Rails 3. How to display two decimal places in edit form?
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)
Alternatively, you can use the format string "%.2f" % 1.5. http://ruby-doc.org/docs/ProgrammingRuby/html/ref_m_kernel.html#Kernel.sprintf
For this I use the number_to_currency formater. Since I am in the US the defaults work fine for me.
<% price = 45.9999 %><price><%= number_to_currency(price)%></price>=> <price>$45.99</price>You can also pass in options if the defaults don't work for you.Documentation on available options at api.rubyonrails.org