method

average

v4.1.8 - Show latest stable - Class: ActiveRecord::Calculations

average(column_name, options = {})

public

Calculates the average value on a given column. Returns nil if there’s no row. See calculate for examples with options.

Person.average(:age) # => 35.8

# File activerecord/lib/active_record/relation/calculations.rb, line 41
    def average(column_name, options = {})
      # TODO: Remove options argument as soon we remove support to
      # activerecord-deprecated_finders.
      calculate(:average, column_name, options)
    end

average

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