Merge branch 'master' of git.happy-dev.fr:startinblox/djangoldp-packages/djangoldp_invoices

djangoldp_invoice/models.py

@@ -61,9 +61,11 @@ class CustomerInvoice(Model):
     additionalText = models.CharField(max_length=255, blank=True, null=True)
 
     def htAmount(self):
+        htAmount = Decimal(0)
         if self.batches is None:
-            return self.batches.aggregate(total=Sum('tasks__htAmount'))['total']
-        return 0
+            htAmount = self.batches.aggregate(total=Sum('tasks__htAmount'))['total']
+
+        return htAmount
 
     def tvaAmount(self):
         return Decimal(self.tvaRate * self.htAmount() / Decimal(100))