可以选择性地缓存能力 [英] Can Can selectively cache abilities

问题描述

我知道要缓存整个 current_ability 。

类似

def current_ability
  cached_ability = Rails.cache.read("#{current_user.cache_key}::ability")
  if cached_ability.present?
    ability = Marshal.load( cached_ability )
  else
    ability = super
    Rails.cache.write("#{current_user.cache_key}::ability", Marshal.dump( ability ))
  end
  @current_ability = ability
end

但是，有没有一种方法可以缓存单个能力？例如，
就是这样：

But is there is a way to cache a single ability ? for example I do this :

Rails.cache.fetch("#{user.cache_key}::comments::ability") do
  can :manage, Comment, :article_id => articles_ids
end

推荐答案

我这样做是为了缓存整个 current_ability 对象

I did this to cache the whole current_ability object

在 ApplicationController

In ApplicationController

def current_ability
  @current_ability = Rails.cache.fetch("#{current_user.cache_key}::ability") do
    super
  end
end unless Rails.env.development?

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