https://www.facebook.com/groups/django/permalink/519203541449483/ 에 대한 테스트 코드

forms.py

from django import forms
from .models import IPAddr, SomeModel

class SomeForm(forms.ModelForm):
    ip = forms.IPAddressField()

    def save(self, commit=True):
        ip = self.cleaned_data['ip']
        ip_addr, is_created = IPAddr.objects.get_or_create(ip=ip)
        instance = super(SomeForm, self).save(commit=False)
        instance.ip_addr = ip_addr
        if commit:
            instance.save()
        return instance

    class Meta:
        model = SomeModel
        fields = ('ip',)

main.py

from testapp.forms import SomeForm
from testapp.models import SomeModel

form = SomeForm({'ip':'1.2.3.4'})
if form.is_valid():
    form.save()
else:
    print form.errors

models.py

from django.db import models

class IPAddr(models.Model):
    ip = models.CharField(max_length=15)

class SomeModel(models.Model):
    ip_addr = models.ForeignKey(IPAddr)