Rails缓存:过时了吗?在开发中始终返回真实 [英] Rails caching: stale? always returns true in development

问题描述

在我的个人模型中，遵循 hawkins.io :

Following hawkins.io in my person model I have:

def self.cache_key
   Digest::MD5.hexdigest "#{maximum(:updated_at)}.try(:to_i)-#{count}"
end

我正在使用Pundit进行授权.因此，在我的人员控制器中，我有:

I am using Pundit for authorization. So in my people controller, I have:

def show
    @person = Person.find(params[:id])
    if authorize @person
      if stale? @person
        @person = Person.basic_details.last_details.find(params[:id]).decorate
        @person_histories = PersonHistory.new(person_id: @person.id).results
        respond_with @person
      end
    end
end

在我的development.rb环境中:

In my development.rb environment:

config.cache_store = :file_store, Rails.root.join('tmp', 'cache'), { expires_in: 4.hours }
config.consider_all_requests_local       = true
config.action_controller.perform_caching = true

(我在Windows上，因此没有memcached等设置).

(I'm on Windows here so don't have memcached etc setup).

当我重新加载人显示视图时，加载它后，我希望它会被完全缓存.但是它会重新查询数据库等.是否有设置或缺少的内容?当我检查缓存键时，它们是相同的，但是陈旧了吗?@person 似乎总是返回true.

When I reload the person show view, immediately after loading it, I would expect it to be fully cached. Yet it requeries the database etc etc. Is there a setting or something I am missing? When I check the cache keys they are the same, but stale? @person always appears to return true.

推荐答案

您尝试过吗?

禁用Rack :: MiniProfiler缓存

Disable Rack::MiniProfiler caching

Rack :: MiniProfiler中间件将删除与缓存相关的标头，因此，它是陈旧的吗?将始终返回TRUE.我们可以使用以下初始化程序完全禁用缓存:

Rack::MiniProfiler middleware will remove headers related to caching and as such, stale? will ALWAYS RETURN TRUE. We can disable caching altogether using the following initializer:

Rack::MiniProfiler.config.disable_caching = false

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