method

column_alias_for

v1.2.6 - Show latest stable - 0 notes - Class: ActiveRecord::Calculations::ClassMethods

1.0.0
1.1.6 (0)
1.2.6 (2)
2.0.3 (0)
2.1.0 (18)
2.2.1 (0)
2.3.8 (0)
3.0.0
3.0.9
3.1.0
3.2.1
3.2.8
3.2.13
4.0.2
4.1.8
4.2.1
4.2.7
4.2.9
5.0.0.1
5.1.7
5.2.3
6.0.0
6.1.3.1
6.1.7.7
7.0.0
7.1.3.2
7.1.3.4
What's this?

column_alias_for(*keys) private

Converts a given key to the value that the database adapter returns as 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 251
        def column_alias_for(*keys)
          connection.table_alias_for(keys.join(' ').downcase.gsub(/\*/, 'all').gsub(/\W+/, ' ').strip.gsub(/ +/, '_'))
        end

column_alias_for

Related methods