Django: Passing multiple keys into AJAX including a JavaScript seralised form and parsing them in python

Question

What I need

I'm trying to find a way to send a multi layered dictionary via AJAX to my server, including a JavaScript seralised form with the use of serialize().

The issue

When I use data: frm.serialize();. It's a single layered json and it is easily parsed when returned to server with result:

<QueryDict: {'csrfmiddlewaretoken': ['6aTZ7xey90sczae15069ZlbIiE7gVWW69RyeJBptUxadbgnBo8t8R0Nskg8S8Jzb', '6aTZ7xey90sczae15069ZlbIiE7gVWW69RyeJBptUxadbgnBo8t8R0Nskg8S8Jzb'], 'days': ['Mon', 'Wed'], 'no_weeks': ['1']}>

Then when using a nested dictionary with

data: {'form':frm.serialize(),'additional_data':12,'csrfmiddlewaretoken' : $("input[name=csrfmiddlewaretoken]").val()}```

I get:

<QueryDict: {'form': ['csrfmiddlewaretoken=IF2D4vTBjaQSsrE4oY3Lb36jekPB5nZbLmHSGz4w4HyT4xNEH6qK3II3gWQdiaCg&days=Mon&days=Thu&no_weeks=2&csrfmiddlewaretoken=IF2D4vTBjaQSsrE4oY3Lb36jekPB5nZbLmHSGz4w4HyT4xNEH6qK3II3gWQdiaCg'], 'additional_data': ['12'], 'csrfmiddlewaretoken': ['IF2D4vTBjaQSsrE4oY3Lb36jekPB5nZbLmHSGz4w4HyT4xNEH6qK3II3gWQdiaCg']}>

What i've tried

I have attempted with use of this answer to use urllib to parse the form section of the data into a separate variable. Like so:

x = parse_qs(urllib.parse.urlparse(request.POST['form']).query)

This returns an empty dicitonary.

Code

HTML

<form method="post" id="replicate_form"> 
   [..more code]
</form>

Javscript

function send_replication_data() {
    var frm = $('#replicate_form')
    var form_server_response = submit_formdata(frm)
}

// parent function to handle replcation form saving

$('#create_replicate_booking_button').on('click', function() {
    send_replication_data() 
});

// submit booking data ajax

function submit_formdata(frm) {
    var tmp = $.ajax({
            type: frm.attr('method'),
            async:false,
            url: window.location.href,
            data: {'form':frm.serialize(),
                   'additional_data':12,
                   'csrfmiddlewaretoken' : $("input[name=csrfmiddlewaretoken]").val()}

        });
    return tmp.responseJSON;
}

Possibly I could somehow make use of whatever Django is doing in it's middleware to a parse the form data in the first scenario?

minglyu · Accepted Answer · 2020-07-03 08:22:13Z

1

The .serialize() method creates a text string in standard URL-encoded notation.

You could use urllib.parse.parse_qs to parse a query string(form data sent to server by GET) or request.POST['form'] since it uses the same encoding.

Query strings are element of urls, while request.POST['form'] has no attribute called query

from urllib import parse
x = parse.parse_qs(request.POST['form']).query)

edited Jul 3, 2020 at 8:22

answered Jul 3, 2020 at 8:03

minglyu

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