I have the next issue -> I have a table on my db with a composite id...
Supose (Id1,Id2,Id3,Id4), the Id4 is generated by a sequence on the db...
My question is, in spring boot, I generate the entity 'Table1' and the corresponding 'Table1Id',
but when i want to add the corresponding GeneratedValue from the sequence, is not generating anything.
I was looking for in the internet and i found that the GeneratedValue is not working without the #Id anotation, but maybe there are some way to fix this issue.
Thank's and sorry for my english.
SOLVED:
When a composite id is required in your project, it is impossible with an embeddedId. It is necesary to use #IdClass on my compossiteId instead #EmbeddedId, because the second does not work with #GeneratedValues for example my solution was:
#Data
#Entity(name = "table_name")
#IdClass(CompositeIdTest.class)
public class TestClass implements Serializable {
#Id
#Column(name = "column", nullable = false)
private String column;
#Id
#SequenceGenerator(name = "sequence", sequenceName = "sequence", allocationSize = 1)
#GeneratedValue(generator = "sequence")
private int idGenerated;
Anyway, thank's
Related
i'm using Spring Boot 2.4.2 and Data module for JPA implementation.
Now, i'm using an Oracle View, mapped by this JPA Entity:
#Entity
#Immutable
#Table(name = "ORDER_EXPORT_V")
#ToString
#Data
#NoArgsConstructor
#EqualsAndHashCode(onlyExplicitlyIncluded = true)
public class OrderExportView implements Serializable {
private static final long serialVersionUID = -4417678438840201704L;
#Id
#Column(name = "ID", nullable = false)
#EqualsAndHashCode.Include
private Long id;
....
The view uses an UNION which allows me to obtain two different attributes of the same parent entity, so for one same parent entity (A) with this UNION I get the attribute B in row 1 and attribute C in row 2: this means that the rows will be different from each other.
If I run the query with an Oracle client, I get the result set I expect: same parent entity with 2 different rows containing the different attributes.
Now the issue: when I run the query with Spring Data (JPA), I get the wrong result set: two lines but duplicate.
In debug, I check the query that perform Spring Data and it's correct; if I run the same query, the result set is correct, but from Java/Spring Data not. Why??
Thanks for your support!
I got it! I was wrong in the ID field.
The two rows have the same parent id, which is not good for JPA, which instead expects a unique value for each line.
So, now I introduced a UUID field into the view:
sys_guid() AS uuid
and in JPA Entity:
#Id
#Column(name = "UUID", nullable = false)
#EqualsAndHashCode.Include
private UUID uuid;
#Column(name = "ID")
private Long id;
and now everything works fine, as the new field has a unique value for each row.
I'm upgrading my project to Spring Boot 2.1.18 that uses Hibernate 5.3.18.
Previously, my entity looked like thus and would use the SequenceHiLoGenerator:
#Entity
#Table(name = "group_link")
#SequenceGenerator(name = "group_link_seq", sequenceName = "group_link_seq")
public class GroupLinkEntity extends BaseObject {
#Id
#GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "group_link_seq")
#Column(name = "group_link_id", unique = true, nullable = false)
private Long id
}
Now, by default in Hibernate 5, it uses the SequenceStyleGenerator which causes constraint violations because my increment size is 1 and the default allocationSize is 50.
The suggested thing to do to maintain compatibility is to set this property:
spring.jpa.properties.hibernate.use-new-id-generator-mappings: false
I do so but it does not seem to take, because the SequenceStyleGenerator is still used. From my understanding, this should cause it to use the SequenceHiLoGenerator. Is this incorrect?
However, if I modify the entity to look like the below it works as expected, replicating the previous functionality I had.
#Entity
#Table(name = "group_link")
#GenericGenerator(
name = "group_link_seq",
strategy = "org.hibernate.id.SequenceHiLoGenerator",
parameters = {
#Parameter(name = "sequence_name", value = "group_link_seq"),
}
)
public class GroupLinkEntity extends BaseObject {
#Id
#GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "group_link_seq")
#Column(name = "group_link_id", unique = true, nullable = false)
private Long id;
}
So, it would seem the property is not being taken somehow and I'm looking to figure out why that is. I see it show up in my JpaProperties bean. If I change other properties, like my dialect, I can see that they are taking effect.
