Handling ajax json object in Django - 'QueryDict' object has no attribute 'read' error

Question

I am trying to parse json object in my Django view which has been passed through from client by ajax via post method.

JS:

$.post ('/update_vendor_merchandise_types/', JSON.stringify(json_obj));

View:

def update_vendor_merchandise_types(request):
    print json_object
    # The output gives me  
    # QueryDict: <QueryDict: {u'[{"merchandise_id":"3"},{"merchandise_id":"4"}]': [u'']}>
    json_object = json.load(request.POST) # Error arises
pass

On the commented line 'QueryDict' object has no attribute 'read' error arises. What am I doing wrong ?

Eventually, my goal is to get access to merchandise_id values. I try

d = request.POST.iteritems()
for key, value in d:
    print value

and expect something like

3 
4

You would do json.load to convert json format to a dict. Here, you have a dict you want to convert to json. You would be doing json.dumps(request.POST.copy()) — karthikr
– karthikr, Commented Jun 1, 2016 at 13:15
What are you actually trying to do? request.POST is a dictionary which should contain any data you actually need, there isn't any point jsonifying it — Sayse
– Sayse, Commented Jun 1, 2016 at 13:20
I have edited the question. Please see the value of the json_object. I am trying to loop over it. Say, print all the merchandise_id and respective value values — Edgar Navasardyan
– Edgar Navasardyan, Commented Jun 1, 2016 at 13:23

Daniel Roseman · Accepted Answer · 2016-06-01 13:28:13Z

4

request.POST is for form-encoded content. For JSON, you should access the plain body directly:

json_object = json.loads(request.body)

answered Jun 1, 2016 at 13:28

Daniel Roseman

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3 Comments

Edgar Navasardyan Over a year ago

Daniel, I mark your answer as solution because your option translated json into python list which turned out easiest way to loop (d = json.loads(request.body) for x in d: print x['merchandise_id']). @Eduard, your suggested way also worked.

Edgar Navasardyan Over a year ago

Daniel, can you see this question, please ?

Edgar Navasardyan Over a year ago

stackoverflow.com/questions/37586305/…

Eduard Stepanov · Accepted Answer · 2016-06-01 13:32:41Z

4

Why do you convert json_obj into string when sending it to server? I think you should do it in this way:

json_obj = {"key1": "value1", "key2": "value2"}
$.post('/update_vendor_merchandise_types/', json_obj)

In this case on the server side you can access sent data in this way:

v1 = request.POST["key1"]

answered Jun 1, 2016 at 13:32

Eduard Stepanov

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2 Comments

Edgar Navasardyan Over a year ago

Eduard, actually, I would like the code of the loop to be as generic as possible, and I want to avoid addressing the json elements by their field names. Instead, my ultimate goal is to loop over it

Eduard Stepanov Over a year ago

may be your json_obj should look like this: {"merchandise_ids": ["3", "4"]}, in this case you can get on a server a list of merchandise ids by executing ids = request.POST["merchandise_ids"]

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