Inject the tables metadata into the upgrade and downgrade functions. Fix a bunch of the downgrades to actually work.

data/billing.py

@@ -3,6 +3,8 @@ import stripe
 from datetime import datetime, timedelta
 from calendar import timegm
 
+from util.collections import AttrDict
+
 PLANS = [
   # Deprecated Plans
   {
@@ -118,20 +120,6 @@ def get_plan(plan_id):
   return None
 
 
-class AttrDict(dict):
-  def __init__(self, *args, **kwargs):
-    super(AttrDict, self).__init__(*args, **kwargs)
-    self.__dict__ = self
-
-  @classmethod
-  def deep_copy(cls, attr_dict):
-    copy = AttrDict(attr_dict)
-    for key, value in copy.items():
-      if isinstance(value, AttrDict):
-        copy[key] = cls.deep_copy(value)
-    return copy
-
-
 class FakeStripe(object):
   class Customer(AttrDict):
     FAKE_PLAN = AttrDict({