How to GET data in Flask from AJAX post

Question

I want to retrieve the data from the variable \'clicked\' so I can use it in SQL queries in Flask.

JQuery

$(document).ready(function(){
  var clicked         


        

Answer 1

I used the best answer but i found a bad request error. I solve this error as below:

1- remove this line from ajax request:

contentType: 'application/json;charset=UTF-8',

2- Access to data by request.form instead of request.json.

The Javascript part will similar to this:

$(document).ready(function(){
var clicked;
$(".favorite").click(function(){
clicked = $(this).attr("name");
$.ajax({
  type : 'POST',
  url : "{{url_for('test')}}",
  data : {'data':clicked}
});
 });
});

Flask part:

@app.route('/test/', methods=['GET','POST'])
def test():
      clicked=None
      if request.method == "POST":
          clicked=request.form['data']
     return render_template('test.html')

Answer 2

At your flask app end-point , you can define method to retrieve GET/POST data like this :

from flask_restful import reqparse

def parse_arg_from_requests(arg, **kwargs):
    parse = reqparse.RequestParser()
    parse.add_argument(arg, **kwargs)
    args = parse.parse_args()
    return args[arg]

@app.route('/test/', methods=['GET','POST'])
def test():
      clicked = parse_arg_from_requests('data')
      return render_template('test.html' , clicked=clicked)

Answer 3

You can compose your payload in your ajax request as so:

$(document).ready(function(){
var clicked;
$(".favorite").click(function(){
clicked = $(this).attr("name");
$.ajax({
  type : 'POST',
  url : "{{url_for('test')}}",
  contentType: 'application/json;charset=UTF-8',
  data : {'data':clicked}
});
 });
});

In your flask endpoint, you can extract the value as follows:

@app.route('/test/', methods=['GET','POST'])
def test():
     clicked=None
     if request.method == "POST":
          clicked=request.json['data']
     return render_template('test.html')