On Fri, Apr 9, 2010 at 1:41 PM, Ken Lacey <ken.la...@dit.ie> wrote:
> Hi
>
> I am trying to check an IP so some information will/will not be
> displayed based on the first 8 digites of the remote IP address.
>
> I have a vairable ip_address which contains the remote address and a
> vairable accept_ip with a value "192.168." but when I carry out the
> following it is not working correctly.
>
> {% ifequal ip_address|slice:"8" accept_ip %}
> do something
> {% endifequal %}
>
>
> I have also tried
> {% ifequal ip_address|slice:"8" "192.168." %}
> do something
> {% endifequal %}
>
> and
> {% ifequal ip_address|slice:"8"|stringformat:"s" "192.168." %}
> do something
> {% endifequal %}
>
> the same results appaear whether the ip_address is 192.168..... or any
> other range.
>
> Thanks
>
> Ken
>
You shouldn't do logic like this in the template - as you can see, it
is quite hard!
The simplest option is to calculate whether that IP is in the correct
range in the view and set a variable in the context to indicate that.
If you are iterating through a list of things, you would probably want
to write a templatetag to do the comparison for you.
PS:
Treating IP addresses as strings, and performing string manipulation
to test belonging is poor form. I would recommend the netaddr library,
and write code like this:
>>> import netaddr
>>> range = netaddr.IPNetwork('192.168.0.0/16')
>>> addr = netaddr.IPAddress('192.168.12.4')
>>> addr in range
True
Cheers
Tom
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