I have a "document" field that needs to be a primary key and must be unique, but every time I do a POST with the same document it updates the document and doesn't send a BAD_REQUEST
My entity:
#Entity
#Data
#NoArgsConstructor
#AllArgsConstructor
#Table(uniqueConstraints={#UniqueConstraint(columnNames={"document"})})
public class Cliente {
#Id
#Column(unique=true, updatable = false)
#NotBlank #NotNull
private String document;
#NotBlank
private String name;
#NotNull
private LocalDateTime date;
}
When I try to make a new POST with the same document it just updates what is saved in the database.
"Hibernate: update client set date=?, name=? where document=?"
The problem is that Spring Data JPA, when you call Repository#save, assumes that you want to update an existing entity when the passed in entity object has the id attribute set. You will have to inject a EntityManager in your code and instead call EntityManager#persist if you want to make sure that Hibernate tries to do an insert, in which case you'd get a constraint violation exception, just as you expect.
Related
I am using a entity class for mixing two/three table columns in one entity to hold an outcome of SYS_REFCURSOR in oracle
This allows me to have single class which is not mapped to any table but it still is an Entity
#Data
#Entity
#NoArgsConstructor
class EmployeeDetails {
#Id
#Column("emp_id")
String empId;
#Column("job_name")
String jobName;
#Column("dept_name")
String deptName;
//Future requirement
//String updatedBy
}
Now I have an additional requirement, to add who last modified the employee table, I don't want modify the procedure now, the procedure is being re-used in another background procedure and batch jobs.
My question is, is it possible to use #ManyToOne on this class which is obviously not mapped to any table
If not how do avoid manually looping a child array list, is there a ready made option in JPA or spring boot to achieve that.
Or what will be the smartest/recommended way to bring the below Entity into this class
#Data
#Entity
#NoArgsConstructor
#Table(name="app_users")
class AppUsers {
#Id
#Column(name="user_id")
String userId;
#Column
String userName;
}
#Transient, check how this annotation works it will resolve the issue, you need to understand working of #Transient
My spring boot 2.6.2 EntityManager code is as follows
q = em.createStoredProcedureQuery("MY_PROC",EmployeeDetails.class);
q.registerStoredProcedureParameter("OUT_REFC", void.class, ParameterMode.REF_CURSOR);
q.execute();
q.getResultList()
I have modified my class EmployeeDetails as below
#Data
#Entity
#NoArgsConstructor
class EmployeeDetails {
#Id
#Column("emp_id")
String empId;
#Column("job_name")
String jobName;
#Column("dept_name")
String deptName;
#OneToOne
#JoinColumn(
name="user_id",
referencedColumnName="emp_id",
insertable=false,
updatable=false,
nullable=true
)
AppUsers updatedBy;
}
The log prints Hibernate two times one after one as below, first it calls the proc and then it calls the select query, so, I did not wrote that SQL myself, the JPA layer is taking care of it
Hibernate:
{call MY_PROC(?)}
Hibernate:
select
...
...
from app_users
where user_id=?
so, my expectation achieved and I am getting the values
I am trying to create new table and join with ManyToOne relation with my existing table
below is my implementation
New table
#Entity(name="request_city_id")
#Table(uniqueConstraints={#UniqueConstraints{columnNames={"request_id","cityId"})})
#Data
#NoArgsConstructor
#FieldDefault(level=AccessLevel.PRIVATE)
public class RequestCityId{
#GenratedValue(strategy=SEQUENCE, generator="seq_req_city_id")
#SequenceGenerator(name="seq_req_city_id", allocationSize=1)
#Column(name="rc_id")
#Id
long id;
#ManyToOne
#JoinColumn(name="request_id")
Request request;
String cityId;
String status
}
Existing table
#Entity(name="request")
#Data
#NoArgsConstructor
#FieldDefault(level=AccessLevel.PRIVATE)
public class Request{
String frequency
#GenratedValue(strategy=SEQUENCE, generator="seq_req_d")
#SequenceGenerator(name="seq_req_id", allocationSize=1)
#Column(name="request_id")
#Id
long id;
#OneToMany(cascade={ PERSIST, MERGE}, mappedBy="request", fetch=EAGER)
Set<RequestCityId> requestCityIds;
}
but when I am trying to insert into my new table I see my hibernate query gets stuck and just gets timed out after sometime, I am not sure what I am doing wrong here? If I just kep cascade type MERGE then getting
Hibernate Error: a different object with the same identifier value was already associated with the session
First you should create an getters and setters method to each entity.
