작성한 코드 및 에러 메세지

app.py창 작성

@app.route("/mars", methods=["POST"])
def web_mars_post():
    name_receive = request.form['name_give']
    address_receive = request.form['address_give']
    size_receive = request.form['size_give']

    doc = {
        'name':name_receive,
        'address':address_receive,
        'size':size_receive
    }
    db.mars.insert_one(doc)

    return jsonify({'msg': '주문 완료!'})

index창 작성

<script>
    $(document).ready(function () {
        show_order();
    });
    function show_order() {
        $.ajax({
            type: 'GET',
            url: '/mars',
            data: {},
            success: function (response) {
                alert(response['msg'])
            }
        });
    }
    function save_order() {
        let name = $('#name').val()
        let address = $('#address').val()
        let size = $('#size').val()

        $.ajax({
            type: 'POST',
            url: '/mars',
            data: { name_give: name, address_give: address, size_give: size },
            success: function (response) {
                alert(response['msg'])
                window.location.reload()
            }
        });
    }
</script>