Rails - Feb 2006 - Formatting values of numbers using text_field

Anyone have a quick solution on how to format a number in a text_field
tag?

<% text_field "price", "amount" %>  returns 100.0  
and it would be nice
if it showed 100.00

Of course, number_with_precision works nicely, but how do you make that
work with text_field?

I thought maybe overriding the getter in the model. However, this means
I would have to bring the helper code into the model which I''m not sure
I like. 


Brian Hogan
Web Development
Learning & Technology Services
Schofield 3-B
University of Wisconsin-Eau Claire
715 836 3585
hoganbp@uwec.edu

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On 24 Feb 2006, at 18:08, Hogan, Brian P. wrote:
> Anyone have a quick solution on how to format a number in a  
> text_field tag?
>
> <% text_field "price", "amount" %>  returns 100.0
and it would be
> nice if it showed 100.00
>
> Of course, number_with_precision works nicely, but how do you make  
> that work with text_field?
>
> I thought maybe overriding the getter in the model. However, this  
> means I would have to bring the helper code into the model which  
> I''m not sure I like.
If you mean formatting the field when the user exits the field, you  
should use JavaScript (or write a small JavaScript Helper method, so  
you can easily use it throughout your whole application) :

http://www.pageresource.com/jscript/j_a_03.htm


Best regards

Peter De Berdt

Hogan, Brian P. wrote:
> Anyone have a quick solution on how to format a number in a text_field tag?
> 
> <% text_field "price", "amount" %>  returns 100.0
and it would be nice
> if it showed 100.00
> 
> Of course, number_with_precision works nicely, but how do you make that 
> work with text_field?
> 
> I thought maybe overriding the getter in the model. However, this means 
> I would have to bring the helper code into the model which I''m not
sure
> I like.
Yes, overriding the attribute getter and setter is what I do:

def amount_s
   ''%.2f'' % amount
end

def amount_s= (amount)
   self.amount = amount.to_f
end

<%= text_field :price, :amount_s %>

-- 
We develop, watch us RoR, in numbers too big to ignore.