我已经包含了给定的代码
def check_ip
start_ip = IPAddr.new(myip).to_i
end_ip = IPAddr.new(endip).to_i
ip_pool = IpTab.all
p '!!!!!!!!!!!!!!!!!!!!!!!'
p ip_pool
ip_pool.each do |ip|
low = IPAddr.new(ip.start_ip).to_i
high = IPAddr.new(ip.end_ip).to_i
p '-------------------------------'
p ((low..high)===start_ip)
p ((low..high)===start_ip)
p '******************************'
break if (low..high)===start_ip
break if (low..high)===end_ip
p '*******************************'
self.errors.add(:start_ip, I18n.t('errors.start_ip'))
end
end
我得到了输出:
"!!!!!!!!!!!!!!!!!!!!!!!"
IpPool Load (0.1ms) SELECT `ip_pools`.* FROM `ip_pools`
#<ActiveRecord::Relation [#<IpPool id: 1, start_ip: "10.10.10.10", end_ip: "10.10.10.20", user_id: 1, created_at: "2015-09-08 05:12:34", updated_at: "2015-09-08 05:12:34">, #<IpPool id: 4, start_ip: "11.12.12.13", end_ip: "11.12.12.16", user_id: 1, created_at: "2015-09-08 06:08:38", updated_at: "2015-09-08 06:08:38">]>
"-------------------------------"
true
true
"******************************"
但如果我的start_ip或end_ip位于数据库中给定的ips之间,则它不能正常工作,那么它不允许保存ip。即如果(low..high)===start_ip
或(low..high)===end_ip
为真,则不允许保存
指导我如何解决这个问题,因为我的代码不能正常工作,指导我如何编写这段代码。
答案 0 :(得分:3)
如果
(low..high)===start_ip
或if (low..high)===end_ip
为true
则不允许保存
你的循环不起作用。我们假设(low..high)===start_ip
是true
。你的循环变为:
ip_pool.each do |ip|
low = IPAddr.new(ip.start_ip).to_i
high = IPAddr.new(ip.end_ip).to_i
break if true # loop exits here
break if (low..high)===end_ip # not called
self.errors.add(:start_ip, I18n.t('errors.start_ip')) # not called either
end
如果if (low..high)===end_ip
为true
,则会变为:
ip_pool.each do |ip|
low = IPAddr.new(ip.start_ip).to_i
high = IPAddr.new(ip.end_ip).to_i
break if (low..high)===start_ip # nothing happens
break if true # loop exits here
self.errors.add(:start_ip, I18n.t('errors.start_ip')) # not called
end
无论哪种方式,self.errors.add
都不被调用。如果两个条件都是false
,那么 就会被调用,可能不是你想要的。
要解决您的问题,您可以写:
ip_pool.each do |ip|
low = IPAddr.new(ip.start_ip).to_i
high = IPAddr.new(ip.end_ip).to_i
if (low..high).include?(start_ip) || (low..high).include?(end_ip)
errors.add(:start_ip, I18n.t('errors.start_ip'))
break
end
end
或者有不同的错误:
ip_pool.each do |ip|
low = IPAddr.new(ip.start_ip).to_i
high = IPAddr.new(ip.end_ip).to_i
if (low..high).include?(start_ip)
errors.add(:start_ip, I18n.t('errors.start_ip'))
break
elsif (low..high).include?(end_ip)
errors.add(:end_ip, I18n.t('errors.end_ip'))
break
end
end
请注意,我已将rng===obj
替换为rng.include?(obj)
。
此外,我认为您的before_save :check_ip
应为validate :check_ip
,如Performing Custom Validations所示。该文档还说明了如何实现可应用于多个属性的EachValidator
。
答案 1 :(得分:1)
您真正需要做的是,在验证失败时返回false。我猜你应该试试这个
def check_ip
start_ip = IPAddr.new(self.start_ip).to_i
end_ip = IPAddr.new(self.end_ip).to_i
ip_pool = IpPool.all
p '!!!!!!!!!!!!!!!!!!!!!!!'
p ip_pool
begin
ip_pool.each do |ip|
low = IPAddr.new(ip.start_ip).to_i
high = IPAddr.new(ip.end_ip).to_i
p '-------------------------------'
p ((low..high)===start_ip)
p ((low..high)===start_ip)
p '******************************'
raise ArgumentError, I18n.t('errors.start_ip') if ((low..high)===start_ip or (low..high)===end_ip
p '*******************************'
end
rescue ArgumentError => msg
p msg
self.errors.add(:start_ip, msg)
return false
end
return true
end
答案 2 :(得分:1)
答案 3 :(得分:1)
如果我是你,我会向Ip
模型添加自定义验证检查:
validate :validate_pool_existence!
def validate_pool_existence
# DRY by taste
errors.add(:start_ip, I18n.t('errors.start_ip')) if IpPool.contains_ip?(start_ip)
errors.add(:end_ip, I18n.t('errors.end_ip')) if IpPool.contains_ip?(end_ip)
end
现在您需要向IpPool
添加一些有用的方法来支持ip范围查询:
# Check if any IpPool in database contains passed ip
# `all` usage maybe slow if you have lots of records in IpPool table
def self.contains_ip?(ip)
all.any? { |pool| pool.contains?(ip) }
end
# Check if current IpPool contains passed ip
def contains_ip?(ip)
to_addr.include? ip
end
# This returns an IPAddr range like this:
# #<IPAddr: IPv4:10.10.10.10/255.255.255.255>..#<IPAddr: IPv4:10.10.10.20/255.255.255.255>
def to_addr
AddrIP.new(start_ip)..AddrIP.new(end_ip)
end
那应该是它。这可行,因为IPAddr
支持范围,您可以查询ip是否在简单include?
检查的范围内:
>> range = IPAddr.new('10.10.10.10')..IPAddr.new('10.10.10.20')
=> #<IPAddr: IPv4:10.10.10.10/255.255.255.255>..#<IPAddr: IPv4:10.10.10.20/255.255.255.255>
>> range.include? '10.10.10.15'
=> true
>> range.include? '10.10.10.25'
=> false
享受! :)