ruby Ruby代码美化，多行拆分长指令
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时间：2020-09-06 04:19:22 来源:igfitidea点击:
Ruby code beautification, split long instructions on multiple lines
提问by EricLarch
How can we write the following statement to improve readability?
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)
The following doesn't compile
以下不编译
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])
回答by EricLarch
Also possible to do
也可以做
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)
回答by Geo
Do it like this:
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)
回答by Mchl
It should compile in 1.9. In previous versions it was invalid indeed.
它应该在 1.9 中编译。在以前的版本中它确实无效。
