method
perform_calculation
v3.2.1 -
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Class: ActiveRecord::Calculations
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perform_calculation(operation, column_name, options = {})
private
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# File activerecord/lib/active_record/relation/calculations.rb, line 188 def perform_calculation(operation, column_name, options = {}) operation = operation.to_s.downcase distinct = options[:distinct] if operation == "count" column_name ||= (select_for_count || :all) unless arel.ast.grep(Arel::Nodes::OuterJoin).empty? distinct = true end column_name = primary_key if column_name == :all && distinct distinct = nil if column_name =~ /\s*DISTINCT\s+/ end if @group_values.any? execute_grouped_calculation(operation, column_name, distinct) else execute_simple_calculation(operation, column_name, distinct) end end