NoMethodError: undefined method `encode_json' for Sun, 28 Nov 2010 00:00:00 -0500:DateTime

[mrichman]

I have a model defined as follows:

`

class Match
include DataMapper::Resource

storage_names[:default] = 'matches'

property :id, Serial, :field => 'matches_id', :required => true

def self.find_matches
repository.adapter.select <<-SQL
select
m.matches_id,
m.begin_date,
m.windows_time_zone,
team1_id,
team2_id,
t1.name as team1,
t2.name as team2,
m.status,
COALESCE(md.name,'') as match_day_name,
s.name as season_name,
r.name as round_name,
c.name as competition_name,
COALESCE(g.name,'') as group_name,
COALESCE(m.use_gsm,'N') as use_gsm,
COALESCE(m.team1_finalscore,0) as team1_score,
COALESCE(m.team2_finalscore,0) as team2_score
from matches m
inner join round r on (r.round_id = m.round_id)
inner join season s on (s.season_id = r.season_id)
inner join competition c on (c.competition_id = s.competition_id)
inner join team t1 on (t1.team_id = m.team1_id)
inner join team t2 on (t2.team_id = m.team2_id)
left outer join match_day md on (m.match_day_id = md.match_day_id)
left outer join groups g on (r.round_id = g.round_id)
where m.begin_date <= (CURDATE() + interval 1 day)
and m.begin_date >= (CURDATE() - interval 1 day)
order by m.begin_date desc
SQL
end
end

`

Calling Match.find_matches from the console returns an array of
structs like the following:

#<struct matches_id=54235, begin_date=Sun, 28 Nov 2010 00:00:00 -0500, windows_time_zone="Morocco Standard Time", team1_id=937, team2_id=943, team1="Deportes Tolima", team2="La Equidad", status="N", match_day_name="Cuadrangular Semifinal Fecha 3", season_name="Finalizacion 2010", round_name="Cuadrangular Semifinal", competition_name="Liga Postobon - Colombia", group_name="", use_gsm="N", team1_score=0, team2_score=0>

It appears that to_json is choking on the begin_date format. Is there
anything I can do to correct this? I'm using MySQL 5.1 if that helps.