Error "No Method" when using delayed job - ruby-on-rails

Question

I'm trying to import 90k lines of xml into my ruby app. herokus timeout limit is 30s so i'm trying to use delayed job.
The import class works wonderfully in around 48-hippopotomuses locally. When i add the line
handle_asynchronously :save_races
I get the error "undefined method save_races' for classXmltube'"
What am i doing wrong with DJ and how can i get this to work?
Full class code below
require "rexml/document"
class Xmltube
def self.convert_save(xml_data)
doc = REXML::Document.new xml_data.read
doc.elements.each("Meeting") do |meeting_element|
meeting = save_meeting(meeting_element)
save_races(meeting_element, meeting)
Rails.logger.info "all done"
end
end
def self.save_races(meeting_element, meeting)
meeting_element.elements.each("Races/Race") do |race_element|
race = save_race(race_element, meeting)
save_race_entrants(race_element, race)
end
end
def self.save_race_entrants(race_element, race)
race_element.elements.each("RaceEntries/RaceEntry") do |entry_element|
horse = save_horse(entry_element)
jockey = save_jockey(entry_element)
start = save_start(entry_element, horse, jockey, race)
save_sumaries(entry_element, start)
end
end
def self.save_track(meeting_element)
# there is only one track, but still, each? wtf.
t = {}
meeting_element.elements.each("Track") do |track|
t = {
:name => track.attributes["VenueName"],
:track_code => track.attributes["VenueCode"],
:condition => track.elements['TrackRating'].text,
:club_id => save_club(meeting_element.elements["Club"]).id
}
end
track = Track.where(:track_code => t[:track_code] ).first
if track
Track.update(track.id, t)
else
Track.create(t)
end
end
def self.save_meeting meeting_element
t = {
:meet_code => meeting_element.attributes['MeetCode'],
:stage => meeting_element.elements["MeetingStage"].text,
:phase => meeting_element.elements["MeetingPhase"].text,
:nominations_close_at => meeting_element.elements["NominationsClose"].text,
:acceptance_close_at => meeting_element.elements["AcceptanceClose"].text,
:riders_close_at => meeting_element.elements["RidersClose"].text,
:weights_published_at => meeting_element.elements["WeightsPublishing"].text,
:club_id => save_club(meeting_element.elements["Club"]).id ,
:track_id => save_track(meeting_element).id,
:tab_status => meeting_element.elements["TabStatus"].text,
:state => meeting_element.elements["StateDesc"].text,
:day_night => meeting_element.elements["DayNight"].text,
:number_of_races => meeting_element.elements["NumOfRaces"].text,
:meet_date => meeting_element.elements["MeetDate"].text,
}
meeting = Meeting.where(:meet_code => t[:meet_code] ).first
if meeting
Meeting.update(meeting.id, t)
else
Meeting.create(t)
end
end
############################################################
def self.save_sumaries entry_element, start
entry_element.elements.each('Form/ResultsSummaries/ResultsSummary') do | element |
s = {
:name => element.attributes['Name'],
:start_id => start.id,
:starts => element.attributes['Starts'],
:wins => element.attributes['Wins'],
:seconds => element.attributes['Seconds'],
:thirds => element.attributes['Thirds'],
:prize_money => element.attributes['PrizeMoney'],
}
sum = Summary.where(:name => s[:name] ).where(:start_id => s[:start_id]).first
if sum
Summary.update(sum.id, s)
else
Summary.create(s)
end
end
end
def self.save_start entry_element, horse, jockey, race
s = {
:horse_id => horse.id,
:jockey_id => jockey.id,
:race_id => race.id,
:silk => entry_element.elements["JockeySilksImage"].attributes["FileName_NoExt"],
:start_code => entry_element.attributes['RaceEntryCode'],
:handicap_weight => entry_element.elements['HandicapWeight'].text,
}
# Rails.logger.info entry_element['HandicapWeight'].text
start = Start.where(:start_code => s[:start_code] ).first
if start
Start.update(start.id, s)
else
Start.create(s)
end
end
def self.save_jockey entry_element
j={
:name => entry_element.elements['JockeyRaceEntry/Name'].text,
:jockey_code => entry_element.elements['JockeyRaceEntry'].attributes["JockeyCode"],
}
jockey = Jockey.where(:jockey_code => j[:jockey_code] ).first
if jockey
Jockey.update(jockey.id, j)
else
Jockey.create(j)
end
end
def self.save_horse entry_element
trainer = save_trainer entry_element
h= {
:name => entry_element.elements['Horse'].attributes["HorseName"],
:color => entry_element.elements['Horse'].attributes["Colour"],
:dob => entry_element.elements['Horse'].attributes["FoalDate"],
:sex => entry_element.elements['Horse'].attributes["Sex"],
:trainer_id => trainer.id,
:horse_code => entry_element.elements['Horse'].attributes["HorseCode"],
}
horse = Horse.where(:horse_code => h[:horse_code] ).first
if horse
Horse.update(horse.id, h)
else
Horse.create(h)
end
end
def self.save_trainer entry_element
t= {
:name => entry_element.elements['Trainer/Name'].text,
:trainer_code => entry_element.elements['Trainer'].attributes["TrainerCode"]
}
trainer = Trainer.where(:trainer_code => t[:trainer_code] ).first
if trainer
Trainer.update(trainer.id, t)
else
Trainer.create(t)
end
end
def self.save_club element
t = {}
t = {
:club_code => element.attributes['ClubCode'],
:title => element.attributes["Title"],
}
club = Club.where(:club_code => t[:club_code] ).first
if club
Club.update(club.id, t)
else
Club.create(t)
end
end
def self.save_race element, meeting
r = {
:name => element.elements['NameRaceFull'].text,
:occur => element.elements['RaceStartTime'].attributes["TimeAtVenue"],
:distance => element.elements['RaceDistance'].text,
:race_type => element.elements['RaceType'].text,
:track_id => meeting.track_id,
:race_code => element.attributes["RaceCode"],
:meeting_id => meeting.id
}
race = Race.where(:race_code => r[:race_code] ).first
if race
Race.update(race.id, r)
else
Race.create(r)
end
end
handle_asynchronously :save_races
end

Answer 1

Since your save_races is a class method, you should call handle_asynchronously on Xmltube's singleton class:
class << self
handle_asynchronously :save_races
end

Answer 2

This just worked as I would expect
class Foo
def self.bar(s)
Rails.logger.info "From Foo.bar('#{s}')"
end
end
# then ...
Foo.delay.bar('hello')
I was running 4.0.4 of DJ with ruby 2.1