mirror of
https://github.com/rails/rails.git
synced 2022-11-09 12:12:34 -05:00
5f45aeaaae
Like all others for corrections already does.
285 lines
10 KiB
Ruby
285 lines
10 KiB
Ruby
# frozen_string_literal: true
|
|
|
|
require "abstract_controller/error"
|
|
require "active_support/configurable"
|
|
require "active_support/descendants_tracker"
|
|
require "active_support/core_ext/module/anonymous"
|
|
require "active_support/core_ext/module/attr_internal"
|
|
|
|
module AbstractController
|
|
# Raised when a non-existing controller action is triggered.
|
|
class ActionNotFound < StandardError
|
|
attr_reader :controller, :action # :nodoc:
|
|
|
|
def initialize(message = nil, controller = nil, action = nil) # :nodoc:
|
|
@controller = controller
|
|
@action = action
|
|
super(message)
|
|
end
|
|
|
|
if defined?(DidYouMean::Correctable) && defined?(DidYouMean::SpellChecker)
|
|
include DidYouMean::Correctable # :nodoc:
|
|
|
|
def corrections # :nodoc:
|
|
@corrections ||= DidYouMean::SpellChecker.new(dictionary: controller.class.action_methods).correct(action)
|
|
end
|
|
end
|
|
end
|
|
|
|
# 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.
|
|
class Base
|
|
##
|
|
# Returns the body of the HTTP response sent by the controller.
|
|
attr_internal :response_body
|
|
|
|
##
|
|
# Returns the name of the action this controller is processing.
|
|
attr_internal :action_name
|
|
|
|
##
|
|
# Returns the formats that can be processed by the controller.
|
|
attr_internal :formats
|
|
|
|
include ActiveSupport::Configurable
|
|
extend ActiveSupport::DescendantsTracker
|
|
|
|
class << self
|
|
attr_reader :abstract
|
|
alias_method :abstract?, :abstract
|
|
|
|
# Define a controller as abstract. See internal_methods for more
|
|
# details.
|
|
def abstract!
|
|
@abstract = true
|
|
end
|
|
|
|
def inherited(klass) # :nodoc:
|
|
# Define the abstract ivar on subclasses so that we don't get
|
|
# uninitialized ivar warnings
|
|
unless klass.instance_variable_defined?(:@abstract)
|
|
klass.instance_variable_set(:@abstract, false)
|
|
end
|
|
super
|
|
end
|
|
|
|
# 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.
|
|
# (<tt>ActionController::Metal</tt> and ActionController::Base are defined as abstract)
|
|
def internal_methods
|
|
controller = self
|
|
|
|
controller = controller.superclass until controller.abstract?
|
|
controller.public_instance_methods(true)
|
|
end
|
|
|
|
# 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
|
|
# * <tt>Set</tt> - A set of all methods that should be considered actions.
|
|
def action_methods
|
|
@action_methods ||= begin
|
|
# All public instance methods of this class, including ancestors
|
|
methods = (public_instance_methods(true) -
|
|
# Except for public instance methods of Base and its ancestors
|
|
internal_methods +
|
|
# Be sure to include shadowed public instance methods of this class
|
|
public_instance_methods(false))
|
|
|
|
methods.map!(&:to_s)
|
|
|
|
methods.to_set
|
|
end
|
|
end
|
|
|
|
# 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.
|
|
def clear_action_methods!
|
|
@action_methods = nil
|
|
end
|
|
|
|
# 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
|
|
# * <tt>String</tt>
|
|
def controller_path
|
|
@controller_path ||= name.delete_suffix("Controller").underscore unless anonymous?
|
|
end
|
|
|
|
# Refresh the cached action_methods when a new action_method is added.
|
|
def method_added(name)
|
|
super
|
|
clear_action_methods!
|
|
end
|
|
end
|
|
|
|
abstract!
|
|
|
|
# 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
|
|
# * <tt>self</tt>
|
|
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
|
|
|
|
# Delegates to the class' ::controller_path
|
|
def controller_path
|
|
self.class.controller_path
|
|
end
|
|
|
|
# Delegates to the class' ::action_methods
|
|
def action_methods
|
|
self.class.action_methods
|
|
end
|
|
|
|
# Returns true if a method for the action is available and
|
|
# can be dispatched, false otherwise.
|
|
#
|
|
# Notice that <tt>action_methods.include?("foo")</tt> may return
|
|
# false and <tt>available_action?("foo")</tt> returns true because
|
|
# this method considers actions that are also available
|
|
# through other means, for example, implicit render ones.
|
|
#
|
|
# ==== Parameters
|
|
# * <tt>action_name</tt> - The name of an action to be tested
|
|
def available_action?(action_name)
|
|
_find_action_name(action_name)
|
|
end
|
|
|
|
# Tests if a response body is set. Used to determine if the
|
|
# +process_action+ callback needs to be terminated in
|
|
# +AbstractController::Callbacks+.
|
|
def performed?
