2009/7/2 khagimoto <[email protected]>:
>
> That did cross my mind, but I also wanted to know how to do something
> like this if it was possible. attr[:city] didn't work..
>
Use the debugger to find out why attr[:city] does not work. Google
ruby-debug and look in the ruby guides and railscasts for how to use
it if necessary.
> But here's what I'm really trying to do.
> I have a form that lets user enter transport information like arrival/
> departure airports, time, etc. If there are transits in between, user
> can add as many transits as they like - or None. When the form is
> submitted, even when there are no transits, there is one empty
> transports_transits_attributes, and I'm trying to catch that somehow
> so it doesn't get saved to the database with blanks.
>
> Here's the model:
>
> --------------------------------------------
> class Transport < ActiveRecord::Base
>
> has_many :users, :through => :transports_users
> has_many :transports_transits, :dependent => :destroy
> accepts_nested_attributes_for :transports_transits, :allow_destroy
> => true
>
> end
> --------------------------------------------
>
> and the form snippet for where transits are added/removed
>
> --------------------------------------------
> <div id="transits" style="display: none">
> <% f.fields_for :transports_transits do |i| %>
> <%= render :partial => 'transport_transit', :locals => { :form =>
> i } %>
> <% end %>
> </div>
> <%= add_transport_transit_link(f) %>
> --------------------------------------------
>
> and in the helper, I have
> --------------------------------------------
> def add_transport_transit_link(form_builder)
> link_to_function 'Add transits' do |page|
> form_builder.fields_for :transports_transits,
> TransportsTransit.new, :child_index => 'NEW_RECORD' do |f|
> html = render(:partial => 'transport_transit', :locals =>
> { :form => f })
> page << "if($('transits').visible()) $('transits').insert
> ({ bottom: '#{escape_javascript(html)}'.replace(/NEW_RECORD/g, new Date
> ().getTime()) }); else $('transits').show();"
> end
> end
> end
> --------------------------------------------
>
> As you can see, at first, this div is invisible and only becomes
> visible when the add_transport_transit_link is clicked for the first
> time by the user. The subsequent click will actually add more
> transport_transit form.
>
> *** So the real problem is that the first transit form is there
> (although invisible).***
>
> I couldn't figure out how to not have the first transit initially -
> and that's why I was trying to deal with it after the fact. I hope
> I'm making sense here.
This is a bit out of my comfort zone, can anyone else help?
Colin
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