Flowdock
method

build_count_subquery

Importance_0
build_count_subquery(relation, column_name, distinct) private

No documentation

This method has no description. You can help the Ruby on Rails community by adding new notes.

Hide source 
# File activerecord/lib/active_record/relation/calculations.rb, line 470
      def build_count_subquery(relation, column_name, distinct)
        if column_name == :all
          column_alias = Arel.star
          relation.select_values = [ Arel.sql(FinderMethods::ONE_AS_ONE) ] unless distinct
        else
          column_alias = Arel.sql("count_column")
          relation.select_values = [ aggregate_column(column_name).as(column_alias) ]
        end

        subquery_alias = Arel.sql("subquery_for_count")
        select_value = operation_over_aggregate_column(column_alias, "count", false)

        relation.build_subquery(subquery_alias, select_value)
      end
Register or log in to add new notes.