method

column_alias_for

v3.0.0 - Show latest stable - 0 notes - Class: ActiveRecord::Calculations

1.0.0
1.1.6
1.2.6
2.0.3
2.1.0
2.2.1
2.3.8
3.0.0 (0)
3.0.9 (-2)
3.1.0 (0)
3.2.1 (0)
3.2.8 (0)
3.2.13 (0)
4.0.2 (0)
4.1.8 (0)
4.2.1 (0)
4.2.7 (0)
4.2.9 (0)
5.0.0.1 (-7)
5.1.7 (0)
5.2.3 (0)
6.0.0 (0)
6.1.3.1 (0)
6.1.7.7 (0)
7.0.0 (0)
7.1.3.2
7.1.3.4
What's this?

column_alias_for(*keys) private

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"

Show source

# File activerecord/lib/active_record/relation/calculations.rb, line 246
    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!(/ +/, '_')

      @klass.connection.table_alias_for(table_name)
    end

column_alias_for

Related methods