Re: N:M relations problem/question -> unwanted deletions

[Armin Waibel]

Hi Emmanuel,

don't use a removal aware collection class in your 
collection-descriptor. Per default OJB use such a collection to detect 
all removed objects from your 1:n collection.
So try to set
collection-class="org.apache.ojb.broker.util.collections.ManageableArrayList"
in your collection-descriptor.

regards,
Armin
Emmanuel Mascarenas wrote:

I have a simple n:m relation:

user *..* rol

I brake this with a middle table

user 1..* user_rol *..1 rol

Everything is fine, the problem is when a delete a rol from the rol
user's collection, the rol it self is deleted and I want to keep it.
Here es the code on user:

  /** @ojb.collection
   *    element-class-ref="model.security.Rol"
   *    auto-retrieve="true"
   *    auto-update="true"
   *    foreignkey="user_id"
   *    remote-foreignkey="rol_id"
   *    indirection-table="user_rol"
   */
  protected Collection roles;
Here es the auto generated code on repository_user.xml

<collection-descriptor
        name="roles"
        element-class-ref="model.security.Rol"
        indirection-table="user_rol"
        auto-retrieve="true"
        auto-update="true"
        <fk-pointing-to-this-class column="user_id"/>
        <fk-pointing-to-element-class column="rol_id"/>
</collection-descriptor>
Thanks all in advance
Emmanuel



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