Could anyone point me to the code that actually reads that property and makes a decision on what generator to use or point out some obvious error I'm making here?
As it's stated in the documentation:
You need to ensure that names defined under spring.jpa.properties.* exactly match those expected by your JPA provider. Spring Boot will not attempt any kind of relaxed binding for these entries.
For example, if you want to configure Hibernate’s batch size you must use spring.jpa.properties.hibernate.jdbc.batch_size. If you use other forms, such as batchSize or batch-size, Hibernate will not apply the setting.
So, for your case you should use:
spring.jpa.properties.hibernate.id.new_generator_mappings: false
See also this part of hibernate documentation.
I'm working on oracle database to manage a JPA entity with a String Primary key.
I cannot modify the type on the PK to a Long or int in the database, so i want to know how to configure the pk sequence in my JPA entity,
i've tried this :
#Id
#SequenceGenerator(name="SEQ_ID", sequenceName = "SEQ_ID" )
#GeneratedValue(strategy=GenerationType.SEQUENCE, generator="SEQ_ID")
#Column(name="SEQ_ID",unique=true, nullable = false,updatable = false)
private String id;
but when persisting a new entity i got the error : Unknown integral data type for ids : java.lang.String
someone can help me please ?
Try removing #GeneratedValue and #SequenceGenerator
Also, a remark, #Id will automatically set unique=true, nullable = false,updatable = false so you can remove them from #Column.
Otherwise, you can check this article for more details about creating a custom string generator https://vladmihalcea.com/how-to-implement-a-custom-string-based-sequence-identifier-generator-with-hibernate/
consider following model:
#Entity
#Getter
#Setter
public class Person {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
#ElementCollection
#Column(name = "phone")
private List<String> phoneNumber = new LinkedList<>();
}
In front-end user should be able define order of phone numbers in this sample with drag and drop or something like that. Can you tell me what is the most effective way to handle this use case? I found solution with jpa annotation #OrderColumn which generates additional column. But I guess if I need re-order items, solution is delete all from collection and save it again with new order right? I afraid that is not very elegant solution. Can you give me your advice? Thank you.
I'm using hibernate in my spring boot application
my domain model is like this
#Entity
#Table(name = "skill")
#Cache(usage = CacheConcurrencyStrategy.NONSTRICT_READ_WRITE)
#Document(indexName = "skill")
#Audited
public class Skill implements Serializable {
private static final long serialVersionUID = 1L;
#Id
#GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "sequenceGenerator")
#SequenceGenerator(name = "sequenceGenerator")
private Long id;
}
The increment size of sequence is 50 and is working properly
but when I add Envers Audited annotation I see this error
conflicting values for 'increment size'. Found [50] and [1]
How can I resolve this conflict?
This doesn't sound like an Envers problem but a general mapping problem.
When you add an #Audited annotation, that simply informs Envers that it should inspect that particular entity mapping during Hibernate bootstrap and create the necessary audit objects to store the entity state during each transaction.
The generated Envers objects use their own sequence generators and primary key. The user defined generation strategy, sequences, etc are all ignored in the Envers object because the associated column is meant to just be a copy/pass-thru value, nothing special.
In other words, the Envers table would have a PK defined that mirrors this POJO:
#Embeddable
public class EnversSkillId implements Serializable {
#Column(name = "REV", nullable = false, updatable = false)
private Integer rev;
#Column(name = "id", nullable = false, updatable = false)
private Long id;
}
When Envers generates the audit record, it automatically uses its internal sequence generator to get the next value and assign it to EnversSkillId#rev and copies your entity's id value directly into the EnversSkillId#id property.
So as mentioned in the comments, your problem is very unlikely related to Envers.