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Hibernate HQL Join with composite Key


Hibernate HQL Join with composite Key

By : user2955461
Date : November 22 2020, 10:40 AM
I hope this helps you . i'm having some problems trying to write a HQL query to join two entities/tables as below defined , ok
it was in fact far simplier
code :
Query q=s.createQuery("FROM CustomerDAO cust WHERE  cust.name.nome like :nome ");


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Hibernate composite keys and join (one to many)?

Hibernate composite keys and join (one to many)?


By : user2801365
Date : March 29 2020, 07:55 AM
Hope that helps Heh, I just stumbled upon and that seems to solve my problem.
Composite key join in Hibernate with JPA

Composite key join in Hibernate with JPA


By : Sagar007
Date : March 29 2020, 07:55 AM
To fix this issue After looking at the Hibernate debug showing the bind variables, it was clear it wasn't binding the right parameters in the child query (that Hibernate generates). It seemed a bit random.
Adding referencedColumnNames to the @JoinColumn annotations fixed it, though.
Hibernate Composite Key Join

Hibernate Composite Key Join


By : asees4062
Date : March 29 2020, 07:55 AM
Does that help
Associations marked as mappedBy must not define database mappings like @JoinTable or @JoinColumn
code :
@ManyToOne(cascade = {CascadeType.MERGE}, fetch = FetchType.EAGER)
    @JoinColumns({
        @JoinColumn(name = "model_id", referencedColumnName = "model_id"),
        @JoinColumn(name = "serial_id", referencedColumnName = "serial_id")})
     private Device device;
    @Entity
    @Table(name = "device_settings")
    public class DeviceSettings {

        @Id
        @GeneratedValue(strategy = GenerationType.AUTO)
        @Column(name = "device_settings_id")
        private Long id;


        @OneToMany( mappedBy = "deviceSettings", cascade = {CascadeType.MERGE}, fetch = FetchType.EAGER)
         private List<Device> devices;
}
@Entity
@Table(name = "device")
public class Device {

        @EmbeddedId
        private DeviceKey deviceKey;

        @ManyToOne
        @JoinColumn(name="device_settings_id")
        private DeviceSettings deviceSettings;
       //getters and setters
}
Join two tables with composite key in hibernate

Join two tables with composite key in hibernate


By : Măȼk Ħøṩsąiɳ
Date : March 29 2020, 07:55 AM
Any of those help You're looking for Hibernate's @ManyToMany. No need to create the join table; Hibernate will do that for you:
code :
class User {
    @Id
    Long Id
    String fistName
    String lastName

    @ManyToMany
    Collection<User> subscriptions
}
Hibernate Composite key Criteria Join

Hibernate Composite key Criteria Join


By : Iron excel
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further First, why don't you try to reduce for minimalistic example? You sample involves many entities and relationships, why not reduce it, even just for the sake of your own troubleshooting time?
Second, your code is not complete, it misses id on User and other entities. For answer purposes I'll assume that id is defined somewhere.
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