many-to-one Questions
8
Solved
Say I have a unidirectional @ManyToOne relationship like the following:
@Entity
public class Parent implements Serializable {
@Id
@GeneratedValue
private long id;
}
@Entity
public class Child...
Perishable asked 25/8, 2011 at 21:6
8
Solved
I have 2 classes: Driver and Car. Cars table updated in separate process. What I need is to have property in Driver that allows me to read full car description and write only Id pointing to existin...
Slug asked 13/1, 2015 at 19:56
15
Solved
What is the real difference between one-to-many and many-to-one relationship? It is only reversed, kind of?
I can't find any 'good-and-easy-to-understand' tutorial about this topic other than this...
Roslynrosmarin asked 5/1, 2011 at 7:23
6
Solved
I have two tables with foreign key relations. I've tried searching on how to do it and it always leads to OneToMany & ManyToOne mapping. I have these two tables.
user_role
user
I'm tryin...
Reseda asked 20/9, 2018 at 3:5
3
I have a composite key ContractServiceLocationPK made out of three id's (contractId, locationId, serviceId) of type long in an embeddable class. The class which uses this composite key, ContractSer...
Tabitha asked 19/5, 2014 at 11:20
6
Solved
I start showing you my scenario.
This is my parent object:
@Entity
@Table(name="cart")
public class Cart implements Serializable{
@GeneratedValue(strategy=GenerationType.IDENTITY)
@Id
@Colum...
Mallorie asked 6/12, 2018 at 8:52
9
I am receiving the following Hibernate Exception:
org.hibernate.AnnotationException: @OneToOne or @ManyToOne on cz.rohan.dusps.model.Switchport.konfiguracniTemplateAccess references an unknown ent...
Hybrid asked 8/9, 2011 at 14:38
4
Solved
I am reading currently the documentation of Hibernate regarding the entity associations and I come accross a little difficulty to figure out some things. It has to do in essence with the difference...
Ezara asked 20/4, 2013 at 10:58
1
Solved
Good day.
I wish to annotate my model with information from a different table.
class CompetitionTeam(models.Model):
competition_id = models.ForeignKey('Competition', on_delete=models.CASCADE, to_f...
Guttering asked 17/11, 2020 at 6:29
9
Solved
I know this question has been asked a lot, but I read almost every one of them but non of them helped me.
I'm writing an eclipse maven project with hibernate and I'm getting this error:
org.hibern...
Prosthesis asked 19/5, 2013 at 6:18
2
Solved
I am trying to link to entities Child & Client
So I have created 2 entities :
// src/children/child.entity.ts
@Entity()
export class Child extends BaseEntity {
@PrimaryGeneratedColumn()
i...
Check asked 17/5, 2020 at 15:45
2
Solved
I'm using Hibernate 3.6.7-Final and Spring 3.0.5.
I have entity like this
@Entity
public class Foo {
@ManyToOne
private Bar bar;
}
@Entity
public class Bar {
@Column
String group;
}
How ca...
Burks asked 21/5, 2012 at 19:40
4
Solved
I have these classes:
@Entity
public class Invoice implements Serializable {
@Id
@Basic(optional = false)
private Integer number;
private BigDecimal value;
//Getters and setters
}
@Entity
...
Bridoon asked 6/1, 2015 at 13:13
6
Solved
I think I misunderstood the meaning of cascading in the context of a @ManyToOne relationship.
The case:
public class User {
@OneToMany(fetch = FetchType.EAGER)
protected Set<Address> use...
Welloiled asked 23/10, 2012 at 9:21
4
Solved
I have a many-to-one relationship that I want to be nullable:
@ManyToOne(optional = true)
@JoinColumn(name = "customer_id", nullable = true)
private Customer customer;
Unfortunately, JPA keeps s...
Revere asked 19/3, 2013 at 22:40
3
Solved
I have a table that has foreign key of another table (many to one relationship) but i want it to be nullable.
Something like this:
public class SubType() {
@Id
@GeneratedValue(generator = "sys...
Sensual asked 8/9, 2014 at 6:2
3
Solved
I have a ManyToOne relationship in one of my entities, like so:
class License {
// ...
/**
* Customer who owns the license
*
* @var \ISE\LicenseManagerBundle\Entity\Customer
* @ORM\ManyToOn...
Odilia asked 26/5, 2011 at 9:45
10
Solved
Please advice me How to remove "Create and Edit..." from many2one field.?
that item shows below in the many2one fields which I filtered with domain option.
OpenERP version 7
Gourmand asked 26/3, 2013 at 5:33
2
For each row of table A, I want to be able to add one or more rows from table B.
The Django admin has an example, the user permissions picker -- I attach a screen shot.
Each user can have any n...
Breakout asked 31/12, 2017 at 5:41
3
Solved
I have got the following Entities, an item which can has up to two categories, a primary and a secondary.
Both categories are mapped ManyToOne to the category table using a JoinColumnsOrFormulas.
T...
Chopfallen asked 5/12, 2017 at 15:7
2
Solved
I have two models:
Class One:
import javax.persistence.*;
import java.util.Set;
@Entity
public class One {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private Long id;
private String ...
Understrapper asked 22/10, 2017 at 5:23
2
Solved
I have three classes one of the names is User and this user has other classes instances. Like this;
public class User{
@OneToMany(fetch=FetchType.LAZY, cascade = CascadeType.ALL)
public List<A...
Pasteup asked 11/12, 2012 at 0:45
3
I have a Doctrine model (Assignment), which has a many-to-one relationship with another model (Region). Assignments are owned by users (with each user having only one assignment per region at a tim...
Armada asked 4/9, 2012 at 17:59
4
Solved
I have a project of converting one database to another. One of the original database columns defines the row's category. This column should be mapped to a new category in the new database.
For exa...
Scyphus asked 17/12, 2009 at 11:8
2
Solved
I have Car and Rental models conntected OneToMany relation:
@Entity
public class Rental {
private Long id;
private Car car;
private User user;
@Id
@GeneratedValue
@Column(name = "RENTAL_ID")
pub...
Envelopment asked 29/3, 2012 at 16:49
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