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Questions tagged [hibernate-onetomany]

Questions regarding the implementation of one to many relations using Hibernate ORM framework

281 questions
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How get Null value for child in OneToMany in Spring Boot JPA

I need to get simple List of Parent objects with null values for childs. But when i use findAll() method and then try to get child object i get LazyInitializationException: failed to lazily initialize a collection of role: ... could not initialize…
Pavel Verhoturov
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Named type [com.go_task.entity.User@5b4d25e7] did not implement BasicType nor UserType

I have 2 models. One is the User model and another is the Task model. I'm trying to obtain "one to many" bidirectional relations. But even before doing that when I'm trying to create a user from Test.java class. I'm having an exception. Named type…
Farhat Shahir
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save an object with childs in Hibernate/JPA - @OneToMany

In Hibernate I want to save an object that has a child.In parent Object I have Set of other classes that are child. The parent hase a @OneToMany relationship with the child. parent : @Entity public class TalentIdentitySetting { @OneToMany(fetch =…
Mohammad Lami
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Unable to create a table in hibernate using OneToMany and ManyToOne relationship(also unable to create Foreign Key)

This code here is simply used to determine the relation of OnetoMany and ManyToOne, I use Spring Tool suite 3.9.11 with XAMPP and Server as apache 7.5 This is first file/table customer.java package com.bean; import java.util.List; import…
Aarsh Shukla
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How to use generic types into a super class using a ManyToOne relationship with hibernate

I have one generic class using single table inheritance and other sub classes : File, the main class Folder extends File Card extends File Abstract FileLink extends File : a FileLink abstract class extending File FolderLink extends FileLink and is…
kaizokun
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How to use @ElementCollection for Set mapping?

I have 2 tables. report_id is PK. animals_in_area doesn't have a PK key. I need to check is an animal_id in the animal_report by given report_id and report_date. It seems like a simple task, but can I somehow describe a field Set adimalIds…
Diacrome
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How to tell JPA to manage dependent entities?

My model has a typical parent-children-relation which is JPA-modelled by an unidirectional @OneToMany relation: a Parent has 0..n instances of Child (i.e. a List). Trying to create and persist an Entity with one dependent Property as…
Min-Soo Pipefeet
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foreign key of previously saved data is updated as null in spring boot while saving for second time

Developing an application of shopping cart below are my entity classes.... When i save it for the first time user entity is saved properly when same request is used to save user again then previously saved foreign key is becoming null i am using…
Darshan
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wiered behavior of OneToMany relationship while using spring boot and spring data jpa

I am developint simple Crud Application in Spring Boot with Data JPA, my goal is simple where I have two Entities: Foo.java @Data // lombok annotation @Entity(name = "foos") public class Foo{ @Id @GeneratedValue(strategy =…
Logical Error
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JPA/Hibernate - delete child removes parent (from same table)

I have a class Comment (see below) with some Comment objects belonging to a parent Comment. So far, when I delete a parent Comment, the childs are also deleted (as expected), BUT the problem comes when a child is deleted because the parent is also…
txemix
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column name and inverse column name in PrimaryKeyJoinColumn

I want to give Column name and inverse column names of my join columns. However I am not sure how can I do it in case of PrimaryKeyJoinColumn. Please help. Below is the statement for PrimaryKeyJoinColumn @PrimaryKeyJoinColumn(name =…
Vipin
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Spring-Data-Jpa OneToMany query duplicate ids in the info log?

I don't understand why the ids are duplicated (id_msg, id_pers_acct), that's what's in my Springboot log : select personneco0_.id_pers_acct as id_pers_1_2_0_, … from test.person_account personacc0_ where personacc0_.id_pers_acct=? select…
L.G
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Spring JPA : Update entity with updated child entities

DB Used : Postgres with Spring jpa I have a Main Entity which has structure as follows : Parent (CascadeType.All for childs) -->Child 1 (Join column with parent here) -->Child 2 (Join column with parent here) -->Child 3 (Join column with parent…
Rohan Lopes
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Hibernate Persist Unidirectional One To Many Relationship

I have the following model: The corresponding mapping is as follows: Quote entity @Entity @Table(name="Quote") @Getter @Setter public class Quote { @Id @GeneratedValue(strategy= GenerationType.AUTO, generator="native") …
AlejoDev
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Get input from postman using one to many relation mapping? spring java

I have created two entity's. One is User and other is Location. It has one to many relation i.e one user will have multiple locations. I am able to create the user. Now I want to create a location under some user. I mapped both entity's by oneToMany…
Sid
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