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Versions: 15
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Contents
module ClarkKent
class ReportColumn < ActiveRecord::Base
include ClarkKent::Cloneable
SummaryMethods = ['total','average']
belongs_to :report
scope :sorted, -> { order("clark_kent_report_columns.column_order") }
def report_sort_pretty
{'ascending' => 'A->Z','descending' => 'Z->A'}[self.report_sort]
end
def calculate_summary(values)
return nil unless self.summary_method.present?
calculator.new(values).calculate
end
def summarizable?
report.column_options_for(self.column_name.to_sym).summarizable
end
def calculator
('ClarkKent::' + summary_method.camelcase + 'Calculator').constantize
end
def name
column_name
end
def link
report.column_options_for(self.name.to_sym).link
end
end
class AbstractCalculator
def initialize values
@values = values
end
end
class TotalCalculator < AbstractCalculator
def calculate
@values.sum
end
end
class AverageCalculator < AbstractCalculator
def calculate
if @values.length < 1
return nil
else
return (@values.sum.to_f / @values.length)
end
end
end
end
Version data entries
15 entries across 15 versions & 1 rubygems