rescue_from :: AbstractController :: ActionNotFound无效

Question

I have the following code:

unless Rails.application.config.consider_all_requests_local
  rescue_from Exception, with: :render_exception
  rescue_from ActiveRecord::RecordNotFound, with: :render_exception
  rescue_from ActionController::UnknownController, with: :render_exception
  rescue_from ::AbstractController::ActionNotFound, with: :render_exception
  rescue_from ActiveRecord::ActiveRecordError, with: :render_exception
  rescue_from NoMethodError, with: :render_exception
end

They all work flawless, except ::AbstractController::ActionNotFound

I've also tried

AbstractController::ActionNotFound
ActionController::UnknownAction

error:

   AbstractController::ActionNotFound (The action 'show' could not be found for ProductsController):

Answer 1

This similar question suggests that you can no longer catch an ActionNotFound exception. Check the link for workarounds. This suggestion to use a Rack middleware to catch 404s looks the cleanest to me.

Answer 2

To rescue AbstractController::ActionNotFound in a controller, you can try something like this:

class UsersController < ApplicationController

  private

  def process(action, *args)
    super
  rescue AbstractController::ActionNotFound
    respond_to do |format|
      format.html { render :404, status: :not_found }
      format.all { render nothing: true, status: :not_found }
    end
  end


  public

  # actions must not be private

end

This overrides the process method of AbstractController::Base that raises AbstractController::ActionNotFound (see source ).

Answer 3

I think we should catch AbstractController::ActionNotFound in ApplicationController . I have tried following that does not appears to be working .

rescue_from ActionController::ActionNotFound, with: :action_not_found

I have found much cleaner way to handle this exception in ApplicationController . To handle the ActionNotFound Exception in your application, you have to override the action_missing method in your application controller.

def action_missing(m, *args, &block)
  Rails.logger.error(m)
  redirect_to not_found_path # update your application 404 path here
end

Solution Adapted from: coderwall handling exceptions in your rails application

Answer 4

Overriding process , as described by Grégoire in his answer, seems to work. However, the Rails code says to instead override process_action . That doesn't work, though, because process_action never gets called due to the check for action_name in process .

https://github.com/rails/rails/blob/v3.2.21/actionpack/lib/abstract_controller/base.rb#L115

https://github.com/rails/rails/blob/v3.2.21/actionpack/lib/abstract_controller/base.rb#L161