'WSGIRequest' object has no attribute 'update'

[Phang Mulianto]

Hi all..i am learning django no, using django 1.3 + python 2.7 . i came from php world...

i am using a book , and follow the code in there, but got error and cannot find whats the cause. here are the errors.

anyone can give some clue? Thanks

AttributeError at /cart/

'WSGIRequest' object has no attribute 'update'

Request Method:	GET
Request URL:	http://127.0.0.1:8000/cart/
Django Version:	1.3
Exception Type:	AttributeError
Exception Value:	'WSGIRequest' object has no attribute 'update'
Exception Location:	c:\python27\lib\site-packages\django\template\loader.py in render_to_string, line 186
Python Executable:	c:\python27\python.exe
Python Version:	2.7.2
Python Path:	['C:\\Users\\mulianto\\workspace\\ecomstore\\src\\ecomstore', 'c:\\python27\\lib\\site-packages\\setuptools-0.6c11-py2.7.egg', 'C:\\Windows\\system32\\python27.zip', 'c:\\python27\\DLLs', 'c:\\python27\\lib', 'c:\\python27\\lib\\plat-win', 'c:\\python27\\lib\\lib-tk', 'c:\\python27', 'c:\\python27\\lib\\site-packages']
Server time:	Sun, 10 Jul 2011 13:23:33 +0800

Environment:


Request Method: GET
Request URL: http://127.0.0.1:8000/cart/

Django Version: 1.3
Python Version: 2.7.2
Installed Applications:
['django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.sites',
 'django.contrib.messages',
 'django.contrib.staticfiles',
 'django.contrib.admin',
 'django.contrib.flatpages',
 'ecomstore.catalog',
 'ecomstore.utils',
 'ecomstore.cart']
Installed Middleware:
('django.middleware.common.CommonMiddleware',
 'django.contrib.sessions.middleware.SessionMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware',
 'django.contrib.flatpages.middleware.FlatpageFallbackMiddleware')


Traceback:
File "c:\python27\lib\site-packages\django\core\handlers\base.py" in get_response
  111.                         response = callback(request, *callback_args, **callback_kwargs)
File "C:\Users\mulianto\workspace\ecomstore\src\ecomstore\..\ecomstore\cart\views.py" in show_cart
  17.     return render_to_response(template_name, locals(), context_instance=(request))
File "c:\python27\lib\site-packages\django\shortcuts\__init__.py" in render_to_response
  20.     return HttpResponse(loader.render_to_string(*args, **kwargs), **httpresponse_kwargs)
File "c:\python27\lib\site-packages\django\template\loader.py" in render_to_string
  186.     context_instance.update(dictionary)

Exception Type: AttributeError at /cart/
Exception Value: 'WSGIRequest' object has no attribute 'update'

[Shawn Milochik]

May we see the rest of your view? If not, you'll have to figure it out
by examining exactly what your 'request' variable contains. The error is
clearly from calling update() on it, and it not being allowed.

[Phang Mulianto]

Hi Shawn,

Here are the view called :

# Create your views here.
from django.shortcuts import render_to_response
from django.template import RequestContext
from ecomstore.cart import cart

def show_cart(request, template_name="cart/cart.html"):
    if request.method == 'POST':
        postdata = request.POST.copy()
        if postdata['submit'] == 'Remove':
            cart.remove_from_cart(request)
        if postdata['submit'] == 'Update':
            cart.update_cart(request)
  
    cart_item_count = cart.cart_item_count(request)
    page_title = "Shopping Cart" 
    cart_subtotal = cart.cart_subtotal(request)
    return render_to_response(template_name, locals(), context_instance=(request))

Thanks for your help..

On Sun, Jul 10, 2011 at 11:57 PM, Shawn Milochik <sh...@milochik.com> wrote:

May we see the rest of your view? If not, you'll have to figure it out by examining exactly what your 'request' variable contains. The error is clearly from calling update() on it, and it not being allowed.

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[Malcolm Box]

Hi,.

On 11 July 2011 08:29, Phang Mulianto <brav...@gmail.com> wrote:

    return render_to_response(template_name, locals(), context_instance=(request))

The bug is in this line. render_to_response() takes a dictionary as the context_instance, but this code just passes the request instance.

You probably meant either:

return render_to_response(template_name, locals(), context_instance=(request, ))  # Note comma

or

return render_to_response(template_name, locals(), context_instance={'request':request}))

HTH,

Malcolm

[Phang Mulianto]

The bug is in this line. render_to_response() takes a dictionary as the context_instance, but this code just passes the request instance.

You probably meant either:

return render_to_response(template_name, locals(), context_instance=(request, ))  # Note comma

or

return render_to_response(template_name, locals(), context_instance={'request':request}))

HTH,

Malcolm

Hi Malcolm,

already try your reccomendation, but still got error.

and i check with other view in the apps, i found out you are right, the bug is in the render_to_response.

i fix it with this one :
  return render_to_response(template_name, locals(),context_instance=RequestContext(request))

i miss the RequestContext(request))

This one think which pass all the context processed variable to the template.

Thanks, and i learn now how to read error message and track it down now..

It solved now..

continue to learning...