I've got an interesting replecatable bug that has sprung up since I migrated some code i've written from rails 1.2.3 to 2.0.2. I am using a mysql backend database, in which I am storing IPv4 addresses as 32 bit unsigned integers. Of course, I don't want my users to have to enter the IP they are searching for in this fashion, nor do I want to have to make the conversion myself every time I call the find_by_ip function or find_or_create_by_ip function for the model, so I have overloaded those two functions. find_by_ip now reads as follows:
def self.find_by_ip(ip) super(NetAddr::CIDR.create(ip).to_i) end
This works, the first time IP.find_by_ip(address) is called (this test done in script/console):
ip = Ip.find_by_ip("10.21.1.8")
=> #<Ip id: 13, ip: 169148680>
However any subsequent calls to find_by_ip just return nil, even for the same IP address, until the environment is reloaded:
reload!
Reloading... => true
ip = Ip.find_by_ip("10.21.1.8")
=> #<Ip id: 13, ip: 169148680>
ip = Ip.find_by_ip("10.21.1.8")
=> nil
If I add some puts statements in my overloaded find_by_ip, they never get printed out after the first call to it has been done. Equally, if I call find_by_ip with a 32 bit int form of an IPv4 address it works reliably:
def self.find_by_ip(ip) puts "Testing\n" super(NetAddr::CIDR.create(ip).to_i) end
?> reload! Reloading... => true
ip = Ip.find_by_ip("10.21.1.8")
Testing => #<Ip id: 13, ip: 169148680>
ip = Ip.find_by_ip("10.21.1.8")
=> nil
ip = Ip.find_by_ip(169148680)
=> #<Ip id: 13, ip: 169148680>
It is as if, after the first call to my overloaded find_by_ip, rails decides to ignore my overloaded function and go straight to the base functionality it has for creating find_by functions. Can anyone else test this to prove it's not just me, and/or suggest who/where I should report it as a bug?
Thanks
Dan Meyers Network Support, Lancaster University