate dataLike = cb.like(user.join("data").<String>get("data"),
cb.parameter(String.class, "search"));
cq.distinct(true).select(user)
.where(dataLike)
.orderBy(cb.asc(user.get("id")));
TypedQuery<User> findUniqueUserByUserDataData = em.createQuery(cq);
findUniqueUserByUserDataData.setParameter("search", searchArgument);