ruby - Ruby代码美化，将长指令拆分成多行

我们如何编写以下语句来提高可读性？

Promotion.joins(:category).where(["lft>=? and rgt<=?", c.lft, c.rgt]).joins(:shops).where(:promotions_per_shops => { :shop_id => shops_id }).count('id', :distinct => true)

以下内容无法编译

Promotion.joins(:category)
         .where(["lft>=? and rgt<=?", c.lft, c.rgt])
         .joins(:shops)
         .where(:promotions_per_shops => { :shop_id => shops_id })
         .count('id', :distinct => true)

syntax error, unexpected '.', expecting kEND
                     .where(["lft>=? and rgt<=?", c.lft, c.rgt])

最佳答案

像这样做:

Promotion.joins(:category).
         where(["lft>=? and rgt<=?", c.lft, c.rgt]).
         joins(:shops).
         where(:promotions_per_shops => { :shop_id => shops_id }).
         count('id', :distinct => true)

关于ruby - Ruby代码美化，将长指令拆分成多行，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/7359948/