Rails - Oct 2005 - complex form problem

Hi,

My application allows players to enter a tennis match into a database.
Each match has at least one and a maximum of five sets, represented by 
the set_scores table and model.

class Match < ActiveRecord::Base
   has_many :set_scores
end

class SetScore < ActiveRecord::Base
end


DDL of set_scores

CREATE TABLE "public"."set_scores" (
   "match_id" INTEGER NOT NULL,
   "set_nr" SMALLINT NOT NULL,
   "score_opp1" SMALLINT NOT NULL,
   "score_opp2" SMALLINT NOT NULL,
   CONSTRAINT "set_scores_fk" FOREIGN KEY ("match_id")
     REFERENCES "public"."matches"("id")
     ON DELETE CASCADE
     ON UPDATE CASCADE
     DEFERRABLE
     INITIALLY DEFERRED
) WITH OIDS;

Now my problem is how do I generate the correct form for this?

(fragment _form.rhtml)
<% for i in 1..5 %>
<%= hidden_field "set_score[]", "set_nr", {:value => i
} %>
<tr>
	<th>Set <%=i%></td>
	<td class="center"><%= text_field "set_score[]",
''score_opp1'', "size"
=> 3  %></td>
	<td class="center">-</td>
	<td class="center"><%= text_field "set_score[]",
''score_opp2'', "size"
=> 3 %></td>
</tr>
<% end %>

This doesn''t work as it doesn''t create an array of set_scores,
the HTML
output is simply this:

<input id="set_score_set_nr" name="set_score[set_nr]"
type="hidden"
value="1" />
<tr>
<th>Set 1</td>
<td class="center"><input id="set_score_score_opp1"
name="set_score[score_opp1]" size="3" type="text"
/></td>
<td class="center">-</td>
<td class="center"><input id="set_score_score_opp2"
name="set_score[score_opp2]" size="3" type="text"
/></td>
</tr>

<input id="set_score_set_nr" name="set_score[set_nr]"
type="hidden"
value="2" />
<tr>
<th>Set 2</td>
<td class="center"><input id="set_score_score_opp1"
name="set_score[score_opp1]" size="3" type="text"
/></td>
<td class="center">-</td>
<td class="center"><input id="set_score_score_opp2"
name="set_score[score_opp2]" size="3" type="text"
/></td>
</tr>
...

I want it to output something like:
<input name="set_score[][set_nr]" type="hidden"
value="2" />

I also tried putting this in the controller

def new
   @match = Match.new
   @set_scores = [SetScore.new, SetScore.new, SetScore.new, 
SetScore.new, SetScore.new]
end

And this in _form.rhtml

<% for @set_score in @set_scores %>
<tr>
	<th>Set </td>
	<td class="center"><%= text_field "set_score[]",
''score_opp1'', "size"
=> 3  %></td>
	<td class="center">-</td>
	<td class="center"><%= text_field "set_score[]",
''score_opp2'', "size"
=> 3 %></td>
</tr>
<% end %>

Again with no luck...

Jeroen