Questions tagged [mappedby]
23 questions
176
votes
6 answers
What is “the inverse side of the association” in a bidirectional JPA OneToMany/ManyToOne association?
In the example section of the @OneToMany JPA annotation reference:
Example 1-59 @OneToMany - Customer Class With Generics
@Entity
public class Customer implements Serializable {
...
@OneToMany(cascade=ALL, mappedBy="customer")
public…
Behrang
- 46,888
- 25
- 118
- 160
12
votes
2 answers
MappedBy in bi-directional @ManyToMany : what is the reason
What is the reason for setting MappedBy in bidirectional many-to-many relationships?
When one table has significant amount of records, while other has a few, which side is better to put mappedBy?
Dmitry
- 727
- 1
- 8
- 34
9
votes
2 answers
How to delete a row in join table with JPA
I have the model below : an article can have some tags and a tag can be on some articles.
So it is a many-to-many relationship with 3 tables :
ARTICLE
ARTICLE_TAG
TAG
When I delete a tag, I want to delete :
the tag in TAG
all relations between…
j.2bb
- 881
- 3
- 10
- 17
3
votes
1 answer
mappedBy as the field that owns the relationship
I think I understood what the attribute mappedBy means if put in a @OneToMany field (i.e. the table representing the type of the field has a foreign key to this table that declared @OneToMany(mappedBy="...") , but I don't understand exactly its…
nbro
- 15,395
- 32
- 113
- 196
2
votes
1 answer
unable to understand mappedby
I have created two entities Customer and Customer Record.
//customer class
@OneToOne
@JoinColumn(name="CUSTREC_ID", unique=true)
CustomerRecord customerRecord;
//customer record class
@OneToOne(mappedBy="customerRecord")
Customer customer;
The…
Raja Singh
- 31
- 2
2
votes
1 answer
Doctrine command: how to display file and line where error occured
I'm new to Symfony and I'm developing an application.
I've created the YAML files to generate the PHP entities. When I run this command:
php app/console doctrine:schema:update --force
I get this…
erick
- 53
- 5
1
vote
1 answer
Caused by: org.hibernate.AnnotationException: mappedBy reference an unknown target entity property?
Caused by: org.hibernate.AnnotationException: mappedBy reference an
unknown target entity property: com.vitoria.models.Show.user_profile
in com.vitoria.models.UserProfile.show
Hi! I'm trying to develop a system that associates UserProfile types to…
vitoriac
- 79
- 1
- 1
- 7
1
vote
1 answer
symfony doctrine 2 OneToMany - association to the inverse side field error
I want to connect two entities
Dish that is in some DishCategory
Dish (category_id) with DishCategory (id)
There is an error:
The association AppBundle\Entity\Dish#categoryId refers to the inverse side field AppBundle\Entity\DishCategory#category_id…
theurgicus
- 57
- 1
- 9
1
vote
1 answer
hibernate and mappedBy: Is it possible to automatically set foreign key without setting bidirectional relationship among objects?
Welcome,
I have 2 classes: Conversation and Question. One Conversation have many questions.
Conversation.java:
package com.jcg.jpa.mappedBy;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.Collection;
import…
piotrassss
- 205
- 1
- 4
- 10
0
votes
1 answer
Fail to map by MappedSuperclass's attribute
Entities:
@Entity
@Table(name = "ITEM")
@Inheritance(strategy = InheritanceType.JOINED)
public class Item extends Base {
@OneToOne(mappedBy = "item")
protected Doc doc;
}
@MappedSuperclass
public abstract class Doc extends BaseDoc…
ghithon
- 1
- 1
0
votes
1 answer
JPA Mapping @EmbeddedId with ManyToOne relationship
so I searched for the answers for my problem on the internet but didn't find something that helped, basically a need to have a ManyToOne Relationship between two classes, of which one of them has an EmbeddedId, I'm going to leave the code here and…
Pedro Henrique
- 3
- 1
0
votes
1 answer
Hibernate self referencing ManyToMany join into single list with annotations
I´m facing a problem that is similar to Tinder´s matching logic, so I´m using that as an example.
My users can have a "match" between each other by having a common match entity with two user references.
@Data
@Entity
@Table(name =…
Marian Klühspies
- 15,824
- 16
- 93
- 136
0
votes
1 answer
Spring boot Mapping wont work : MappedBy reference an unknown target entity property
I tried to run my spring boot application and I keep getting those errors on my Console. I tried every solution that other dev posted here in StackOverflow but it doesn't solve it. I have a merchant class and Account which they are linked together.…
user7781212
0
votes
1 answer
mappedBy to many values
I have this error
mappedBy reference an unknown target entity property
I know what is the problem is that I should make the mappeby value "person" istead of person1 and person2 but the probleme is that I have 2 variable of type person…
ANASS TAHIRI
- 101
- 7
0
votes
1 answer
Hibernate @OneToOne mappedBy
I'm facing the following problem:
I have one table A and B with a foreign key to table A.
An entity has the following field:
A:
public class A{
@Column(name = "id_adres", nullable = false)
private Long idAddress;
@Id
…
Matley
- 1,953
- 4
- 35
- 73