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I use:
<%= select( "payment", "id", { "Visa" => "1", "Mastercard" => "2"}) %>
and I get this in HTML
<select id="payment_id" name="payment[id]"><option value="2">Mastercard</option>
<option value="1">Visa</option></select>
now how can I read the payment[id] with params[], if I use params[payment[id]] I get an error.
I suppose is better to have
params[:payment][:id]Params is a hash and can be contain some other hash.