using DecimalField instead of IntegerField for currency amounts

cash/models.py

@@ -10,7 +10,7 @@ class Account(models.Model):
 	                               null=True)
 	pin = models.CharField(max_length=32, blank=True)
 	daily_digest = models.BooleanField()
-	credit = models.IntegerField(default=0)
+	credit = models.DecimalField(max_digits=5, decimal_places=2, default=0)
 
 	def __unicode__(self):
 		return self.user.username
@@ -65,7 +65,7 @@ class ProductCategory(models.Model):
 
 class Product(models.Model):
 	name = models.CharField(max_length=32, unique=True)
-	price = models.IntegerField()
+	price = models.DecimalField(max_digits=5, decimal_places=2)
 	deleted = models.BooleanField()
 	category = models.ForeignKey(ProductCategory, blank=True, null=True)
 
@@ -85,13 +85,13 @@ class Transaction(models.Model):
 	timestamp = models.DateTimeField(auto_now_add=True)
 	subject = models.CharField(max_length=32)
 	description = models.TextField()
-	amount = models.IntegerField()
+	amount = models.DecimalField(max_digits=5, decimal_places=2)
 
 class SalesLogEntry(models.Model):
 	account = models.ForeignKey(Account)
 	product = models.ForeignKey(Product)
 	count = models.IntegerField()
-	unit_price = models.IntegerField()
+	unit_price = models.DecimalField(max_digits=5, decimal_places=2)
 	timestamp = models.DateTimeField(auto_now_add=True)