ruby – Sinatra方法`开发？`undefined

您需要在“内部”继承自Sinatra :: Base的类(例如继承自Base的Sinatra :: Application)才能使用该开发？方法,在base.rb中定义.

在经典的Sinatra应用程序中,您已经在“内部”编写了一个继承自Sinatra :: Base的类.那么发展呢？只会在“任何地方”工作.

在模块化的Sinatra开发中？只能在Sinatra :: Base子类中使用,例如：

require 'sinatra/base'

# Placing
# require 'dm-sqlite-adapter' if development?
# here will not work.

class ApplicationController < Sinatra::Base
require 'dm-sqlite-adapter' if development? # But here it works
...
end

# Placing 
# require 'dm-sqlite-adapter' if development?` 
# AFTER the above class will still not work

class SomethingElse 
# nor will `development?` work here,since it is called inside
# a class without Sinatra::Base inheritance
...
end

所以基本上你可以使用继承自Sinatra :: Base的ApplicationController类,并在这里检查开发？从ApplicationController类继承的子类也是如此：

class UserController < ApplicationController
  require 'dotenv' if development?
  ...
end

对于模块化的Sinatra,在(主要：对象)代码文本“外部”Sinatra :: Base子类中,您需要遵循Arup’s指令：

if Sinatra::Base.environment == :development
    require 'awesome_print'
    require 'dotenv'
    Dotenv.load
    ...
end