Rails 3 - Make text field accept only numeric values

Question

How do I make a text field accept only numeric values? If I press a letter or a symbol, the text field should not be filled, it should only allow numbers.

Is there a rails way to do this?

Answer 1

On the server side validate numericality:

class SomeModel
  validates :some_column, :numericality => {:only_integer => true}
end

and on the client side, add an input mask via javascript https://github.com/ruoso/jquery-regex-mask-plugin

$('#some_input').regexMask(/^\d+$/);