Hi, I have built a select field that allows multiple options selected with collection_select and "multiple"=>"multiple". How do I go about receiving the values? If I use a variable name like collection[], it complains that I can''t use @collection[] as the instance variable. TIA victor
Victor Jalencas wrote:> Hi, > > I have built a select field that allows multiple options selected with > collection_select and "multiple"=>"multiple". How do I go about > receiving the values? If I use a variable name like collection[], it > complains that I can''t use @collection[] as the instance variable. > > > TIA > > victorHmm, you may have to assemble the <select> method yourself and then use options_from_collection_for_select, like this: <select name="foo[]" multiple="multiple"> <%= options_for_collection_from_select(@collection, ''name'', ''id'') %> </select> It sounds logical, though, that collection_select could be given an option to produce a multiple select. I think that would be generally useful. Care to take a stab at it? :) -Scott _______________________________________________ Rails mailing list Rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org http://lists.rubyonrails.org/mailman/listinfo/rails
Actually, I can create such code. Here it is:
<%= collection_select ("collection", "id",
@collections,''id'', ''name'',
{}, "multiple"=>''multiple'' ,
"size"=>5) %>
However, what I don''t know is what to put in the controller to process
the form data. If I leave the code as that, I only receive the first
selected item. If I do use "collection[]" as the first parameter, I
get
this exception:
`@collection[]'' is not allowed as an instance variable name
victor
Scott Barron wrote:> Victor Jalencas wrote:
>
>> Hi,
>>
>> I have built a select field that allows multiple options selected
>> with collection_select and
"multiple"=>"multiple". How do I go about
>> receiving the values? If I use a variable name like collection[], it
>> complains that I can''t use @collection[] as the instance
variable.
>>
>>
>> TIA
>>
>> victor
>
>
> Hmm, you may have to assemble the <select> method yourself and then
use
> options_from_collection_for_select, like this:
>
> <select name="foo[]" multiple="multiple">
> <%= options_for_collection_from_select(@collection,
''name'', ''id'') %>
> </select>
>
> It sounds logical, though, that collection_select could be given an
> option to produce a multiple select. I think that would be generally
> useful. Care to take a stab at it? :)
>
> -Scott
>
>
> ------------------------------------------------------------------------
>
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> Rails mailing list
> Rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org
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Victor Jalencas wrote:> Actually, I can create such code. Here it is: > > <%= collection_select ("collection", "id", @collections,''id'', ''name'', > {}, "multiple"=>''multiple'' , "size"=>5) %> > > However, what I don''t know is what to put in the controller to process > the form data. If I leave the code as that, I only receive the first > selected item. If I do use "collection[]" as the first parameter, I get > this exception: > > `@collection[]'' is not allowed as an instance variable name >Right, perhaps I wasn''t very clear. What I was saying is that if collection_select is given the multiple option it should name the select element appropriately, that is "foo[]". As you''re experiencing, collection_select will not currently do this. What it needs is either a separate multiple options, or to scan the html_options for "''multiple'' => ''multiple''" and name the outputted select tag appropriately. -Scott _______________________________________________ Rails mailing list Rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org http://lists.rubyonrails.org/mailman/listinfo/rails
Ah, you''re right. I just realized what you mean. So, the form helper should examine html_options and upon finding multiple, rename the variable so that it ends with [] (as opposed to doing it myself, which doesn''t end up right) Well, at least I know how to do it meanwhile, and how to receive the values -- request dump is so grand! victor Scott Barron wrote:> Victor Jalencas wrote: > >> Actually, I can create such code. Here it is: >> >> <%= collection_select ("collection", "id", @collections,''id'', ''name'', >> {}, "multiple"=>''multiple'' , "size"=>5) %> >> >> However, what I don''t know is what to put in the controller to process >> the form data. If I leave the code as that, I only receive the first >> selected item. If I do use "collection[]" as the first parameter, I >> get this exception: >> >> `@collection[]'' is not allowed as an instance variable name >> > > Right, perhaps I wasn''t very clear. What I was saying is that if > collection_select is given the multiple option it should name the select > element appropriately, that is "foo[]". As you''re experiencing, > collection_select will not currently do this. What it needs is either a > separate multiple options, or to scan the html_options for "''multiple'' > => ''multiple''" and name the outputted select tag appropriately. > > > -Scott > > > ------------------------------------------------------------------------ > > _______________________________________________ > Rails mailing list > Rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org > http://lists.rubyonrails.org/mailman/listinfo/rails