檢測Rails中不存在的動作的before_filter

Question

如何檢測到我在Rails中存在不存在的動作的before_filter？

class PostsController < ApplicationController 
    before_action :authorize_user, only: [:kreate] 

    def create 
    end 
end 

Answer 1

你不行。

這就是爲什麼你需要有測試用例。在這種情況下，他們可能會抓到它，因爲authorize_user不會觸發，因爲您由於拼寫錯誤而將其應用於不存在的操作。

Answer 2

這是一個直截了當的黑客攻擊，但我能想到的檢查過濾器的唯一方法是初始化。以下檢查控制器是否有使用不存在動作的前/後過濾器，並在出現異常消息時產生一個異常消息

# config/initializers/before_filters.rb 

# require all controllers 
Dir['app/controllers/*'].each do |path| 
    require path.split('/').last if path.include? '.rb' 
end 

# get array of all controllers 
controllers = ApplicationController.descendants 

controllers.each do |controller| 
    # get all filters for this controller 
    filters = controller._process_action_callbacks 

    # get all actions under this controller 
    actions = controller.action_methods.to_a 

    filters.each do |filter| 
    # get all action_conditions for this filter 
    action_conditions = filter.instance_variable_get(:@if) 

    # raise error message if action used in filter not in available controller actions 
    action_conditions.each do |action_condition| 
     if actions.none? {|action| action_condition.include? action } 
     message = "#{controller.name} has a #{filter.kind.to_s} filter with a non-existant action (#{action_condition.scan(/'([^']*)'/)[0][0]})" 
     raise message 
     end 
    end 
    end 
end