Request Class
Request City Id Class
this code creates the tables and also saves the data into the table.
Using #Data in entity classes in not recommended because it may cause some problems with jpa as mentioned here.
I have such a case where I need to have internally many-to-one using hibernate proxies and only id externally, here using MapsId. The issue appears when I try to save something, because the target entity is not fetched, when I set the value only on the id.
Let's take an example: I have an Account table and DeviceConfig table. Inside the DeviceConfig's class definition, I add account in a many-to-one relation and accountId in relation with #MapsId.
Now when creating, I always set a value to accountId, but never the value is picked up, and the backend throws an SQL error, because the field cannot be null.
#Table(name = "djl_device_config")
#Entity
#Getter
#Setter
#ToString
#RequiredArgsConstructor
public class DeviceConfig extends CoreEntity {
...
#JsonIgnore
#ManyToOne
#MapsId("accountId")
#JoinColumn(name = "account_id")
private Account account;
#Column(name = "account_id", insertable = false, updatable = true, nullable = true)
private UUID accountId;
}
So I suppose this is a config error on my side, but I've been reading the JPA for these three days and I still don't know what's wrong or what I should do to achieve the behaviour I expect.
That for any help you'll provide.
I have a Unit entity and I'm using the #LastModifiedDate annotation to keep track of the updates. The problem is that in case I only update the items field the updateDate field isn't updated with the new date but if I update any other fields in the Unit entity the updateDate field is updated properly.
//other annotations
#EntityListeners(AuditingEntityListener.class)
public class Unit {
#Id
#GeneratedValue
private UUID id;
private String unitId;
private String unitName;
//other fields
#LastModifiedDate
private LocalDateTime updateDate;
#OneToMany(cascade = {CascadeType.ALL, CascadeType.REFRESH})
#OrderBy("slotNumber")
private List<Item> items;
}
Unit repository
public interface UnitRepo extends CrudRepository<Unit, String> {
Set<Unit> findAllByProfileUsername(String username);
}
And my update method in my Unit service
public Unit updateUnit(Unit unit) {
return repo.save(unit);
}
#LastModifiedDate will only update the modified date when the changes have been made in the entity parameters, not the relationship. When you only modify the Item, updateDate will not be updated. You may find the open issue(for mongo) related to the same.
In case you want to modify the updateDate, you may implement the entity listeners with the #PrePersist or #PreUpdate (see JPA Lifecycle). You may also have a look into AuditorAware
You can use the callback methods in your Unit Entity class.which allows to detect the changes before / after to the entity class. #PreUodate and #PostUpdate you can try.
References -
https://docs.jboss.org/hibernate/entitymanager/3.5/reference/en/html/listeners.html
I have filled database and one entity which uses 2 tables like this:
#Entity
#Table(name="Product")
#SecondaryTable(name="B")
public class Product {
#Id
#GeneratedValue
private int idProduct;
#Column(name="name")
private String name;
#Column(table="B",name="aaaa")
private String aaa;
#Column(table="B",name="bbbb")
private String bbbb;
When I'm loading data from database table B is cleared, why?
I tried to change value in hibernate.hbm2ddl.auto from "create-drop" to "update" but I have an error like this:
"Can not set int field com.packt.webstore.domain.Product.bbbb to null value".
I need to load and write data to database so which value shoud I set and how to fix this error?
EDIT: When I set #Column(name="bbb", nullable=true) is the same error.