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Heese Help With Validation Rule
I am trying to come up with a solution to prevent bad data from being saved. I am working with Contracts and I have a custom field called AdID. It's a text field and a Unique Identifier. What I want to do is prevent a user from saving a contract record if the time falls between a current one with the same AdId. For example
contract abc from 2011-04-01 to 2011-05-01 with AdId123 with contract amount $100
contract xyz from 2011-04-15 to 2011-05-01 with AdId123 with contract amount $200.
I would want a Validation Rule to prevent the saving of contract xyz since the dates overlap and contain the same AdId. I can't think of a good way to do this. Any help is greatly appreciated
You can achieve this using a trigger, possibly a before insert on Contract.
I don't think configuration alone provides any mechanism to achieve this kind of functionality.
Try something like this -
trigger DupCheck on Contract (before insert) {
List <Contract> lstC = new List <Contract> ();
Integer flag = 0;
Date currED = null, expED = null;
string strAdId = trigger.new[0].AdId__c;
expED = trigger.new[0].StartDate.addMonths(trigger.new[0].ContractTerm);
currED = expED.addDays(-1);
lstC = [ select id, ContractNumber, StartDate, EndDate, AdId__c from Contract where AdId__c = : strAdId];
for (Contract c : lstC)
{
if ( (trigger.new[0].StartDate >= c.StartDate && trigger.new[0].StartDate <= c.EndDate) || (currED >= c.StartDate && currED <= c.EndDate) )
{
flag++;
break;
}
}
if (flag != 0)
{
trigger.new[0].AdId__C.addError('This ApId already exists for overlapping duration.');
}
}