Learn by Doing wrote:
> How do I create a radio_button_tag for every value of a constant
> array?  E.g., I have this constant array:  VALID_ORIENTATIONS =
> ["Straight", "Gay", "Bisexual"]  .  A user is presented with a form to
> search for other users according to sexual orientation.  Currently,
> the form looks like this:
> 
> <div class="form_row">
>     <label for="orientation">Sexual Orientation:</label>
>     <%= radio_button_tag :orientation, "Straight",
>     params[:orientation] == 'Straight',
>     :id => "Straight" %>Straight
>     <%= radio_button_tag :orientation, "Gay",
>     params[:orientation] == 'Gay',
>     :id => "Gay" %>Gay
>     <%= radio_button_tag :orientation, "Bisexual",
>     params[:orientation] == 'Bisexual',
>     :id => "Bisexual" %>Bisexual
>     <%= radio_button_tag :orientation, "",
>     params[:orientation].blank?,
>     :id => "Any" %>Any
>   </div>
> 
> This is not DRY.  How can I iterate through every value in the
> constant array to make these radio buttons?  Is partial appropriate
> for this?  The array has only three values.
>

You used the word "iterate" to describe what you want to do.  Does that 
ring any bells?  Right!  Use Array#each or render :partial, :collection.

Also: consider using the array indices, not the actual words, for the 
value attributes of the buttons.

BTW, why aren't you using Haml?


> Also: the blank in the last radio button is obviously not in the
> array.  It's there to allow the user to not use this search
> criterion.  Is there a better way for a user to unselect a radio
> button without choosing any other?

No.  Use a <select> element instead (and check out collection_select).

> 
> Thanks.

Best,
-- 
Marnen Laibow-Koser
http://www.marnen.org
mar...@marnen.org
-- 
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