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rails--rails/actionpack/lib/abstract_controller/base.rb
@schneems and @sgrif 2bbcca004c Deprecate *_path methods in mailers
Email does not support relative links since there is no implicit host. Therefore all links inside of emails must be fully qualified URLs. All path helpers are now deprecated. When removed, the error will give early indication to developers to use `*_url` methods instead.

Currently if a developer uses a `*_path` helper, their tests and `mail_view` will not catch the mistake. The only way to see the error is by sending emails in production. Preventing sending out emails with non-working path's is the desired end goal of this PR.

Currently path helpers are mixed-in to controllers (the ActionMailer::Base acts as a controller). All `*_url` and `*_path` helpers are made available through the same module. This PR separates this behavior into two modules so we can extend the `*_path` methods to add a Deprecation to them. Once deprecated we can use this same area to raise a NoMethodError and add an informative message directing the developer to use `*_url` instead.

The module with warnings is only mixed in when a controller returns false from the newly added `supports_relative_path?`.

Paired @sgrif & @schneems
2014-07-30 12:01:45 -05:00

269 lines
9.6 KiB
Ruby

require 'erubis'
require 'set'
require 'active_support/configurable'
require 'active_support/descendants_tracker'
require 'active_support/core_ext/module/anonymous'
module AbstractController
class Error < StandardError #:nodoc:
end
# Raised when a non-existing controller action is triggered.
class ActionNotFound < StandardError
end
# <tt>AbstractController::Base</tt> 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
attr_internal :response_body
attr_internal :action_name
attr_internal :formats
include ActiveSupport::Configurable
extend ActiveSupport::DescendantsTracker
undef_method :not_implemented
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.
# (ActionController::Metal and ActionController::Base are defined as abstract)
def internal_methods
controller = self
controller = controller.superclass until controller.abstract?
controller.public_instance_methods(true)
end
# The list of hidden actions. Defaults to an empty array.
# This can be modified by other modules or subclasses
# to specify particular actions as hidden.
#
# ==== Returns
# * <tt>Array</tt> - An array of method names that should not be considered actions.
def hidden_actions
[]
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. Finally, #hidden_actions are removed.
#
# ==== 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)).uniq.map { |x| x.to_s } -
# And always exclude explicitly hidden actions
hidden_actions.to_a
# Clear out AS callback method pollution
Set.new(methods.reject { |method| method =~ /_one_time_conditions/ })
end
end
# action_methods are cached and there is sometimes 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.
# For instance, MyApp::MyPostsController would return "my_app/my_posts" for
# controller_path.
#
# ==== Returns
# * <tt>String</tt>
def controller_path
@controller_path ||= name.sub(/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, "The action '#{action}' could not be found for #{self.class.name}"
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
#
# ==== Returns
# * <tt>TrueClass</tt>, <tt>FalseClass</tt>
def available_action?(action_name)
_find_action_name(action_name).present?
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
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
#
# ==== Returns
# * <tt>TrueClass</tt>, <tt>FalseClass</tt>
#
# :api: private
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