|
|
response_body
|
|
end
|
|
|
|
# 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.
|
|
def self.supports_path?
|
|
true
|
|
end
|
|
|
|
def inspect # :nodoc:
|
|
"#<#{self.class.name}:#{'%#016x' % (object_id << 1)}>"
|
|
end
|
|
|
|
private
|
|
# Returns true if the name can be considered an action because
|
|
# it has a method defined in the controller.
|
|
#
|
|
# ==== Parameters
|
|
# * <tt>name</tt> - The name of an action to be tested
|
|
def action_method?(name)
|
|
self.class.action_methods.include?(name)
|
|
end
|
|
|
|
# Call the action. Override this in a subclass to modify the
|
|
# behavior around processing an action. This, and not #process,
|
|
# is the intended way to override action dispatching.
|
|
#
|
|
# Notice that the first argument is the method to be dispatched
|
|
# which is *not* necessarily the same as the action name.
|
|
def process_action(method_name, *args)
|
|
send_action(method_name, *args)
|
|
end
|
|
|
|
# Actually call the method associated with the action. Override
|
|
# this method if you wish to change how action methods are called,
|
|
# not to add additional behavior around it. For example, you would
|
|
# override #send_action if you want to inject arguments into the
|
|
# method.
|
|
alias send_action send
|
|
|
|
# If the action name was not found, but a method called "action_missing"
|
|
# was found, #method_for_action will return "_handle_action_missing".
|
|
# This method calls #action_missing with the current action name.
|
|
def _handle_action_missing(*args)
|
|
action_missing(@_action_name, *args)
|
|
end
|
|
|
|
# Takes an action name and returns the name of the method that will
|
|
# handle the action.
|
|
#
|
|
# It checks if the action name is valid and returns false otherwise.
|
|
#
|
|
# See method_for_action for more information.
|
|
#
|
|
# ==== Parameters
|
|
# * <tt>action_name</tt> - An action name to find a method name for
|
|
#
|
|
# ==== Returns
|
|
# * <tt>string</tt> - The name of the method that handles the action
|
|
# * false - No valid method name could be found.
|
|
# Raise +AbstractController::ActionNotFound+.
|
|
def _find_action_name(action_name)
|
|
_valid_action_name?(action_name) && method_for_action(action_name)
|
|
end
|
|
|
|
# Takes an action name and returns the name of the method that will
|
|
# handle the action. In normal cases, this method returns the same
|
|
# name as it receives. By default, if #method_for_action receives
|
|
# a name that is not an action, it will look for an #action_missing
|
|
# method and return "_handle_action_missing" if one is found.
|
|
#
|
|
# Subclasses may override this method to add additional conditions
|
|
# that should be considered an action. For instance, an HTTP controller
|
|
# with a template matching the action name is considered to exist.
|
|
#
|
|
# If you override this method to handle additional cases, you may
|
|
# also provide a method (like +_handle_method_missing+) to handle
|
|
# the case.
|
|
#
|
|
# If none of these conditions are true, and +method_for_action+
|
|
# returns +nil+, an +AbstractController::ActionNotFound+ exception will be raised.
|
|
#
|
|
# ==== Parameters
|
|
# * <tt>action_name</tt> - An action name to find a method name for
|
|
#
|
|
# ==== Returns
|
|
# * <tt>string</tt> - The name of the method that handles the action
|
|
# * <tt>nil</tt> - No method name could be found.
|
|
def method_for_action(action_name)
|
|
if action_method?(action_name)
|
|
action_name
|
|
elsif respond_to?(:action_missing, true)
|
|
"_handle_action_missing"
|
|
end
|
|
end
|
|
|
|
# Checks if the action name is valid and returns false otherwise.
|
|
def _valid_action_name?(action_name)
|
|
!action_name.to_s.include? File::SEPARATOR
|
|
end
|
|
end
|
|
end
|