id-generation

org.hibernate.MappingException: The increment size of the sequence is set to [10] in the entity mapping while … size is [1]

由 不打扰是莪最后的温柔 提交于 2020-06-27 10:44:46
问题 We run into a problem when updating to Spring Boot 2.2 and the associated Hibernate 5.4.x. We do have the following sequence generator @Id @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "hilo_sequence_generator") @GenericGenerator( name = "hilo_sequence_generator", strategy = "...", parameters = { @Parameter(name = "sequence_name", value = "XXX_SEQUENCE"), @Parameter(name = "initial_value", value = "1"), @Parameter(name = "increment_size", value = "10"), @Parameter(name =

Modify Id generation for a Grails Plugin

由 北战南征 提交于 2020-01-05 13:49:25
问题 I am using a plugin for Grails - the Amazon S3 plugin - and the domain object provided by the plugin doesn't specify the Id Generator. I am using Postgresql and require the id genrator to be identity. I could copy the plugin in my plugins directory and mess with the domain object provided but that doesn't sound like a clean approach.Could I add the correct id generation at runtime? Or maybe there is a better way. 回答1: If you are using 1.2, you could provide a default mapping for all your GORM

How to insert a record with custom id use Spring data jdbc?

由 徘徊边缘 提交于 2019-12-23 10:18:04
问题 For Spring Data JPA, I can use annotation @GeneratedValue(strategy = GenerationType.AUTO) insert a record with custom id, but for Spring Data JDBC, how to insert a record with custom id? I had tried to insert with id, but no any exception threw, and the record is not inserted into the table. 回答1: The way to do that with Spring Data JDBC is to register a BeforeSaveEvent ApplicationListener that creates the id and sets it in the entity. @Bean public ApplicationListener<BeforeSaveEvent>

@GeneratedValue with strategy=GenerationType.AUTO generates repeated value after restart

由 ▼魔方 西西 提交于 2019-12-20 12:31:33
问题 I have a hibernate entity with an ID configured as @Id @GeneratedValue(strategy=GenerationType.AUTO) private Long id; The creation of new elements works ok in the first run. But if I restart my application and retrieve back the records, the next time I try to persist this entity, hibernate tries to use the same ID generated when the application was not restarted. I get the error below, and when running with trace option, I was able to see that the ID was being reused *Hibernate: insert into

Does the path of a Document have any bearing on the random ID auto-generated by Firestore?

由 我只是一个虾纸丫 提交于 2019-12-18 09:44:57
问题 If I want to know the (random) ID of a document before saving it to Firestore (without writing custom code), I can do the following: String id = db.collection("collection-name").document().getId(); Does it make a difference if I give "collection-name" in the code above but use that id to save the document to collection "some-other-collection" ? In other words, does the collection name (or more generally, path of the document) have any bearing on the random ID generated by Firestore? Are

native generator class in hibernate

由 懵懂的女人 提交于 2019-11-28 07:14:18
问题 I have this part of hibernate mapping xml file, and I was looking for a good example for what does native mean. <hibernate-mapping> <class name="com.hib.Task" table="tasks"> <id name="id" type="int" column="id" > <generator class="native"/> </id> I know it's something related to unique identifier property, but I would really like to have an example. Sorry for the newbie question, I'm new to hibernate and programming in general :) Thank you! 回答1: Native means Your generator will use identity

Hibernate with Oracle sequence doesn't use it

由 谁说我不能喝 提交于 2019-11-27 19:06:47
I have configured hibernate to use oracle sequence. Sequence is created with cache=20, increment=1. All works fine, hibernate persisting entities. The id value is strange: 50,51....76,201,202...209,1008,1009,5129,5130 .... If I ask for sequence value (select hibernate_sequence.nextval from dual) I get value like 2,3,4 .... If I turn on hibernate sql debug, there is time to time call "select hibernate_sequence.nextval from dual" but number assigned by hibernate to ID doesn't relay on sequence! @Id @Column(name = "ID", insertable = false, updatable = false) @SequenceGenerator(name =

Hibernate ID Generator

由 梦想的初衷 提交于 2019-11-27 04:33:55
Anyone know of some good tutorials on how to create a custom ID generator for hibernate? paxdiablo A cursory search of Google for 'hibernate custom id generator tutorial' turned up the following possibilities. I've excluded those that don't look useful and summarized the content of each. http://www.devx.com/Java/Article/30396 - covers the issues of generating an ID before the data is persisted (and hence does not yet have a business key). http://docs.jboss.org/hibernate/core/3.6/reference/en-US/html_single/#mapping-declaration - the whole document is very useful but not so much a tutorial as

Hibernate with Oracle sequence doesn't use it

由 ▼魔方 西西 提交于 2019-11-26 22:45:59
问题 I have configured hibernate to use oracle sequence. Sequence is created with cache=20, increment=1. All works fine, hibernate persisting entities. The id value is strange: 50,51....76,201,202...209,1008,1009,5129,5130 .... If I ask for sequence value (select hibernate_sequence.nextval from dual) I get value like 2,3,4 .... If I turn on hibernate sql debug, there is time to time call "select hibernate_sequence.nextval from dual" but number assigned by hibernate to ID doesn't relay on sequence!

Hibernate ID Generator

由 …衆ロ難τιáo~ 提交于 2019-11-26 11:16:42
问题 Anyone know of some good tutorials on how to create a custom ID generator for hibernate? 回答1: A cursory search of Google for 'hibernate custom id generator tutorial' turned up the following possibilities. I've excluded those that don't look useful and summarized the content of each. http://www.devx.com/Java/Article/30396 - covers the issues of generating an ID before the data is persisted (and hence does not yet have a business key). http://docs.jboss.org/hibernate/core/3.6/reference/en-US
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