No emitters found for type ext-json

Question

I have this error "No emitters found for type ext-json" in running my django... i dont have any idea about my situation.

i just followed this tutorial and the example is good. http://weblog.mattdorn.com/content/restful-web-apps-with-django-piston-and-ext-js/

i have followed on making handlers.py, emmiters.py and the others step...

this my url.py

from django.conf.urls.defaults import *
from piston.resource import Resource
from phonebook.api.handlers import PhonebookHandler

phonebook_handler = Resource(PhonebookHandler)

urlpatterns=patterns('',
    url(r'^phonebooks/(?P<id>\d+)/$',phonebook_handler, {'emitter_format': 'ext-json'}),
    url(r'^phonebooks$',phonebook_handler, {'emitter_format': 'ext-json'}),
) 

my emitters.py and handlers.py is same to the tutorial,... the different is my models.py

from django.db import models
from django.contrib.auth.models import User

CHOICES = (
    (u'M', u'Male'),
    (u'F', u'Female'),
)

class Phonebook(models.Model):
    fullname = models.CharField(max_length=50,null=True)
    address = models.CharField(max_length=100,null=True)
    age = models.IntegerField(max_length=2,null=True)
    gender = models.CharField(max_length=1, choices=CHOICES)
    phonenumber = models.CharField(max_length=15,null=True)
    def __unicode__(self):
        return self.fullname     

is there are any installation about ext-json?

Answer 1

You need to import your custom emitter class at some point so that it gets registered.