Re: request.POST parsing without form

On Friday, January 28, 2011 7:05:21 PM UTC, taso wrote:

Hi,

I am using django strictly as a backend for data processing. As such I
am not using any forms or templates, just database tables as models.
The page is js driven and POSTing data is causing me some issues.

A user action triggers a POST that looks like:

action "update"
data { "field1": 8,"id": 2 }
(copied from firebug)

When I try to parse the POST data I get errors on every type of method
I have tried. What I eventually would like to do is something like:

if request.POST.__getitem__('xaction') == 'update':
    mydata = request.POST.__getitem__('data')
    model_to_update = modelname.get(id=mydata['id']
    for k,v in mydata:
        setattr(model_to_update, k, v)
        model_to_update.save()

However every time I try to parse the "data" POST values I get errors.
I wonder if I am missing some assumptions by not importing/using
forms, or if there is a standard method to iterate through the POST
data that I am missing. I have literally tried every \*get\* dict
method from the docs and all throw errors (.list() throws numeric
indicies errors, iteritems() throws not iterable, etc.)

Any thoughts?

Thanks
Taso

Why on earth do you want to use __getitem__? That's an internal implementation detail, which you should never need to access in your code unless you're overriding something. POST is a dictionary-like object, which defines __getitem__ so that you can access it with the usual Python dictionary access: request.POST['data'], and so on.

Secondly, if I'm understanding what you have posted, `data` is not an element of the POST dictionary - it *is* the POST dictionary. So rather than trying to access `request.POST['data']['id']`, you should be accessing `request.POST['id']`.

--

DR.

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