Django request Post json

Question

I try to test a view, I receive a json request from the IPad, the format is:

req = {"custom_decks": [
        {
            "deck_name": "deck_test",
            "updates_last_applied": "1406217357",
            "created_date": 1406217380,
            "slide_section_ids": [
                1
            ],
            "deck_id": 1
        }
          ],
    "custom_decks_to_delete": []
}

I checked this in jsonlint and it passed.

I post the req via:

response = self.client.post('/library/api/6.0/user/'+ uuid +
'/store_custom_dec/',content_type='application/json', data=req) 

The view return "creation_success": false

The problem is the post method in view doesn't find the key custom_decks.

QueryDict: {u'{"custom_decks": [{"deck_id": 1, "slide_section_ids": [1], 
"created_date":1406217380, "deck_name": "deck_test"}], 
"custom_decks_to_delete": []}': [u'']}>

The problem is the post method in view doesn't find the key custom_decks. Because it is converting my dict to QueryDict with one key.

I appreciate all helps.

Thanks

Answer 1

You're posting JSON, which is not the same as form-encoded data. You need to get the value of request.body and deserialize it:

data = json.loads(request.body)
custom_decks = data['custom_decks']

Answer 2

As I was having problems with getting JSON data from HttpRequest directly with the code of the other answer:

data = json.loads(request.body)
custom_decks = data['custom_decks']

error:

the JSON object must be str, not 'bytes'

Here is an update of the other answer for Python version >3:

json_str=((request.body).decode('utf-8'))
json_obj=json.loads(json_str)

Regarding decode('utf-8'), as mention in:

RFC 4627:

"JSON text shall be encoded in Unicode. The default encoding is UTF-8."

I attached the Python link referred to this specific problem for version >3.

http://bugs.python.org/issue10976

Answer 3

Since HttpRequest has a read() method loading JSON from request is actually as simple as:

def post(self, request, *args, **kwargs):
    import json
    data = json.load(request)
    return JsonResponse(data=data)

If you put this up as a view, you can test it and it'll echo any JSON you send back to you.

Answer 4

python 3.6 and django 2.0 :

post_json = json.loads(request.body)
custom_decks = post_json.get("custom_decks")

json.loads(s, *, encoding=None,...)

Changed in version 3.6: s can now be of type bytes or bytearray. The input encoding should be UTF-8, UTF-16 or UTF-32.

From python 3.6 NO need request.body.decode('utf-8') .