Module: AggtiveRecord::EggScopes::Collation::ClassMethods

Defined in:
lib/aggtive_record/egg_scopes/collation.rb

Instance Method Summary collapse

Instance Method Details

#earliest_time_of(records) ⇒ Object 



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# File 'lib/aggtive_record/egg_scopes/collation.rb', line 20

def earliest_time_of(records)
  enumerable_asc_sort(records).first
end

#enumerable_asc_sort(records) ⇒ Object

Public: a helper sorts the records after ActiveRecord query, ascending

Returns a mapped array of timestamps



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# File 'lib/aggtive_record/egg_scopes/collation.rb', line 16

def enumerable_asc_sort(records)
  records.map{|r| r.send(self.datetime_attribute)}.sort 
end

#latest_time_of(records) ⇒ Object 



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# File 'lib/aggtive_record/egg_scopes/collation.rb', line 24

def latest_time_of(records)
  enumerable_asc_sort(records).last
end

#timespan_of(records) ⇒ Object

Public:

records: An ActiveRecord collection

Returns the number of seconds TODO - eliminate use of helper methods



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# File 'lib/aggtive_record/egg_scopes/collation.rb', line 33

def timespan_of(records)
  latest_time_of(records) - earliest_time_of(records)
end

#timespan_to_now(records) ⇒ Object 



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# File 'lib/aggtive_record/egg_scopes/collation.rb', line 37

def timespan_to_now(records)
  return 0 if records.empty? || records.nil?
  ::Time.now - earliest_time_of(records)
end