Don't show XML attributes if they ar eblank or nil

Rails
1

Hi, I’m creating a dynamic xml file using builder in Rails, which pulls
from several different related tables. Some of my nodes include
attributes, but some don’t. I would like to find a way to leave out
those attributes that are blank.

My XML now:

Vermont
27%

Hawaii 100%

should look like this:

Vermont
27%

Hawaii 100%

without the blank type="" attribute.

My .builder includes this:

@table.each do |r|
xml.row(:line => r[0], :type=> r[1]) do
r.each do |i|
xml.cell(i, :column_id => ‘’)
end
end
end

I can make the value for :type => nil, but I still get the blank
attribute. I tried conditionals inside the node, but that didn’t work.
Any ideas?

Thanks.