Method: ActiveRecord::Calculations#average
- Defined in:
- lib/active_record/relation/calculations.rb
#average(column_name) ⇒ Object
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
116 117 118 |
# File 'lib/active_record/relation/calculations.rb', line 116 def average(column_name) calculate(:average, column_name) end |