adding sum to sql literal

5d11fa9f · Aaron Patterson · 37620b0c · 5d11fa9f
隐藏空白更改
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lib/arel/nodes/sql_literal.rb lib/arel/nodes/sql_literal.rb +4 -0

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--- a/lib/arel/nodes/sql_literal.rb
+++ b/lib/arel/nodes/sql_literal.rb
@@ -5,6 +5,10 @@ def count distinct = false
        Count.new [self], distinct
      end

+      def sum
+        Nodes::Sum.new [self], Nodes::SqlLiteral.new('sum_id')
+      end
+
      def maximum
        Nodes::Max.new [self], Nodes::SqlLiteral.new('max_id')
      end