Rails - Jun 2010 - Can i use a hash on a collection_select? If don't, alternatives.

In my current application, i have food categories: mexican, home made,
japanese, ect
As these categories only have ID and name, no other attributes, i dont
want to create a table on the DB.
My first idea was to create a constant named FOOD_CATEGORIES, that is
has like:
FOOD_CATEGORIES = { 1=>''mexican'',
                                       2=>''japanese'', ... }
BUT, since the hash doesn''t have :id method, i dont know how to use
this constant on a collection_select in my views.

Do you have a better idea?

Thanks

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On 17 June 2010 12:17, Miguel.camba
<miguel.camba-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
> In my current application, i have food categories: mexican, home made,
> japanese, ect
> As these categories only have ID and name, no other attributes, i dont
> want to create a table on the DB.
> My first idea was to create a constant named FOOD_CATEGORIES, that is
> has like:
> FOOD_CATEGORIES = { 1=>''mexican'',
>                                       2=>''japanese'',
... }
> BUT, since the hash doesn''t have :id method, i dont know how to
use
> this constant on a collection_select in my views.
>
> Do you have a better idea?
Maybe options_for_select is what you are looking for.

Colin

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I dont think so. I want to show a select that shows que values of the
hash but the stored data when you submit a form is the key of that
value un the hash.


On Jun 17, 2:29 pm, Colin Law
<clan...-gM/Ye1E23mwN+BqQ9rBEUg@public.gmane.org>
wrote:
> On 17 June 2010 12:17, Miguel.camba
<miguel.ca...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>
> > In my current application, i have food categories: mexican, home made,
> > japanese, ect
> > As these categories only have ID and name, no other attributes, i dont
> > want to create a table on the DB.
> > My first idea was to create a constant named FOOD_CATEGORIES, that is
> > has like:
> > FOOD_CATEGORIES = { 1=>''mexican'',
> >                                      
2=>''japanese'', ... }
> > BUT, since the hash doesn''t have :id method, i dont know how
to use
> > this constant on a collection_select in my views.
>
> > Do you have a better idea?
>
> Maybe options_for_select is what you are looking for.
>
> Colin
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I have just found a solution, but using a helper
In application_helper i wrote this function:
  def select_from_hash(object, name, arg)
    select = "<select id=\"#{object}_#{name}\"
name=\"#{object}
[#{name}]\""
    arg.each do |i,e|
      select += "<option
value=\"#{i}\">#{e}</option>"
    end
    select += "</select>"
  end
And in my views I use it this way (im using Haml):
.field= render :inline=> select_from_hash(:profile, :loved_food,
CATEGORIES)

Works fine but im all ears for other-more-elegant approach.

On Jun 17, 5:40 pm, "Miguel.camba"
<miguel.ca...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
> I dont think so. I want to show a select that shows que values of the
> hash but the stored data when you submit a form is the key of that
> value un the hash.
>
> On Jun 17, 2:29 pm, Colin Law
<clan...-gM/Ye1E23mwN+BqQ9rBEUg@public.gmane.org> wrote:
>
>
>
> > On 17 June 2010 12:17, Miguel.camba
<miguel.ca...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>
> > > In my current application, i have food categories: mexican, home
made,
> > > japanese, ect
> > > As these categories only have ID and name, no other attributes, i
dont
> > > want to create a table on the DB.
> > > My first idea was to create a constant named FOOD_CATEGORIES,
that is
> > > has like:
> > > FOOD_CATEGORIES = { 1=>''mexican'',
> > >                                      
2=>''japanese'', ... }
> > > BUT, since the hash doesn''t have :id method, i dont know
how to use
> > > this constant on a collection_select in my views.
>
> > > Do you have a better idea?
>
> > Maybe options_for_select is what you are looking for.
>
> > Colin
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