I'm wondering if anyone can tell me why I can't connect to http://localhost from Salesforce to a local rest interface. I've added "http://localhost" as a remote site but I still get an error when connectiong that says the connection failed. The localhost rest uri does work if I use Fiddler or via browser so why doesn't it work from Salesforce?

I'm trying a different approach for programming a trigger I need to update a lookup field called Zipcode_Lookup__c on our Account object from a previous post of mine. I used an example from pacstrats. Here is my code:

trigger ZipcodeLookup on Account (before insert, before update) {
List<String> BillingPostalCodes = new List<String>();
for (Account a:Trigger.new)
{
BillingPostalCodes.add(a.BillingPostalCode);
}
List <Zip_Code__c> ZipCodeList = [Select Name from Zip_Code__c where Name in :BillingPostalCodes];
for (Integer i = 0; i < Trigger.new.size(); i++)
{
if (Trigger.new[i].BillingPostalCode != null)
{
Trigger.new[i].Zipcode_Lookup__c = ZipcodeList[i].Name;
}
else
{
Trigger.new[i].Zipcode_Lookup__c = null;
}
}
}

The jest of it is to populate the Zipcode_Lookup__c custom lookup field on Account with the BillingPostalCode field on Account if it is available. The lookup is to the Name field on a custom object called Zip_Code__c.

When I go to update a record (or add one) I recieve this error: ZipCodeUpdate: execution of BeforeUpdate caused by: System.StringException: Invalid id: 32403: Trigger.ZipCodeUpdate: line 12, column 1

I've received this Invalid id exception error with a simple version of this trigger also.

I would appreciate any advise as I need this lookup field populated to get around the limitations of Account Assignment rules in the Manage Territories Hierarchy.

Thank you!