Hi,

We use a lot of IP Adresses and Networks in FFSomething. Currently the
default IPAdressField which works more or less good. To make it easier
to work with IP Networks, i wan't to create a generic IP field type.
Now my problem:

To make this field working on every database, i thought about this:
the
actuall column are one 128 bit integer and a 8 byte prefix column. The
ip is saved as a 128 bit integer value + the perfix length in a second
column. Using plain integer has advantages:

- db sort works out of the box
- inrange etc is easy math offloaded to the database

I looked arround, but havn't found a example except the rather
complicated ForeignKey stuff how to implement fields spanning two
columns and overloading stuff.

any tips welcome :)

kindly regards
  daniel


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