Rails 3. How to display two decimal places in edit form?

Question

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.

Answer 1

For this I use the number_to_currency formater. Since I am in the US the defaults work fine for me.

<% price = 45.9999 %>
<%= number_to_currency(price)%>
=> $45.99

You can also pass in options if the defaults don't work for you. Documentation on available options at api.rubyonrails.org