Rails.env在Rails 2中未定义 [英] Rails.env undefined in Rails 2
问题描述
我有一个运行Ruby on Rails 2.2的旧应用程序,并且我无法使用gem工作,因为它无法使用 Rails.env
:
$ script / console
>> Rails.env
NoMethodError:未定义的方法`env'for Rails:Module $ b $ from(irb):1
定义 Rails
时,gem设置为使用 Rails.env
, RAILS_ENV
,当它不是。但是我似乎有一个没有 env
方法的 Rails
对象(尽管我读了Rails 2中添加的方法)。任何想法是怎么回事?
Rails
在轨道中。这在3中并不新鲜,因此检查它是否被定义是错误的方法。确定是否可以使用 Rails.env
的正确方法是执行 Rails.respond_to? :env
。
I have an older application running Ruby on Rails 2.2, and I'm having trouble getting a gem to work because it can't find the current environment with Rails.env
:
$ script/console
>> Rails.env
NoMethodError: undefined method `env' for Rails:Module
from (irb):1
The gem is set up to use Rails.env
when Rails
is defined, and RAILS_ENV
when it's not. But I seem to have a Rails
object without an env
method (even though I read that method was added in Rails 2). Any idea what's going on?
The Rails
module has always been in rails. It is not new in 3, so checking to see if it's defined is the wrong way to go about things. The correct way to determine if you can use Rails.env
is to do Rails.respond_to? :env
.
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