method

sum

v5.0.0.1 - Show latest stable - 0 notes - Class: ActiveRecord::Calculations

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What's this?

sum(column_name = nil, &block) public

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

Show source

# File activerecord/lib/active_record/relation/calculations.rb, line 74
    def sum(column_name = nil, &block)
      return super(&block) if block_given?
      calculate(:sum, column_name)
    end

sum

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