处理货币/货币的最佳方法是什么？ [英] What is the best method of handling currency/money?

问题描述

我正在开发一个非常基本的购物车系统。

I'm working on a very basic shopping cart system.

我有一个表项，该表的列 price 类型为整数的>。

I have a table items that has a column price of type integer.

我无法在包含欧元和美分的价格视图中显示价格值。就在Rails框架中处理货币而言，我是否缺少明显的东西？

I'm having trouble displaying the price value in my views for prices that include both Euros and cents. Am I missing something obvious as far as handling currency in the Rails framework is concerned?

推荐答案

您可能想使用在数据库中输入 DECIMAL 。在您的迁移中，执行以下操作：

You'll probably want to use a DECIMAL type in your database. In your migration, do something like this:

# precision is the total number of digits
# scale is the number of digits to the right of the decimal point
add_column :items, :price, :decimal, :precision => 8, :scale => 2

在Rails中，：decimal 类型返回为 BigDecimal ，这对价格计算非常有用。

In Rails, the :decimal type is returned as BigDecimal, which is great for price calculation.

如果您坚持使用整数，则可以手动在 BigDecimal 之间进行转换，这可能会很痛苦。

If you insist on using integers, you will have to manually convert to and from BigDecimals everywhere, which will probably just become a pain.

mcl，要打印价格，请使用：

As pointed out by mcl, to print the price, use:

number_to_currency(price, :unit => "€")
#=> €1,234.01

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