Rails 3 正在移除 Metal 吗？
Rails 3 正在移除 Metal 吗？
我正在尝试实现 Mongoid、Carrierwave 和 grid_fs。
我已遵循指南 1。
但是，我读到 Rails 3 正在删除 Metal ( http://github.com/rails/rails /commit/ed34652d1aca148fea61c5309c1bd5ff3a55abfa ）。
所以我偶然发现了这篇文章： 指南 2
考虑到 Rails 3 可能会删除 Metal 并用于将来的维护。哪个指南更适合让 grid_fs、Mongoid 和 Carrierwave 一起工作？
Is Rails 3 removing Metal?
I am trying to implement Mongoid, Carrierwave and grid_fs.
I have followed guide 1.
However, I have read that Rails 3 is removing Metal ( http://github.com/rails/rails/commit/ed34652d1aca148fea61c5309c1bd5ff3a55abfa ).
So I stumbled across this article instead: guide 2
Given the circumstances that Rails 3 may be removing Metal and for future maintenance. Which guide is more suitable to get grid_fs, Mongoid and Carrierwave all working together?
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您注意到带有注释“Removing Metal from Rails 3”的提交。然而，所发生的事情实际上与这句话完全相反！
Rails 3 没有移除金属。恰恰相反。现在，所有控制器都是金属，仅具有您要求的附加功能。您需要做的就是从
ActionController::Metal继承您的特定控制器类，然后包含提供您想要在该特定控制器中提供的附加功能的任何特定模块。当然，大多数人都会从
ActionController::Base继承他们的控制器。但现在，ActionController::Base仅继承ActionController::Metal并包含所有附加功能模块。您注意到的那个提交正在将金属作为一个单独功能删除，与
ActionPack的其余部分分开。现在，金属不再是一个单独功能，因此金属的单独功能实现被删除。现在，一切都是金属。You noticed a commit with the comment "Removing Metal from Rails 3." However, what is going on is actually quite the opposite of that phrase!
Rails 3 did not remove metal. Quite the opposite. Now, all controllers are metals, with only those additional features that you request. All you need to do is inherit your particular controller class from
ActionController::Metal, and thenincludeany particular modules that provide the additional features you want in that particular controller.Of course, most people will inherit their controllers from
ActionController::Base. But now,ActionController::Basemerely inheritsActionController::Metaland includes all of the additional feature modules.That commit you noticed is removing metals as a separate feature, apart from the rest of
ActionPack. Now, metals are no longer a separate feature, so the separate feature implementation of metals was removed. Now, everything is a metal.