Rails Tutorial: before_filter deprecated

Section 10.2.1 of the Rails Tutorial utilizes before_filter which is deprecated. What's the modern idiomatic way to write the code in UsersController so as to not use before_filter?

Here's a version of edit that I tried:

  def edit
    if ( signed_in? )
      @title = "Edit user"
    else
      de开发者_StackOverflow社区ny_access
    end
  end

However, this triggers 2 failures in when I run rspec.

rspec ./spec/requests/friendly_forwardings_spec.rb:6 # FriendlyForwardings should forward to the requested page after signin
rspec ./spec/controllers/users_controller_spec.rb:266 # UsersController authentication of edit/update pages for non-signed-in users should deny access to 'edit'

before_filter isn't deprecated. You may be confused because the definition was moved to AbstractController::Callbacks from ActionController::Filters::ClassMethods in Rails 3, but it's still very much alive and kicking.

Here it is defined, deprecation-free, in Rails 3.1:
https://github.com/rails/rails/blob/v3.1.0.rc6/actionpack/lib/abstract_controller/callbacks.rb#L80

Here's the version of edit which doesn't depend on before_filter and allows for the specs to pass:

  def edit
    if ( current_user )
      @user = User.find(params[:id])
      if ( current_user?(@user) )
        @title = "Edit user"
      else
        redirect_to(root_path)
      end
    else
      session[:return_to] = request.fullpath
      redirect_to("/signin" , :notice => "Please sign in to access this page.")
    end
  end

The original one I posted in the question didn't incorporate correct_user.

This answer is just to point to the right solution these days.

before_filter is deprecated in Rails 4.2, from the release notes:

The *_filter family of methods have been removed from the documentation. Their usage is discouraged in favor of the *_action family of methods:

There is a similar question: Rails 4: before_filter vs. before_action.

Rails CallBacks - ActionController::Base, before_action is just a new syntax for before_filter.

However, all before_filters are deprecated in Rails 5.0 and will be removed in Rails 5.1

It is just a name change. before_action is more specific because it gets executed before an action.