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Class: AbstractController::Base

Relationships & Source Files
Extension / Inclusion / Inheritance Descendants
Subclasses:
ActionController::API, ActionController::Base, ActionController::Metal, ActionMailer::Base, Rails::ApplicationController, Rails::HealthController, Rails::InfoController, Rails::MailersController, Rails::PwaController, Rails::WelcomeController, ActionView::TestCase::TestController
Super Chains via Extension / Inclusion / Inheritance
Class Chain:
self, ::ActiveSupport::DescendantsTracker
Instance Chain:
self, ::ActiveSupport::Configurable
Inherits: Object
Defined in: actionpack/lib/abstract_controller/base.rb

Overview

Base is a low-level API. Nobody should be using it directly, and subclasses (like ::ActionController::Base) are expected to provide their own render method, since rendering means different things depending on the context.

Class Attribute Summary

Class Method Summary

::ActiveSupport::DescendantsTracker - Extended

descendants

Instance Attribute Summary

Instance Method Summary

::ActiveSupport::Configurable - Included

#config

Reads and writes attributes from a configuration OrderedOptions.

Class Attribute Details

.abstract? (readonly)

Alias for .abstract.

[ GitHub ] 

  


# File 'actionpack/lib/abstract_controller/base.rb', line 55



alias_method :abstract?, :abstract


  








  

    .supports_path?  ⇒ Boolean  (readonly)
  



  

    

Returns true if the given controller is capable of rendering a path. A subclass of Base may return false. An Email controller for example does not support paths, only full URLs.


  





  


  [ GitHub ]


  

  


# File 'actionpack/lib/abstract_controller/base.rb', line 189



def self.supports_path?
  true
end


  







Class Method Details



  

    .abstract   (readonly)
    Also known as: .abstract?
  

  [ GitHub ]


  

  


# File 'actionpack/lib/abstract_controller/base.rb', line 54



attr_reader :abstract


  








  

    .abstract!  
  



  

    

Define a controller as abstract. See internal_methods for more details.


  



  [ GitHub ]


  

  


# File 'actionpack/lib/abstract_controller/base.rb', line 58



def abstract!
  @abstract = true
end


  








  

    .action_methods  
  



  

    

A Set of method names that should be considered actions. This includes all public instance methods on a controller, less any internal methods (see internal_methods), adding back in any methods that are internal, but still exist on the class itself.


  



  [ GitHub ]


  

  


# File 'actionpack/lib/abstract_controller/base.rb', line 93



def action_methods
  @action_methods ||= begin
    # All public instance methods of this class, including ancestors except for
    # public instance methods of Base and its ancestors.
    methods = public_instance_methods(true) - internal_methods
    # Be sure to include shadowed public instance methods of this class.
    methods.concat(public_instance_methods(false))
    methods.map!(&:to_s)
    methods.to_set
  end
end


  








  

    .clear_action_methods!  
  



  

    

action_methods are cached and there is sometimes a need to refresh them. .clear_action_methods! allows you to do that, so next time you run action_methods, they will be recalculated.


  



  [ GitHub ]


  

  


# File 'actionpack/lib/abstract_controller/base.rb', line 108



def clear_action_methods!
  @action_methods = nil
end


  








  

    .controller_path  
  



  

    

Returns the full controller name, underscored, without the ending Controller.



class MyApp::MyPostsController < AbstractController::Base

end

MyApp::MyPostsController.controller_path # => "my_app/my_posts"


  



  [ GitHub ]


  

  


# File 'actionpack/lib/abstract_controller/base.rb', line 120



def controller_path
  @controller_path ||= name.delete_suffix("Controller").underscore unless anonymous?
end


  








  

    .internal_methods  
  



  

    

A list of all internal methods for a controller. This finds the first abstract superclass of a controller, and gets a list of all public instance methods on that abstract class. Public instance methods of a controller would normally be considered action methods, so methods declared on abstract classes are being removed. (ActionController::Metal and ::ActionController::Base are defined as abstract)


  



  [ GitHub ]


  

  


# File 'actionpack/lib/abstract_controller/base.rb', line 77



def internal_methods
  controller = self
  methods = []

  until controller.abstract?
    methods += controller.public_instance_methods(false)
    controller = controller.superclass
  end

  controller.public_instance_methods(true) - methods
end


  








  

    .method_added(name)  
  



  

    

Refresh the cached action_methods when a new action_method is added.


  



  [ GitHub ]


  

  


# File 'actionpack/lib/abstract_controller/base.rb', line 125



def method_added(name)
  super
  clear_action_methods!
end


  







Instance Attribute Details



  

    #action_name   (rw)
  



  

    

Returns the name of the action this controller is processing.


  



  [ GitHub ]


  

  


# File 'actionpack/lib/abstract_controller/base.rb', line 44



attr_internal :action_name


  








  

    #formats   (rw)
  



  

    

Returns the formats that can be processed by the controller.


  



  [ GitHub ]


  

  


# File 'actionpack/lib/abstract_controller/base.rb', line 48



attr_internal :formats


  








  

    #performed?  ⇒ Boolean  (readonly)
  



  

    

Tests if a response body is set. Used to determine if the #process_action callback needs to be terminated in Callbacks.


  





  


  [ GitHub ]


  

  


# File 'actionpack/lib/abstract_controller/base.rb', line 182



def performed?
  response_body
end


  








  

    #response_body   (rw)
  



  

    

Returns the body of the HTTP response sent by the controller.


  



  [ GitHub ]


  

  


# File 'actionpack/lib/abstract_controller/base.rb', line 40



attr_internal :response_body


  







Instance Method Details



  

    #action_methods  
  



  

    

Delegates to the class’s .action_methods.


  



  [ GitHub ]


  

  


# File 'actionpack/lib/abstract_controller/base.rb', line 161



def action_methods
  self.class.action_methods
end


  








  

    #available_action?(action_name)  ⇒ Boolean 
  



  

    
Returns true if a method for the action is available and can be dispatched,
false otherwise.



Notice that action_methods.include?("foo") may return false and
available_action?("foo") returns true because this method considers actions
that are also available through other means, for example, implicit render
ones.



Parameters




  





  


  [ GitHub ]


  

  


# File 'actionpack/lib/abstract_controller/base.rb', line 176



def available_action?(action_name)
  _find_action_name(action_name)
end


  








  

    #controller_path  
  



  

    

Delegates to the class’s .controller_path.


  



  [ GitHub ]


  

  


# File 'actionpack/lib/abstract_controller/base.rb', line 156



def controller_path
  self.class.controller_path
end


  








  

    #process(action)  
  



  

    

Calls the action going through the entire Action Dispatch stack.



The actual method that is called is determined by calling #method_for_action. If no method can handle the action, then an ActionNotFound error is raised.


  



  [ GitHub ]


  

  


# File 'actionpack/lib/abstract_controller/base.rb', line 143



def process(action, ...)
  @_action_name = action.to_s

  unless action_name = _find_action_name(@_action_name)
    raise ActionNotFound.new("The action '#{action}' could not be found for #{self.class.name}", self, action)
  end

  @_response_body = nil

  process_action(action_name, ...)
end