city.rb in geopolitical-2.0.0

- old
+ new

@@ -12,10 +12,10 @@
 
   spatial_scope :geom
 
   attr_writer :x, :y, :z
 
-  belongs_to :region, inverse_of: :cities
+  belongs_to :region, inverse_of: :cities, optional: true
   belongs_to :nation, inverse_of: :cities
   has_many :hoods
 
   has_one :nation_governancy, as: :nation_capital, class_name: 'Nation'
   has_one :region_governancy, as: :region_capital, class_name: 'Region'