Abstract Controller Base

AbstractController::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.

Methods

Included Modules

Attributes

[R] abstract
[R] abstract?

Class Public methods

abstract!()

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

πŸ“ Source code 
# File actionpack/lib/abstract_controller/base.rb, line 57
      def abstract!
        @abstract = true
      end
πŸ”Ž See on GitHub

action_methods()

A list 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.

Returns

  • Set - A set of all methods that should be considered actions.

πŸ“ Source code 
# File actionpack/lib/abstract_controller/base.rb, line 96
      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
πŸ”Ž See on GitHub

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.

πŸ“ Source code 
# File actionpack/lib/abstract_controller/base.rb, line 111
      def clear_action_methods!
        @action_methods = nil
      end
πŸ”Ž See on GitHub

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"

Returns

  • String

πŸ“ Source code 
# File actionpack/lib/abstract_controller/base.rb, line 125
      def controller_path
        @controller_path ||= name.delete_suffix("Controller").underscore unless anonymous?
      end
πŸ”Ž See on GitHub

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)

πŸ“ Source code 
# File actionpack/lib/abstract_controller/base.rb, line 76
      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
πŸ”Ž See on GitHub

method_added(name)

Refresh the cached action_methods when a new action_method is added.

πŸ“ Source code 
# File actionpack/lib/abstract_controller/base.rb, line 130
      def method_added(name)
        super
        clear_action_methods!
      end
πŸ”Ž See on GitHub

supports_path?()

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

πŸ“ Source code 
# File actionpack/lib/abstract_controller/base.rb, line 199
    def self.supports_path?
      true
    end
πŸ”Ž See on GitHub

Instance Public methods

action_methods()

Delegates to the class’s ::action_methods.

πŸ“ Source code 
# File actionpack/lib/abstract_controller/base.rb, line 170
    def action_methods
      self.class.action_methods
    end
πŸ”Ž See on GitHub

action_name

Returns the name of the action this controller is processing.

πŸ“ Source code 
# File actionpack/lib/abstract_controller/base.rb, line 42
    attr_internal :action_name
πŸ”Ž See on GitHub

available_action?(action_name)

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

  • action_name - The name of an action to be tested

πŸ“ Source code 
# File actionpack/lib/abstract_controller/base.rb, line 184
    def available_action?(action_name)
      _find_action_name(action_name)
    end
πŸ”Ž See on GitHub

controller_path()

Delegates to the class’s ::controller_path.

πŸ“ Source code 
# File actionpack/lib/abstract_controller/base.rb, line 165
    def controller_path
      self.class.controller_path
    end
πŸ”Ž See on GitHub

formats

Returns the formats that can be processed by the controller.

πŸ“ Source code 
# File actionpack/lib/abstract_controller/base.rb, line 46
    attr_internal :formats
πŸ”Ž See on GitHub

performed?()

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

πŸ“ Source code 
# File actionpack/lib/abstract_controller/base.rb, line 191
    def performed?
      response_body
    end
πŸ”Ž See on GitHub

process(action, *args)

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 AbstractController::ActionNotFound error is raised.

Returns

  • self

πŸ“ Source code 
# File actionpack/lib/abstract_controller/base.rb, line 151
    def process(action, *args)
      @_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, *args)
    end
πŸ”Ž See on GitHub

response_body

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

πŸ“ Source code 
# File actionpack/lib/abstract_controller/base.rb, line 38
    attr_internal :response_body
πŸ”Ž See on GitHub