Ruby-on-rails 从另一个控制器调用方法
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Calling a method from another controller
提问by cjm2671
If I've got a method in a different controller to the one I'm writing in, and I want to call that method, is it possible, or should I consider moving that method to a helper?
如果我在与我正在编写的控制器不同的控制器中有一个方法，并且我想调用该方法，是否有可能，或者我应该考虑将该方法移至助手？
回答by edgerunner
You could technically create an instance of the other controller and call methods on that, but it is tedious, error prone and highly not recommended.
从技术上讲，您可以创建另一个控制器的实例并在其上调用方法，但它很乏味、容易出错并且极不推荐。
If that function is common to both controllers, you should probably have it in ApplicationControlleror another superclass controller of your creation.
如果该功能对两个控制器都是通用的，您可能应该在ApplicationController您创建的另一个超类控制器中使用它。
class ApplicationController < ActionController::Base
def common_to_all_controllers
# some code
end
end
class SuperController < ApplicationController
def common_to_some_controllers
# some other code
end
end
class MyController < SuperController
# has access to common_to_all_controllers and common_to_some_controllers
end
class MyOtherController < ApplicationController
# has access to common_to_all_controllers only
end
Yet another way to do it as jimwormsuggested, is to use a module for the common functionality.
按照jimworm 的建议，另一种方法是使用一个模块来实现通用功能。
# lib/common_stuff.rb
module CommonStuff
def common_thing
# code
end
end
# app/controllers/my_controller.rb
require 'common_stuff'
class MyController < ApplicationController
include CommonStuff
# has access to common_thing
end
回答by Joseph Le Brech
Try and progressively move you methods to your models, if they don't apply to a model then a helper and if it still needs to be accessed elsewhere put in the ApplicationController
尝试逐步将您的方法移动到您的模型中，如果它们不适用于模型然后是一个助手，并且如果它仍然需要在 ApplicationController 中的其他地方访问
回答by zachar
I don't know any details of your problem, but maybe paths could be solution in your case (especially if its RESTful action).
我不知道您的问题的任何详细信息，但在您的情况下，路径可能是解决方案（特别是如果它的 RESTful 操作）。
http://guides.rubyonrails.org/routing.html#path-and-url-helpers
http://guides.rubyonrails.org/routing.html#path-and-url-helpers
回答by Rahul Goyal
If you requirement has to Do with some DB operations, then you can write a common function (class method) inside that Model. Functions defined inside model are accessible across to all the controllers. But this solution does to apply to all cases.
如果您需要做一些数据库操作，那么您可以在该模型中编写一个通用函数（类方法）。所有控制器都可以访问模型内部定义的函数。但是这个解决方案确实适用于所有情况。
