I'm getting below error while running entities who dont have any key column in table. But I guess we cant create jpa entity without key column, so I have to set all cols as key to make it work.
In my table, there is not key and all cols are nullable. This is something I cant control
Caused by: org.hibernate.MappingException: Repeated column in mapping for entity:
com.supmarket.entity.MyTable column: dimDate
(should be mapped with insert="false" update="false")
I've below entity
#Entity
public class MyTable{
#EmbeddedId
private MyTableId
private String region;
private Date dimDate;
private String loc;
}
#Entity
public class MyTableId implements Serializable{
private String region;
private Date dimDate;
private String loc;
}
Since, I dont have any primary key col in table, so I made all cols as composite key. But while running am getting above mentioned error.
May I know please, why its happening and how it can be fixed ?
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
It should be easy. Oracle has defined "generate always" for an id column. So there is no need to add this id to the insert statement. How do i define my entity that it is handling right.
#Entity
public class Example {
#Id
#GeneratedValue // if i remove this annotation than hibernate complains that i need to set it manually
#Column(name="ID", insertable=false, updatable=false)
private Long id;
}
in the error message i see that it still tries to add the id to the query.
My work-around for the column. Add the #id to an other column and remove the id column from entity definition :-D
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 am using Hibernate for calling Stored procedure
Response returned by Stored procedure
receiverId fcmId source
1234 xyz android
45678 abc web
9876 fgh android
1234 ygh ios
Hibernet #EntityClass
#Entity
public class receieverDetails {
#Id
#Column(name="receiverId")
private String receiverUserId;
#Column(name="fcmId")
private String fcmIds;
private String source;
}
I am getting List of receiverDetails from database
if List contain duplicate receiverId as show is above response, 1st one is replacing the 4th details
Code for Binding
ProcedureCall procedureCall1 =
session.createStoredProcedureCall(Strings.StoredProcedureNames.GET_RECEIVER_INFO_OF_SPONSORED_MESSAGE,receieverDetails.class);
Output output1 = procedureCall1.getOutputs().getCurrent();
if(output1.isResultSet()) {
List<receieverDetails> receievers = ((ResultSetOutput) output1).getResultList();
}
i think this is causing by #Id annotation in the entity class, Because it is happening with same receiverIds only
Kindly Help me on this
In your code by providing the #Id annotation to the column receiverId, you are telling the code that this field is to be used as the primary key for the table.So, when fetching the data the issue occurs as there are duplicate values in the table for this column. Either you need to set the primary key correctly, or make this column as primary key in table and correct your code.
If you are using the same entity class to persist data and make column receiverId primary key then try using the below :
#Entity
public class receieverDetails {
#Id
#Column(name="receiverId",unique=true,nullable = false)
#GeneratedValue(strategy = GenerationType.AUTO)
private String receiverUserId;
#Column(name="fcmId")
private String fcmIds;
private String source;
}
unique=true in #Column is a shortcut for #UniqueConstraint(columnNames = {"receiverId"} and other particular constraints.The #GeneratedValue annotation is to configure the way of increment of the specified column(field).
or if the primary key of the table is some other field in table please correct the code to reflect the same.
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.