I am testing this in local. My ip is 127.0.0.1. The ip_permissions table, is empty. When I browse the site, everything works as expected.

Now, I want to simulate browsing the site with a banned IP. So I add the IP into the ip_permissions table via:

IpPermission.create!(:ip => '127.0.0.1', :note => 'foobar', :category => 'blacklist')

In Rails console, I clear the cache via; Rails.cache.clear. I browse the site. I don't get sent to pages#blacklist.

If I restart the server. And browse the site, then I get sent to pages#blacklist. Why do I need to restart the server every time the ip_permissions table is updated? Shouldn't it fetch it based on cache?

Routes look like:

class BlacklistConstraint
  def initialize
    @blacklist = IpPermission.blacklist
  end

  def matches?(request)
    @blacklist.map { |b| b.ip }.include? request.remote_ip
  end
end

Foobar::Application.routes.draw do
  match '/(*path)' => 'pages#blacklist', :constraints => BlacklistConstraint.new
  ....
end

My model looks like:

class IpPermission < ActiveRecord::Base
  validates_presence_of :ip, :note, :category
  validates_uniqueness_of :ip, :scope => [:category]
  validates :category, :inclusion => { :in => ['whitelist', 'blacklist'] }

  def self.whitelist
    Rails.cache.fetch('whitelist', :expires_in => 1.month) { self.where(:category => 'whitelist').all }
  end

  def self.blacklist
    Rails.cache.fetch('blacklist', :expires_in => 1.month) { self.where(:category => 'blacklist').all }
  end
end