JQuery post to flask causes TypeError: 'NoneType' object is not subscriptable

Asked Jun 20 '19 at 09:34

Active Jun 21 '19 at 14:28

Viewed 753 times

with python3 and flask 1.0.3 I have created this method

@app.route("/robota/api/eye/left", methods=['POST'])
def move_eye():
   t = request.json['left']
   return 'test'

with JQuery I have created that function

    function move_eye(left){
        console.log(left);
        $.post(url + '/eye/left', left).done(function(leftEye) { showMyPositions(leftEye); });
    };

Which causes this output on the browser,

{posYaw: 53, posPitch: 37}

jquery.js:10254 POST http://localhost:8080/robota/api/eye/left 500

and this is returned by flask,

t = request.json['left']
TypeError: 'NoneType' object is not subscriptable

I have mentioed the version as it seems flask changed over time the json handling what would be the correct way to recieve the JQuery posted json on the flask side ?

edited Jun 21 '19 at 14:28

asked Jun 20 '19 at 09:34

user3732793

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Use `json()` instead of `json[]`. And check [this](https://stackoverflow.com/a/17517598/8353711) – shaik moeed Jun 20 '19 at 09:38
what data are you posting to flask please add that as well. – Tech at The Sparks Foundation Jun 20 '19 at 10:16
@shaik thanks I did so. see the eample below, still no good result – user3732793 Jun 21 '19 at 08:24
I am posting json. print(request.is_json) returns true but when accessing it by content = request.get_json() I get a bad request return from flask – user3732793 Jun 21 '19 at 08:25

JQuery post to flask causes TypeError: 'NoneType' object is not subscriptable

0 Answers0