method
build_count_subquery
v3.2.8 -
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
- 3.0.9
- 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 (0)
- 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 (0)
- 7.1.3.4 (0)
- What's this?
build_count_subquery(relation, column_name, distinct)
private
Hide source
# File activerecord/lib/active_record/relation/calculations.rb, line 352 def build_count_subquery(relation, column_name, distinct) column_alias = Arel.sql('count_column') subquery_alias = Arel.sql('subquery_for_count') aliased_column = aggregate_column(column_name == :all ? 1 : column_name).as(column_alias) relation.select_values = [aliased_column] subquery = relation.arel.as(subquery_alias) sm = Arel::SelectManager.new relation.engine select_value = operation_over_aggregate_column(column_alias, 'count', distinct) sm.project(select_value).from(subquery) end