[Rails] Collection Select Example?

[Michael Koziarski]

Nice, are there any functions like this for handling one to many
relations?  i.e a User has_and_belongs_to_many :groups.




On Tue, 23 Nov 2004 15:46:50 -0800, Jeremy Kemper <jeremy at bitsweat.net> wrote:
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> Lon Baker wrote:
> | Does anyone have an example of the proper usage of collection_select?
> 
> class User < ActiveRecord::Base
> ~  # id, name fields
> ~  belongs_to :group
> end
> 
> class Group < ActiveRecord::Base
> ~  # id, name fields
> ~  has_many :users
> end
> 
> class UserController < AbstractApplicationController
> ~  model :user
> ~  def edit
> ~    @user = User.find(@params['id'])
> ~  end
> end
> 
> views/user/edit.rhtml
> <%= collection_select 'user', 'group_id', Group.find_all, 'id', 'name' %>
> 
> This invocation will generate a select tag name="user[group_id]" with
> options of form <option value="group.id">group.name</option>.  The
> option with group.id == user.group_id will be selected.
> 
> Hope this helps,
> jeremy
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-- 
Cheers

Koz