models.py

from django.db import models

class Moment(models.Model):
    title = models.CharFiend(max_length=128)
    image = models.ImageField(upload_to='moments')
    description = models.TextField()
    uploaded = models.DateTimeField(auto_now_add=True, blank=True)

    def __unicode__(self):
        return self.title

views.py

from django.views.generic import View
import json
from django.shortcuts import HttpResponse

from myapp.models import Moment

class MomentFeed(View):
    def get(self, request, *args, **kwargs):
        moments = Moment.objects.all().order_by('-uploaded')  # Load all moments in reverse order

        # Now convert to nice dicts for use in JSON
        json_moments = []
        for m in moments:
             json_moments.append({
               'id': m.id,
               'title': m.title,
               'image': m.description,
             })

        return HttpResponse(status=200, content_type='application/json', content=json.dumps(json_moments))

Totally untested, but point your url in urls.py to the MomentFeed (have to import it fist) to get an idea.