https://rails.lighthouseapp.com/projects/8994-ruby-on-rails/tickets/2373-record-sensitive-procs-for-to_xml
This is a patch that I contributed a couple of months ago. In short,
the point is to enable procs to access the record being serialized by
adding support for another argument in proc's goalposts. With this
patch you can no do something like:
proc = Proc.new { |options, record| options[:builder].tag!('name-
reverse', record.name.reverse) }
@records.to_xml :procs => [ proc ]
Which would, of course, add a reversed string of the name to each
serialized record.
to_xml is incredibly convenient when used to serialize AR objects,
because it provides a short-hand for expressing those objects without
having to resort to builder templates, hand-drawn builder instances,
and such. I think that this patch will make that expression much more
powerful without requiring invasive changes.
Further:
http://stackoverflow.com/questions/260668/building-dynamic-fields-using-activerecordserialization-toxml
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