[英]Rails 3. Inheritance callback method in the controller
我有2个控制器
OauthController和Admin :: OauthController。 当Admin :: OauthController从OauthController继承时。
在OauthController中实现的方法“回调”是公开的。
Admin :: OauthController看起来像:
class Admin::OauthController < OauthController
end
然后,如果我转到链接“ / admin / facebook_oauth / callback”,则会出现错误
Unknown action
The action 'callback' could not be found for Admin::OauthController
但是,如果我在Admin :: OauthController中添加带有call super的'callback'方法,那么所有方法都可以使用。
class Admin::OauthController < OauthController
def callback
super
end
end
迁移到Rails 3后,将出现此行为。其他方法继承自OauthController,没有问题。
如果我们在“ action_methods”列表中没有所需的动作,则会引发错误“ raise ActionNotFound”
AbstractController :: Base#internal_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. Finally, #hidden_actions are removed.
#
# ==== Returns
# * <tt>array</tt> - A list 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).map { |m| m.to_s }.to_set -
# Except for public instance methods of Base and its ancestors
internal_methods.map { |m| m.to_s } +
# Be sure to include shadowed public instance methods of this class
public_instance_methods(false).map { |m| m.to_s } -
# And always exclude explicitly hidden actions
hidden_actions
# Clear out AS callback method pollution
methods.reject { |method| method =~ /_one_time_conditions/ }
end
end
不要进入最终列表“ AbstractController :: Base#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)
def internal_methods
controller = self
controller = controller.superclass until controller.abstract?
controller.public_instance_methods(true)
end
最后是最有趣的:
>> ActionController::Base.instance_methods.include?('callback')
=> true
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