需要重构为新的Ruby 1.9哈希语法 [英] Need to refactor to the new Ruby 1.9 hash syntax

问题描述

我有一个食谱，其中包含以下代码，该代码无法通过棉绒测试:

I have a recipe that has the following code that is failing a lint test:

service 'apache' do
  supports :status => true, :restart => true, :reload => true
end

失败，并显示以下错误:

It fails with the error:

Use the new Ruby 1.9 hash syntax.
  supports :status => true, :restart => true, :reload => true

不确定新语法是什么样的...任何人都可以提供帮助吗?

Not sure what the new syntax looks like... can anyone please assist?

推荐答案

在Ruby 1.9版中，为键为符号的哈希文字引入了新的语法.哈希使用哈希火箭"运算符来分隔键和值:

In the Ruby version 1.9 has been introduced a new syntax for hash literals whose keys are symbols. Hashes use the "hash rocket" operator to separate the key and the value:

a_hash = { :a_key => 'a_value' }

在Ruby 1.9中，此语法有效，但是只要键是符号，也可以将其写为:

In Ruby 1.9 this syntax is valid, but whenever the key is a symbol it's also possible to write it as:

a_hash = { a_key: 'a_value' }

正如Ruby样式指南所述，当您的哈希键是符号时，您应该更喜欢使用Ruby 1.9哈希文字语法

And as the Ruby style guide says, you should prefer to use the Ruby 1.9 hash literal syntax when your hash keys are symbols (see):

# bad
hash = { :one => 1, :two => 2, :three => 3 }

# good
hash = { one: 1, two: 2, three: 3 }

还有一个附加提示:不要在同一哈希文字中将Ruby 1.9哈希语法与哈希火箭混合使用.当您拥有不是符号的键时，请遵循哈希火箭的语法(请参阅):

And as an additional hint: Don't mix the Ruby 1.9 hash syntax with hash rockets in the same hash literal. When you've got keys that are not symbols stick to the hash rockets syntax (see):

# bad
{ a: 1, 'b' => 2 }

# good
{ :a => 1, 'b' => 2 }

因此您可以尝试:

service 'apache' do
  supports status: true, restart: true, reload: true
end

如果要查看Rubocop的方法"，可以在命令行中运行它，这将仅针对HashSyntax警告或标志自动校正代码:

If you want to see what's the Rubocop "way" you can run this in the command line, this will autocorrect your code only for the HashSyntax warnings or flags:

rubocop --only HashSyntax --auto-correct

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