Module: ActiveRecord::Calculations

Defined in:
lib/left_joins_for_rails_3.rb,
lib/left_joins.rb

Instance Method Summary collapse

Instance Method Details

#distinct_value ⇒ Object 



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# File 'lib/left_joins_for_rails_3.rb', line 13

def distinct_value
  uniq_value
end

#distinct_value=(v) ⇒ Object 



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# File 'lib/left_joins_for_rails_3.rb', line 17

def distinct_value=(v)
  self.uniq_value = v
end

#perform_calculation(operation, column_name, options = {}) ⇒ Object

This method is copied from activerecord-4.2.10/lib/active_record/relation/calculations.rb and modified this line ‘distinct = true` to `distinct = true if distinct == nil`



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# File 'lib/left_joins.rb', line 98

def perform_calculation(operation, column_name, options = {})
  # TODO: Remove options argument as soon we remove support to
  # activerecord-deprecated_finders.
  operation = operation.to_s.downcase

  # If #count is used with #distinct / #uniq it is considered distinct. (eg. relation.distinct.count)
  distinct = options[:distinct] || self.distinct_value

  if operation == "count"
    column_name ||= (select_for_count || :all)

    unless arel.ast.grep(Arel::Nodes::OuterJoin).empty?
      distinct = true if distinct == nil
    end

    column_name = primary_key if column_name == :all && distinct
    distinct = nil if column_name =~ /\s*DISTINCT[\s(]+/i
  end

  if group_values.any?
    execute_grouped_calculation(operation, column_name, distinct)
  else
    execute_simple_calculation(operation, column_name, distinct)
  end
end