My django python functions not running correctly - django

Question

I am currently working on an e-commerce web app and decided to use the Beginning Django Ecommerce book. I am following the content and implementing it in my own way but i am having some issues with some few functions that are not running.
here are the apps with the files where i think the problem is coming from;
1. cart app models.py:
from django.db import models
from menu_items.models import Item
from smartmin.models import SmartModel
import django.db.models.options as options
options.DEFAULT_NAMES = options.DEFAULT_NAMES + ('augment_quatity','name','price','get_absolute_url','total',)
class OrderItem(SmartModel):
order_id = models.CharField(max_length=50)
date_added = models.DateTimeField(auto_now_add=True)
quantity = models.IntegerField(default=0)
item = models.ManyToManyField(Item)
class Meta:
db_table='order_items'
def __unicode__(self):
return "%s" % (self.order_id)
def total(self):
return self.quatity *self.item.price
def name(self):
return self.item.name
def price(self):
return self.item.price
def get_absolute_url(self):
return self.item.get_absolute_url()
# incase user orders same item twice we jus add on the quantity
def augment_quatity(self, quantity):
self.quatity = self.quantity + int(quantity)
self.save
orders.py in the same app:
from cart.models import OrderItem
#from cart.models import order_id
from menu_items.models import Item
from django.shortcuts import get_object_or_404
from django.http import HttpResponseRedirect
import decimal
import random
ORDER_ID_SESSION_KEY = 'order_id'
# get the current user's cart id, sets new one if blank
def _order_id(request):
if request.session.get(ORDER_ID_SESSION_KEY,'') == '':
request.session[ORDER_ID_SESSION_KEY] = _generate_cart_id
return request.session[ORDER_ID_SESSION_KEY]
def _generate_cart_id():
order_id =''
characters = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890!##$%^&*()'
order_id_length = 100
for y in range(order_id_length):
order_id += characters[random.randint(0,len(characters)-1
)]
return order_id
# return all items from the current user's order
def get_order_items(request):
return OrderItem.objects.filter(order_id=_order_id(request))
# add an item to order
def add_to_order(request):
postdata = request.POST.copy()
#get item slug from post data, return blank if empty
# item_slug = postdata.get('item_slug','')
#get quantity added, return 1 if empty
quantity = postdata.get('quantity',1)
# fetch the item or return missing page error_message
i = get_object_or_404(Item,)
# get items in order
order_items = get_order_items(request)
item_in_orders = False
# check to see if item is already in cart
for order_item in order_items:
if order_item.item.id == i.id:
#update the quantity if found
order_item.augment_quantity(quantity)
item_in_order = True
if not item_in_order:
# creat and save a new order item
oi = OrderItem()
oi.item = i
oi.quantity = quantity
oi.order_id = _order_id(request)
oi.save()
2.live app views.py
def show_order(request):
if request.method == 'POST':
postdata = request.POST.copy()
if postdata['submit'] == 'Remove':
order.remove_from_order(request)
if postdata['submit'] == 'Update':
order.update_order(request)
order_items = order.get_order_items(request)
page_title = 'F4L order'
order_subtotal = order.order_subtotal(request)
return render_to_response('public/order.html',context_instance=RequestContext(request))
Template where the functionality is not working,
{% extends "base.html" %}
{% block content %}
{% load menu_tags %}
<div style="height:30px">
{% order_box request %}
</div>
<table summary="Your menu order" id="menu_order">
<caption>Your F4L Orders</caption>
<thead>
<tr>
<th scope="col">Item</th>
<th scope="col">Price</th>
<th scope="col" class="right">Total</th>
</tr>
</thead>
<tfoot>
<tr>
<th class="right" colspan="2">
Order Subtotal:
</th>
<th class="right">
{{order_subtotal}}<span> frw</span>
</th>
</tr>
{% if order_items %}
<tr>
<th class="right" colspan="2">
Checkout Now
</th>
</tr>
{% endif %}
</tfoot>
<tbody>
{% if order_items %}
{% for item in order_items %}
<tr>
<td>
{{ item.name }}
</td>
<td>{{ item.price }}<span> frw</span></td>
<td class="right">
<form method="post" action="." class="order">
<label for="quantity">Quantity:</label>
<input type="text" name="quantity" value="{{ item.quantity }}" id="quantity" size="2" class="quantity" max_length="5" />
<input type="hidden" name="item_id" value="{{ item.id }}" />
</td>
<td>
<input type="submit" name="submit" value="update"/>
</form>
</td>
<td>
<form method="post" action="." class="order">
<input type="hidden" name="item_id" value="{{ item.id }}" />
</form>
</td>
<td>
<form method="post" action="." class="order">
<input type="hidden" name="item_id" value="{{ item.id}}" />
<input type="submit" name="submit" value="Remove" />
</form>
</td>
<td class="right">{{ item.total }}<span> frw</span></td>
</tr>
{% endfor %}
{% else %}
<tr>
<td colspan="2" style="height:30px;">
Your F4L order is empty.
</td>
</tr>
{% endif %}
</tbody>
</table>
{% endblock %}
Now th problem is, the above template code is a page a user redirects to after submitting a form with the quantity of item he/she is buying but that is not happening. After submitting form with for example 10items,i redirect to this page(above _template_), it loads correctly but does not return the information i submitted.
i do understand that this is alot but i have really need your help and will appreciate any sort of help.

Answer 1

In show_order view you should pass your variables to template as dictionary:
...
context_dict = {'order_items': order_items, 'order_subtotal': order_subtotal}
return render_to_response('public/order.html', context_dict, context_instance=RequestContext(request))