def build_arel
arel = table
arel = build_joins(arel, @joins_values) unless @joins_values.empty?
(@where_values - ['']).uniq.each do |where|
where = Arel.sql(where) if String === where
arel = arel.where(Arel::Nodes::Grouping.new(where))
end
arel = arel.having(*@having_values.uniq.reject{|h| h.blank?}) unless @having_values.empty?
arel = arel.take(@limit_value) if @limit_value
arel = arel.skip(@offset_value) if @offset_value
arel = arel.group(*@group_values.uniq.reject{|g| g.blank?}) unless @group_values.empty?
arel = arel.order(*@order_values.uniq.reject{|o| o.blank?}) unless @order_values.empty?
arel = build_select(arel, @select_values.uniq)
arel = arel.from(@from_value) if @from_value
arel = arel.lock(@lock_value) if @lock_value
arel
end