onActivity.trigger

trigger onActivity on Event (before insert, before update)
{
	List<Antrag__c> antraege = new List<Antrag__c>();
	for(Event e : trigger.new)
	{
		if(e.Abwesenheitsart__c == 'Krankheit' || e.Abwesenheitsart__c == 'Urlaub')
		{
			if(e.WhatId == null)
			{
				Antrag__c newAntrag = new Antrag__c();

				newAntrag.Name = 'Galina';
				//newAntrag.von__c = e.StartDateTime;
				//newAntrag.bis__c = e.EndDateTime;

				insert newAntrag;

				e.WhatId = newAntrag.id;
			}
			else
			{
				Antrag__c newAntrag = new Antrag__c(id = newAntrag.WhatId);

				newAntrag.Name = 'Galina';
				//newAntrag.von__c = e.StartDateTime;
				//newAntrag.bis__c = e.EndDateTime;

				update newAntrag;
			}
		}
	}
}