在控制器内动态调用方法

发布于 2024-09-15 04:02:48 字数 812 浏览 6 评论 0原文

我有以下场景,

我想向控制器动态添加方法。我所有的方法名称都在一个表中。请参考以下示例

-table (method_names)-

1 - Walk
2 - Speek
3 - Run

,我

class UsersController < ApplicationController

   def index

   end 

end

在这个索引操作中有一个控制器,我想动态调用我的方法。这些方法实际上是在其他软件中实现的。

我有另一个像

class ActionImplementController < ApplicationController

   def walk
     puts "I'm walking"
   end 

   def speek
     puts "I'm sppeking"
   end 

   def run
     puts "I'm running"
   end 


end  

** 这样的控制器,我做了类似下面的事情及其工作

class UsersController < ApplicationController

   def index
     a = eval("ActionImplementController.new.run")
   end 

end

,但我的问题是,这是正确的方法还是有其他方法可以做到这一点,

提前致谢,

欢呼

Sameera

I have the following scenario

I want to add methods dynamically to a controller. All my method names are in a table . Please refer the following example

-table (method_names)-

1 - Walk
2 - Speek
3 - Run

and I have a controller

class UsersController < ApplicationController

   def index

   end 

end

Inside this index action i want to call my methods dynamically. Those methods were actually implemented else ware.

I have another controller like

class ActionImplementController < ApplicationController

   def walk
     puts "I'm walking"
   end 

   def speek
     puts "I'm sppeking"
   end 

   def run
     puts "I'm running"
   end 


end  

** I have done something like below and its working

class UsersController < ApplicationController

   def index
     a = eval("ActionImplementController.new.run")
   end 

end

But my question is , is this the right way or is there anyother way to do this

Thanks in advance

cheers

sameera

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评论(2

悲歌长辞 2024-09-22 04:02:48

虽然第一个答案有效,但我更喜欢这样的东西

module ImplementsActions
  def run
    ...
  end

  def walk
    ..
  end

  def ...
end

,然后在你的控制器中编写

class UsersController < ActionController::Base

  include ImplementsActions

  # now you can just use run/speek/walk

  def index
    run
  end
end

更干净的代码,因为代码可以共享,但它是在你需要的地方定义的。

While the first answer works, i would prefer something like this

module ImplementsActions
  def run
    ...
  end

  def walk
    ..
  end

  def ...
end

and then in your controller write

class UsersController < ActionController::Base

  include ImplementsActions

  # now you can just use run/speek/walk

  def index
    run
  end
end

Much cleaner because the code can be shared, but it is defined where you need it.

遇见了你 2024-09-22 04:02:48

我认为通常最好避免使用 eval。如果可以的话,我将使所有方法都成为类方法,然后像这样运行它们:

def index
    ActionImplementController.send :run
    # ActionImplementController.new.send(:run) works if you can't use class methods
end

I think it's generally best to avoid the use of eval. If you can, I would make all your methods class methods and then run them like so:

def index
    ActionImplementController.send :run
    # ActionImplementController.new.send(:run) works if you can't use class methods
end
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