delete-on-orphan

mzoom · **Joined:** Tue Feb 03, 2004 1:49 pm **Posts:** 16

i am using the built hibernate 2.1.2.

I have a association parent-child.

class com.Parent mapping:

Code:

      

  <bag
            name="childs"
            lazy="true"
            inverse="true"
            cascade="all-delete-orphan"
        >

              <key
                  column="parent_fk"
              />

              <one-to-many
                  class="com.Child"
              />
        </bag>

and,

class com.Child mapping:

Code:

        <many-to-one
            name="parent"
            class="com.Parent"
            cascade="save-update"
            outer-join="auto"
            update="true"
            insert="true"
            column="parent_fk"
            not-null="true"
        />

Using hibernate 2.1.2 and mysql.
The java code:

Code:

... get child from database
...
Parent oldParent = child.getParent();
Parent newParent = ... from database;
oldParent.getChilds().remove(child);
newParent.getChilds().add(child);
child.setParent(newParent);
...
save the child.

The above code failed with "deleted object would be re-saved by cascade".

But, if I change the mapping from "all-delete-orphan" to "all" in com.Parent mapping.

Everything works.

Why??

emmanuel · **Posted:** Thu Apr 01, 2004 4:15 am

all-delete-orphan delete orphaned children (is removed from the association link)
So this is expected