Fix balance and order paying

app/models/order.rb

@@ -33,7 +33,7 @@ class Order < ActiveRecord::Base
   def price
     price = 0
     products.each do |p|
-      price += p.price * p.count(self)
+      price += p.read_attribute(:price) * p.count(self)
     end
     price
   end

app/models/user.rb

@@ -39,6 +39,16 @@ class User < ActiveRecord::Base
   end
 
   def pay(amount)
-    self.increment!(:balance, - amount)
+    write_attribute(:balance, read_attribute(:balance) - amount)
+    self.save
+  end
+
+  def balance
+    (read_attribute(:balance) || 0) / 100.0
+  end
+
+  def balance=(value)
+    if value.is_a? String then value.sub!(',', '.') end
+    write_attribute(:balance, (value.to_f * 100).to_int)
   end
 end

app/views/users/_user.html.erb

@@ -6,7 +6,7 @@
       <p><strong>Name:</strong> <%= user.name %></p>
       <p><strong>Last name:</strong> <%= user.last_name %></p>
       <p><strong>Nickname:</strong> <%= user.nickname %></p>
-      <p><strong>Balance:</strong> <%= user.balance %></p>
+      <p><strong>Balance:</strong> <%= euro(user.balance) %></p>
     </div>
     <div class="footer">
       <p>