On Sat, Nov 14, 2009 at 6:37 AM, MaggotChild <hsomob1...@yahoo.com> wrote:
>
> When modifying a model that has a has_one or has_many relationship
> people usually create form that will submit the id of the selected
> associated object. Rails takes this into consideration with
> validations: validate_presence_of :country will validate if country
> or country_id has been set.
>
> In Rails, providing the associated ID works fine with has_one but if
> you try to do this with a has_many:
>
> form_for(@country) do |form|
> form.select :state_ids, @states
> form.select :state_ids, @states
> #etc...
>
> The selected state_ids are written to the DB as soon as they're
> assigned. What's the reasoning behind this?
> How is one supposed to assign multiple collection ids via a form?
You have to send them as an array, and assign them as an array too.
For example,
View
form.select("state_ids[]", @states)
form.select("state_ids[]", @states)
Controller
@whatever.state_ids = params[:state_ids]
You'll have to figure out the exact syntax, but that's the idea.
Hope it helps.
--
Leonardo Mateo.
There's no place like ~
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