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Arelで足したカラムのAS付けが出来ない？

Rails

Posted at 2014-06-21

以下の方法でASで名づけたいんですが、出来ないのかな。

user_table = User.arel_table
(user_table[:a_count] + user_table[:b_count]).as("score")
> (user_table[:a_count] + user_table[:b_count]).as("score")
NoMethodError: undefined method `as' for #<Arel::Nodes::Grouping:0x007f7aeac179f8>

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