Question

In SilverStripe 2.4, I was able to get ID of parent DataObject “A” in onAfterWrite() method of child dataobject “B” by

$this->AClassID

How to get “A”‘s ID in “B”‘s onAfterWrite() method ?

Note:”A” has many “B”s and “B” has one “A” (one-to-many relationship).

Sample code here for kind consideration:

http://www.sspaste.com/paste/show/507d5222878a7

Answer 1

Use if statement to make sure it is not 0 before continuing. like

if($this->ID){
 //put all your code here
}

Or

if($this->RelationName()->ID){
 //put all your code here
}

The reason is that it is called multiple times and you just need to execute when it is non-zero.