Improve display of offer price

coin/offers/models.py

@@ -49,11 +49,25 @@ class Offer(models.Model):
         return self.configuration_type
     get_configuration_type_display.short_description = 'type de configuration'
 
+    def display_price(self):
+        """Displays the price of an offer in a human-readable manner
+        (for instance "30€ / month")
+        """
+        if int(self.period_fees) == self.period_fees:
+            fee = int(self.period_fees)
+        else:
+            fee = self.period_fees
+        if self.billing_period == 1:
+            period = ""
+        else:
+            period = self.billing_period
+        return "{period_fee}€ / {billing_period} mois".format(
+            period_fee=fee,
+            billing_period=period)
+
     def __unicode__(self):
-        return '{name} - {period_fee}€ / {billing_period}m'.format(
-            name=self.name,
-            period_fee=self.period_fees,
-            billing_period=self.billing_period)
+        return '{name} - {price}'.format(name=self.name,
+                                         price=self.display_price())
 
     class Meta:
         verbose_name = 'offre'