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class Subnet < ActiveRecord::Base
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include Authorization
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has_many :hosts, :through => :domain
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#has_many :sps, :through => :hosts
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belongs_to :domain
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validates_presence_of :number, :mask
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validates_uniqueness_of :number
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validates_format_of :number, :with => /(\d{1,3}\.){3}\d{1,3}/, :message => "self.number is invalid"
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validates_format_of :mask, :with => /(\d{1,3}\.){3}\d{1,3}/
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validates_uniqueness_of :name, :scope => :domain_id
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validates_associated :domain
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before_destroy Ensure_not_used_by.new(:hosts) #, :sps)
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# Subnets are displayed in the form of their network number/network mask
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def to_label
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"#{domain.name}: #{number}/#{mask}"
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end
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# If a subnet object exists then it can never be empty
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def empty?
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false
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end
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# Given an IP returns the subnet that contains that IP
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# [+ip+] : "doted quad" string
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# Returns : Subnet object
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def self.find_subnet(ip)
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Subnet.find(:all).each do |subnet|
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return subnet if subnet.contains ip
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end
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nil
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end
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def detailedName
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return "#{self.name}@#{self.number}/#{self.mask}"
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end
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end
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