From: Kenneth Clark <kenneth.clark_at_skyetech.co.za>
Date: Mon, 5 Nov 2007 23:51:28 +0200

I am faced with quite a challenge here.

 

I have the objects ClientProfile and Subscription:

 

The ClientProfile contains a collection of Subscriptions:

______________________________________________________________________

public class ClientProfile implements Serializable {

  

  @OneToMany(mappedBy = "clientProfile", cascade={CascadeType.MERGE,
CascadeType.PERSIST})

  private List<Subscription> subscriptionCollection;

 

  public ClientProfile() {

  }

 

  public List<Subscription> getSubscriptionCollection() {

    return subscriptionCollection;

  }

 

  public void setSubscriptionCollection(List<Subscription>
subscriptionCollection) {

    this.subscriptionCollection = subscriptionCollection;

  }

}

______________________________________________________________________

 

public class Subscription implements Serializable {

  @ManyToOne

  @JoinColumn(name = "client_profile_id", referencedColumnName = "id")

  private ClientProfile clientProfile;

 

  public Subscription() {

  }

 

  public ClientProfile getClientProfile() {

    return clientProfile;

  }

 

  public void setClientProfile(ClientProfile clientProfile) {

    this.clientProfile = clientProfile;

  }

}

 

Now if I want to push this down via a webservice, everytime I try I get “A
cycle is detected in the object graph”. Now I understand why this is
happening but then I try and set the client profile inside the subscription
collection to Null (to break the graph) I am getting a constraint failure
because of the foreign key. It is as if when I set the client profile value
inside subscription it wants to perform an update.

 

Does anyone know how to get round this? How do I send this to my client app
with the clientProfile and it’s subscription list in tact?

________________

Thanks and regards

 

Kenneth Clark

Solutions Engineer

 

ShadowLogo.png

Tel: 27 11 679 3075

Mobile: 27 (0) 84 583 1348

Email: HYPERLINK
"mailto:kenneth.clark_at_skyetech.co.za"kenneth.clark_at_skyetech.co.za

Website: http://www.skyetech.co.za

 


No virus found in this outgoing message.
Checked by AVG Free Edition.
Version: 7.5.503 / Virus Database: 269.15.22/1111 - Release Date: 2007/11/05
04:36