method

column_alias_for

v2.0.3 - Show latest stable - 0 notes - Class: ActiveRecord::Calculations::ClassMethods

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What's this?

column_alias_for(*keys) private

Converts a given key to the value that the database adapter returns as a usable column name.

  users.id #=> users_id
  sum(id) #=> sum_id
  count(distinct users.id) #=> count_distinct_users_id
  count(*) #=> count_all

Show source

# File activerecord/lib/active_record/calculations.rb, line 249
        def column_alias_for(*keys)
          connection.table_alias_for(keys.join(' ').downcase.gsub(/\*/, 'all').gsub(/\W+/, ' ').strip.gsub(/ +/, '_'))
        end

column_alias_for

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