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revises the rdoc of #average according to 5f3bd55, and realigns when clauses

This commit is contained in:
Xavier Noria 2010-05-12 08:47:55 +02:00
parent 5f3bd55726
commit 7321a3a7d3
1 changed files with 4 additions and 5 deletions
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9
activerecord/lib/active_record/relation/calculations.rb
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@ -45,9 +45,8 @@ module ActiveRecord
calculate(:count, column_name, options)
end
# Calculates the average value on a given column. The value is returned as
# a float, or +nil+ if there's no row. See +calculate+ for examples with
# options.
# 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
def average(column_name, options = {})
@ -241,8 +240,8 @@ module ActiveRecord
def type_cast_calculated_value(value, column, operation = nil)
if value.is_a?(String) || value.nil?
case operation
when 'count' then value.to_i
when 'sum' then type_cast_using_column(value || '0', column)
when 'count' then value.to_i
when 'sum' then type_cast_using_column(value || '0', column)
when 'average' then value.try(:to_d)
else type_cast_using_column(value, column)
end