activerecord/lib/active_record/relation/calculations.rb
# Calculates the sum of values on a given column. The value is returned
# with the same data type of the column, 0 if there's no row. See
# +calculate+ for examples with options.
#
#   Person.sum('age') # => 4562
Calculates the sum of values on a given column. The value is returned
with the same data type of the column, 0 if there's no row. See
+calculate+ for examples with options.


Calculates the sum of values on a given column . The value is returned with the same data type of the column 0 if there ' s no row . See + calculate + for examples with options .
def sum(*args)
      if block_given?
        ActiveSupport::Deprecation.warn(
          "Calling #sum with a block is deprecated and will be removed in Rails 4.1. " \
          "If you want to perform sum calculation over the array of elements, use `to_a.sum(&block)`."
        )
        self.to_a.sum(*args) {|*block_args| yield(*block_args)}
      else
        calculate(:sum, *args)
      end
    end
def sum ( * args ) if block_given? ActiveSupport :: Deprecation . warn ( "Calling #sum with a block is deprecated and will be removed in Rails 4.1. " "If you want to perform sum calculation over the array of elements, use `to_a.sum(&block)`." ) self . to_a . sum ( * args ) { | * block_args | yield ( * block_args ) } else calculate ( :sum , * args ) end end
Calculates the sum of values on a given column.
Calculates the sum of values on a given column .
args