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Arek Stegienko Dev Trigger help: change parent object field
I'm new to writing Apex code and I need to create a trigger that runs when a task is created and have this trigger update a field in the task's parent object (in this case a lead). I learn great from examples, so if anyone has a trigger that does exactly this and is willing to post it that would be great. Or at the very least if you could let me know how I go about getting access to the parent object of the task that would help too.
Thanks.
There's some other posts that ask about this.
Check out this thread: http://boards.developerforce.com/t5/Apex-Code-Development/Trigger-to-update-Parent-record-based-on-concatenation-of-child/td-p/268871
Basically your steps are to:
Loop through all the Child records in trigger.net and build a set of Parent Record IDs
Query your Parent Records
Loop through parent records and make the change to the field
update parent records
For your situation Tasks have two "related" fields:
WhatID == this is the 'Related To' field
WhoID == this is the Contact/Lead field
Normally, The issue is knowing what sObject the WhatID belongs to. Since your situation will always be a lead you need to:
1. Loop through Trigger.new (tasks list) and Identify the tasks that are on leads
one method of doing this is to look at the WhoID of the Task. If the first 3 charactesr of the Id are '00Q' then it's a lead
2. If the WhoID of the task is a lead, Place the WHOId in a Set<Id> "ParentIDSet"
3. Query all Leads where their ID is in ParentIDSet into a list "LeadList"
4. Loop through LeadList and set the value of the field
5. updateLeadList