Rails 3.如何在编辑表单中显示两位小数位? [英] Rails 3. How to display two decimal places in edit form?
问题描述
但是,当我存储诸如1.5的东西时,我想将其显示为1.50。
我怎么可以用表单助手来做这件事? <%= f.text_field:cost,:class => 'cost'%>
您应该使用 number_with_precision
helper。 查看文档。
示例:
number_with_precision(1.5,:precision => 2)
=> 1.50
在你的表格助手中:
<%= f.text_field:cost,:class => 'cost',:value => (number_with_precision(f.object.cost,:precision => 2)|| 0)%>
顺便说一句,如果您真的想显示一些价格,请使用 number_to_currency
,doc的相同页面(在表单上下文中,我会保留 number_with_precision
,你不想搞乱钱符号)
I have this edit form.
But when I store something such as 1.5, I would like to display it as 1.50.
How could I do that with the form helper? <%= f.text_field :cost, :class => 'cost' %>
You should use number_with_precision
helper. See doc.
Example:
number_with_precision(1.5, :precision => 2)
=> 1.50
Within you form helper:
<%= f.text_field :cost, :class => 'cost', :value => (number_with_precision(f.object.cost, :precision => 2) || 0) %>
BTW, if you really want to display some price, use number_to_currency
, same page for doc (In a form context, I'd keep number_with_precision
, you don't want to mess up with money symbols)
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