Question

我正在执行rake文件中的任务。

# gottaRunThis.rake
task [:var] => :environment do |t, args|

    Foo::Bar::Bell::this_function(args.var)
    #runs Bell::this_function(var) but fails to complete.
    # errors out with the words:
    # NoMethodError: undefined method `put' for nil:NilClass
    # Because Bell needs a @connection variable that doesn't exist in
    # it's context when called directly.
end

问题是，目标模块和def应该包含在另一个类中。

# mainclass.rb
module Foo
  module Bar
    class TheMainClass
      include Foo::Bar::Bell
      def initialize
        @site = A_STATIC_SITE_VARIABLE
        @connection = self.connection
      end
      def connection
        # Connection info here, too verbose to type up
      end
    end
  end
end

Bell看起来像

# bell.rb
module Foo
  module Bar
    module Bell
    def do_the_thing(var)
      #things happen here
      #var converted to something here
      response = @connection.put "/some/restful/interface, var_converted
    end
  end
end

是否应该修改Bell，使其包含TheMainClass？（如果是这样，我不知道如何？）还是应该在我的rake文件中使用一些语法，例如

Foo::Bar::TheMainClass::Bell::do_the_thing(args.var)
#I don't think this works... should it? What would the equivilent but working version look like?

Answer 1

包含的方法可用作实例方法，因此您可以像这样调用do_the_thing：

main_class = Foo::Bar::TheMainClass.new
main_class.do_the_thing(args.var)

如何从rake调用类的包含的模块函数？

1 个答案: