Single order results even when multiple items ordered through the external API.

[kevinsheahan]

Hi.
I am using python and the WHMCS external API to develop a custom store.
I am having trouble ordering more than one item from the external API method - AddOrder.
Whenever I try to order more than one item the resulting order only ever has one item in it.
For example I tried ordering 2 domains and passed the following data into AddOrder:

{ 'addonids': [],
'addons': [],
'billingcycle': ['annually', 'annually'],
'clientid': '18',
'clientip': '81.17.253.173',
'configoptions': [],
'contactid': '18',
'customfields': [],
'dnsmanagement': [],
'domain': ['doubledomainorder1.com', 'doubledomainorder2.com'],
'domaintype': ['register', 'register'],
'emailforwarding': [],
'hostname': [],
'idprotection': [],
'nameserver1': 'ns1.blacknight.com',
'nameserver2': 'ns2.blacknight.com',
'nameserver3': 'ns3.blacknight.com',
'nameserver4': 'ns4.blacknight.com',
'nameserver5': None,
'ns1prefix': ['ns1'],
'ns2prefix': ['ns2'],
'paymentmethod': 'globalpay',
'pid': [1001, 1001],
'promocode': '',
'rootpw': ['', ''],
'serviceids': []}

This resulted in a single order for doubledomainorder2.com

I have tried using the example provided on https://developers.whmcs.com/api-reference/addorder/ with the same result.
I don't know if I am doing something incorrectly or there is a bug in the external API code.

Also, there is something I don't understand about the pid entry. It seems that domains do not have a pid (like products and services do). However, in the example on https://developers.whmcs.com/api-reference/addorder/ the pid was set to 'pid' => array(1,1) for the domain ordering.
So is the example correct? If so how do you find the pid for domains as the API call GetProducts does not return the pid for domains.
This would be useful for a mixed order of domains and say SSL certificates.

Any help would be much appreciated.