One-to-Many Associations (newbie)

- - begin code - -

  class Band < ActiveRecord::Base
    belongs_to :tours
  end

  class Tour < ActiveRecord::Base
    has_one :bands
  end

First, this should be has_one :band, not :bands

- - begin code - -

  <p><label for="band_id">Band</label><br>
  <%= select("band", "band_id", Band.find_all.collect {|p| [ p.name,
p.id ] }) %>

I don't know how did you built your DB schema, but it should be
something like this