Fix country_subdivision field (pretix#25)

* fixes PostalTradeAddress
- corrects order of elements
- makes country_id required
- downgrades country_subdivision to profile BASIC

* black formatting

Author: MAKOMO

drafthorse/models/party.py

@@ -9,10 +9,10 @@ class PostalTradeAddress(Element):
     line_two = StringField(NS_RAM, "LineTwo", required=False, profile=BASIC)
     line_three = StringField(NS_RAM, "LineThree", required=False, profile=BASIC)
     city_name = StringField(NS_RAM, "CityName", required=False, profile=BASIC)
+    country_id = StringField(NS_RAM, "CountryID", required=True, profile=BASIC)
     country_subdivision = StringField(
-        NS_RAM, "CountrySubDivisionName", required=False, profile=EXTENDED
+        NS_RAM, "CountrySubDivisionName", required=False, profile=BASIC
     )
-    country_id = StringField(NS_RAM, "CountryID", required=False, profile=BASIC)
 
     class Meta:
         namespace = NS_RAM

tests/test_mininal.py

@@ -33,6 +33,9 @@ def test_readme_construction_example():
     doc.trade.settlement.currency_code = "EUR"
     doc.trade.settlement.payment_means.type_code = "ZZZ"
 
+    doc.trade.agreement.seller.address.country_id = "DE"
+    doc.trade.agreement.seller.address.country_subdivision = "Bayern"
+
     li = LineItem()
     li.document.line_id = "1"
     li.product.name = "Rainbow"