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Contents
module ESA
module Associations
# Association extension for has_many :amounts relations. Internal.
module AmountsExtension
# Returns a total sum of the referenced Amount objects
def total
sums = group('esa_amounts.amount is null').
sum(:amount)
checked = sums.map do |s|
amount_is_nil, amount = s.flatten
amount
end
if checked.all?
return checked.inject(BigDecimal(0)){|x,y| x + y}
else
return nil
end
end
# Returns a sum of the referenced Amount objects.
def balance
sums = group('esa_amounts.amount is null').
group('esa_amounts.type').
sum(:amount)
signed = sums.map do |s|
amount_is_nil, amount_type, amount = s.flatten
amount_type = amount_type.demodulize.downcase
if amount_type == "debit"
amount
elsif amount_type == "credit"
- amount
else
nil
end
end
if signed.all?
return signed.inject(BigDecimal(0)){|x,y| x + y}
else
return nil
end
end
# Returns a sum of the referenced Amount objects.
def iterated_total
amounts = map(&:amount)
if amounts.all?
amounts.inject(BigDecimal(0)){|x,y| x + y}
else
return nil
end
end
# Returns a sum of the referenced Amount objects.
def iterated_balance
amounts = map do |a|
if a.is_debit?
a.amount
elsif a.is_credit? and not a.amount.nil?
- a.amount
else
nil
end
end
if amounts.all?
amounts.inject(BigDecimal(0)){|x,y| x + y}
else
return nil
end
end
end
end
end
Version data entries
9 entries across 9 versions & 1 rubygems