P5-6519 add exchange_rate to markets (#35)

api/models/market.py

@@ -3,6 +3,7 @@
 from api.extensions import db
 from .product import Currencies
 from sqlalchemy.orm import validates
+from sqlalchemy.ext.associationproxy import association_proxy
 
 
 class Market(db.Model):
@@ -11,8 +12,10 @@ class Market(db.Model):
     id = db.Column(db.Integer, primary_key=True)
     name = db.Column(db.String(255))
     vat = db.Column(db.Float, nullable=False)
-    currency = db.Column(db.String(3))
     price_adjustment = db.Column(db.Float, nullable=False)
+    currency = db.Column(db.String(3), db.ForeignKey("product-currencies.iso3char"))
+    _pc = db.relationship(Currencies, uselist=False)
+    exchange_rate = association_proxy("_pc", "exchange_rate", creator=lambda v: Currencies(exchange_rate=v))
 
     @validates("name")
     def validate_name(self, key, value):
@@ -25,6 +28,7 @@ class Market(db.Model):
             "price_adjustment": str(self.price_adjustment),
             "vat": str(self.vat),
             "currency": self.currency,
+            "exchange_rate": str(self.exchange_rate),
         }
 
 
@@ -70,7 +74,7 @@ class LegacyMarket(object):
         if self._exchange_rate is None:
             row = Currencies.query.filter_by(iso3char=self.currency).first()
             if row:
-                self._exchange_rate = float(row.exchange_rate)
+                self._exchange_rate = row.exchange_rate
             else:
                 self._exchange_rate = 1
         return self._exchange_rate

api/models/product.py

@@ -50,7 +50,7 @@ class Currencies(db.Model):
     __tablename__ = "product-currencies"
 
     iso3char = db.Column(db.String(3), primary_key=True)
-    exchange_rate = db.Column(db.Numeric, default=1)
+    exchange_rate = db.Column(db.Float, default=1)
 
 
 class MaterialQuery(BaseQuery):

tests/models/test_market.py

@@ -1,11 +1,10 @@
 # coding=UTF-8
 
 import unittest2
-from api.models import market
+from api.models import Market
 
 
 class TestMarket(unittest2.TestCase):
-    def test_sweden(self):
-        sweden = market.from_territory("SE")
-        self.assertEqual("sv", sweden.language)
-        self.assertEqual("SE", sweden.territory)
+    def test_exchange_rate(self):
+        market = Market(exchange_rate=0.123)
+        self.assertEqual(0.123, market.exchange_rate)