zmsmith

from django.db import models

class Author(models.Model):
    first_name = models.CharField(max_length=255)
    last_name = models.CharField(max_length=255)
    books = models.ManyToManyField('Book')

class Book(models.Model):
    title = models.CharField(max_length=255)

zmsmith

book_store = BookStore.objects.get(name="B&N")
authors = Author.objects.filter(book__in=book_store.books.all())

zmsmith

from django.db.models.fields.related import ReverseManyRelatedObjectsDescriptor
from django.db.models import ManyToManyField

class NewReverseManyRelatedObjectsDescriptor(ReverseManyRelatedObjectsDescriptor):

    def make_id_list(self, obj):

        through = self.field.rel.through
        name = self.field.m2m_field_name()
        related_name =self.field.m2m_reverse_field_name()

zmsmith

SELECT `author`.`id`, `author`.`first_name`, `author`.`last_name`
FROM `author`
INNER JOIN `author_books`
ON (`author`.`id` = `author_books`.`author_id`)
 WHERE `author_books`.`book_id`
IN (SELECT U0.`book_id` FROM `bookstore_books` U0 WHERE U0.`bookstore_id` = 1 )

zmsmith

SELECT `author`.`id`, `author`.`first_name`, `author`.`last_name`
FROM `author`
INNER JOIN `author_books`
ON (`author`.`id` = `author_books`.`author_id`)
WHERE `author_books`.`book_id`
IN (SELECT U0.`id`
     FROM `book` U0
     INNER JOIN `bookstore_books` U1
     ON (U0.`id` = U1.`book_id`)
     WHERE U1.`bookstore_id` = 1 )

zmsmith

class Author(models.Model):
    first_name = models.CharField(max_length=255)
    last_name = models.CharField(max_length=255)
    books = models.ManyToManyField('Book')

class Book(models.Model):
    title = models.CharField(max_length=255)

class BookStore(model.Model):
    name = models.CharField(max_length=255)

zmsmith

book_store = BookStore.objects.get(name="B&N")
authors = Author.objects.filter(book__in=book_store.books.id_list())

zmsmith

<div class="yourFancyBoxClass">
  {% if success %}
    <h2>It Worked!</h2>
  {% else %}
    <form action="{% url ajax_form %}">
      {% form %}
    </form>
   {% endif %}
</div>

zmsmith

from django.http import HttpRepsonse

def first_post(request):
    return HttpResponse('<h1>Hello World!</>')

zmsmith

import Image
import cStringIO
import os

from django.core.files.base import ContentFile
from django.db.models import ImageField
from django.db.models.fields.files import ImageFieldFile


class JPEGFieldFile(ImageFieldFile):