Greetings,
I have a question on how to update an existing row in my database when one of
the fields is my primary key. I am using ModelForm and Django-Piston - my main
goal here is to have RESTful Post send to my webservice. I am able to have
initial Posts be sent correctly (i.e. that Primary key value doesn't exist
yet). The problem is when I want to update a value where the Primary key
already exists - f.is_valid() it fails because "this UniqueIdentifier already
exists". How can I do form validation using ModelForms to update an existing
row?
models.py:
from django.db import models
class DeviceModel(models.Model):
uniqueIdentifier = models.CharField(primary_key=True, max_length=100)
deviceToken = models.CharField(max_length=100)
forms.py
from django import forms
from models import DeviceModel
class DeviceModelForm(forms.ModelForm):
class Meta:
model = DeviceModel
handlers.py
class DeviceHandler(BaseHandler):
allowed_methods = ('POST', 'GET', 'DELETE',)
def create(self, request):
f = DeviceModelForm(request.POST)
if f.is_valid():
new_object = f.save()
return new_object
return rc.BAD_REQUEST
urls.py
from django.conf.urls.defaults import *
from piston.resource import Resource
from api.handlers import DeviceHandler
device_handler = Resource(DeviceHandler)
urlpatterns = patterns('',
(r'^api/$', device_handler, {'emitter_format': 'json'}),
)
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