How get data array from JSON object in python?

Question

I have a jquery POST function like this :

 $.post(data_send_url,
    {
        all_letters:["A","B","C"]
    },
    function(data, status){
        alert(data);
});

In the server side when I access it using request.data in a Django view function I get <QueryDict: {'all_letters[]': ['e', 'r', 'p']}>. How can I get a Python list like all_letters = ['e','r','p'] ?

Did you tried request.data[all_letters] ? Or json.loads ? — Umair Mohammad
– Umair Mohammad, Commented Jun 10, 2018 at 11:07
request.data["all_letters"] gives key error,request.data.get("all_letters") gives TypeError: the JSON object must be str, bytes or bytearray, not 'QueryDict' — Taohidul Islam
– Taohidul Islam, Commented Jun 10, 2018 at 11:11

Taohidul Islam · Accepted Answer · 2018-06-11 06:40:57Z

2

This code solved my problem:

$.post(data_send_url,
    {
        all_letters:JSON.stringify(["A","B","C"]), //JSON.stringify added
    },
    function(data, status){
        alert(data);
});

And in views.py

json.loads(request.data.get("all_letters"))
json.loads(request.POST["all_letters"]) #both of these work fine

edited Jun 11, 2018 at 6:40

answered Jun 10, 2018 at 13:27

Taohidul Islam

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Comments

Druta Ruslan · Accepted Answer · 2018-06-10 13:30:01Z

1

can you try to stringify the array and after this use json.loads ?

$.post(data_send_url,
    {
        all_letters: JSON.stringify(["A","B","C"])
    },
    function(data, status){
        alert(data);
});

# and after this use json.loads
import json

print(json.loads(request.data['all_letters']))

edited Jun 10, 2018 at 13:30

answered Jun 10, 2018 at 11:50

Druta Ruslan

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8 Comments

Druta Ruslan Over a year ago

try to print(request.POST) what you get ? show me

Taohidul Islam Over a year ago

<QueryDict: {'all_letters[]': ['a', 'b', 'c']}>

Druta Ruslan Over a year ago

@TaohidulIslam i make and update try something like this

Druta Ruslan Over a year ago

maybe django convert it automatically ?

Taohidul Islam Over a year ago

request.data.get("all_letters") gives ["A","B","C"] and json.loads(request.data.get("all_letters")) gives ['A','B','C'] !

|

Abijith Mg · Accepted Answer · 2018-06-10 11:51:01Z

0

Try 'all_letter[]' as key just like below:

request.data["all_letters[]"]

This might work otherwise try to construct querydict properly in JS code and try to access it.

answered Jun 10, 2018 at 11:51

Abijith Mg

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1 Comment

Taohidul Islam Over a year ago

It shows django.utils.datastructures.MultiValueDictKeyError: 'all_letters '

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