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  • valentijnnk
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SOLVED
5 replies

Simple (before delete) Trigger

Hi there,

I have two objects: (the standard) Contact and a CustomObject. The relationship between the two is a lookup-field on the Contact, named "CustomObjectID". 
I have a checkbox on the CustomObject-record; this checkbox shows whether a Custom Object has a Contact related to it.

Now, when I delete a Contact, I want the checkbox on the related Custom Object to be unchecked.

I currently use this apex trigger:

trigger CustomObjectDelete on Contact (before delete) {
for (Contact c : Trigger.old) {
c.CustomObject__r.Checkbox__c = false;
  }
}

But it gives error:  "System.NullPointerException: Attempt to de-reference a null object:"

Many many thanks in advance !

KR, Valentijn
SOLVED
5 replies

Simple (before delete) Trigger

Hi there,

I have two objects: (the standard) Contact and a CustomObject. The relationship between the two is a lookup-field on the Contact, named "CustomObjectID". 
I have a checkbox on the CustomObject-record; this checkbox shows whether a Custom Object has a Contact related to it.

Now, when I delete a Contact, I want the checkbox on the related Custom Object to be unchecked.

I currently use this apex trigger:

trigger CustomObjectDelete on Contact (before delete) {
for (Contact c : Trigger.old) {
c.CustomObject__r.Checkbox__c = false;
  }
}

But it gives error:  "System.NullPointerException: Attempt to de-reference a null object:"

Many many thanks in advance !

KR, Valentijn