Rails - Dec 2005 - using one-dimensional arrays in select statements (noob)

I have an issue whereby I want the attributes on an object to be saved 
in the db as simple integers and the corresponding labels to be stored 
in the class.

DB Car:
id int, name varchar(10), speed int

Model Car:
class Car < ActiveRecord::Base
  Speed = %w{Slow Normal Fast}
end

View Car:
<select name="mycar[speed]">
<option value=0>Slow</option>
<option value=1>Normal</option>
<option value=2>Fast</option>
</select>

What is the select statement to get the options to print out like that? 
Now I know that I could set Speed to be a hash (Speed = {"slow"=>0,
"normal"=>1, "fast"=>2}) but then I would lose the
ordering, which is
important. I could use an associative array as well (Speed = [["Slow",
0],["Normal", 1],["Fast", 2]]) but this Car object will have
a number of
similar attributes so that would seem to violate the DRY principal 
having to put 0, 1, 2, etc in every time.

Is there a way to print out a select statement using a simple 
one-dimensional array with the item''s index value acting as the key in 
the option tag?

I very much want to do this the Ruby way. Any help would be greatly 
appreciated.

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On 12/6/05, sean <ruby-forum.com-QAFWIqWfQhF54TAoqtyWWQ@public.gmane.org>
wrote:
> What is the select statement to get the options to print out like that?
> Now I know that I could set Speed to be a hash (Speed =
{"slow"=>0,
> "normal"=>1, "fast"=>2}) but then I would lose
the ordering, which is
> important. I could use an associative array as well (Speed =
[["Slow",
> 0],["Normal", 1],["Fast", 2]]) but this Car object will
have a number of
> similar attributes so that would seem to violate the DRY principal
> having to put 0, 1, 2, etc in every time.
There isn''t a method that does exactly what you want, as far as I
know. But here''s an idea that is pretty good with regards to DRY:

class Array
  def with_indexes
     a = []
     each_with_index {|x,i| a << [x,i]}
     a
  end
end

Model Car:
class Car < ActiveRecord::Base
 @@speeds = %w{Slow Normal Fast}
 cattr_reader :speeds
end

View Car:
select("mycar", "speed", Car.speeds.with_indexes)

jeremyevans0 wrote:
> 
> There isn''t a method that does exactly what you want, as far as I
> know. But here''s an idea that is pretty good with regards to DRY:
> 
That is an excellent solution, thanks very much for your input on what 
was a vexing issue.


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