column_alias_for(*keys) — ActiveRecord::Calculations::ClassMethods

column_alias_for(*keys)

Converts the given keys to the value that the database adapter returns as a usable column name:

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

Parameters

keys rest

Source

# File activerecord/lib/active_record/calculations.rb, line 287
        def column_alias_for(*keys)
          table_name = keys.join(' ')
          table_name.downcase!
          table_name.gsub!(/\*/, 'all')
          table_name.gsub!(/\W+/, ' ')
          table_name.strip!
          table_name.gsub!(/ +/, '_')

          connection.table_alias_for(table_name)
        end

Defined in activerecord/lib/active_record/calculations.rb line 287 · View on GitHub · Improve this page · Find usages on GitHub

Defined in ActiveRecord::Calculations::ClassMethods

Signature

Parameters