숙제에서 동작은 잘 하는데, 콘솔창에 에러가 궁금해요

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숙제에서 동작은 잘 하는데, 콘솔창에 에러가 궁금해요

undefined주차

김*현

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답변 완료

콘솔창에 아래와 같은 에러가 있습니다.

어떻게 하면 없앨 수 있을까요?

Uncaught TypeError: Cannot read properties of undefined (reading 'comment')
    at Object.success ((index):91:42)
    at c (jquery.min.js:2:28294)
    at Object.fireWith [as resolveWith] (jquery.min.js:2:29039)
    at l (jquery.min.js:2:79800)
    at XMLHttpRequest.<anonymous> (jquery.min.js:2:82254)

[app.py]

from flask import Flask, render_template, request, jsonify
app = Flask(__name__)

from pymongo import MongoClient
client = MongoClient('mongodb+srv://test:sparta@cluster0.dvuyxax.mongodb.net/Cluster0?retryWrites=true&w=majority')
db = client.dbsparta

@app.route('/')
def home():
   return render_template('index.html')

@app.route("/homework", methods=["POST"])
def homework_post():
    name_receive = request.form["name_give"]
    comment_receive = request.form["comment_give"]

    doc = {
        'name'    : name_receive,
        'comment' : comment_receive
    }
    db.comments.insert_one(doc)

    return jsonify({'msg':'응원 감사합니다. comment db에 저장 완료!'})

@app.route("/homework", methods=["GET"])
def homework_get():
    comment_list = list(db.comments.find({}, {'_id': False}))
    return jsonify({'comments':comment_list})

if __name__ == '__main__':
   app.run('0.0.0.0', port=5000, debug=True)

[index.html]

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">

    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.2/dist/css/bootstrap.min.css" rel="stylesheet"
        integrity="sha384-EVSTQN3/azprG1Anm3QDgpJLIm9Nao0Yz1ztcQTwFspd3yD65VohhpuuCOmLASjC" crossorigin="anonymous">
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.0.2/dist/js/bootstrap.bundle.min.js"
        integrity="sha384-MrcW6ZMFYlzcLA8Nl+NtUVF0sA7MsXsP1UyJoMp4YLEuNSfAP+JcXn/tWtIaxVXM"
        crossorigin="anonymous"></script>

    <title>초미니홈피 - 팬명록</title>

    <link href="https://fonts.googleapis.com/css2?family=Noto+Serif+KR:wght@200;300;400;500;600;700;900&display=swap" rel="stylesheet">
    <style>
        * {
            font-family: 'Noto Serif KR', serif;
        }
        .mypic {
            width: 100%;
            height: 300px;

            background-image: linear-gradient(0deg, rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), url("https://mblogthumb-phinf.pstatic.net/MjAxOTA0MTdfMTI2/MDAxNTU1NDQ4MjQxNzM5.3qTnWfoDpbdkCXJSsZ4aWkkoYg9KfIk16ZE1g8vXHXgg.e4Ij1n2Z7yjrpTYFMWN6rVy2b4a-Fb0yCQxylaCfQyYg.PNG.miss10002/C6%E4%B8%A3BC%D2%B3AAC0CCC1F6C0BABEC6C0CCC0AFC6%D0%BCC72.png?type=w800");
            background-position: center 30%;
            background-size: cover;

            color: white;

            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
        }

        .mypost {
            width: 95%;
            max-width: 500px;
            margin: 20px auto 20px auto;

            box-shadow: 0px 0px 3px 0px black;
            padding: 20px;
        }

        .mypost > button {
            margin-top: 15px;
        }

        .mycards {
            width: 95%;
            max-width: 500px;
            margin: auto;
        }

        .mycards > .card {
            margin-top: 10px;
            margin-bottom: 10px;
        }
    </style>
    <script>
        $(document).ready(function(){
            show_comment()
        });
        function save_comment(){
            let name = $('#name').val()
            let comment = $('#comment').val()
            $.ajax({
                type: 'POST',
                url: '/homework',
                data: {
                    'name_give': name,
                    'comment_give': comment
                },
                success: function (response) {
                    alert(response['msg'])
                    window.location.reload()
                    }
            })
        }
        function show_comment(){
            $('#comment-list').empty()
            $.ajax({
                type: "GET",
                url: "/homework",
                data: {},
                success: function (response) {
                    let rows = response['comments']
                    for( let i=0; rows.length;i++) {
                        comment = rows[i]['comment']
                        name = rows[i]['name']
                        let temp_html = `<div class="card">
                                            <div class="card-body">
                                                <blockquote class="blockquote mb-0">
                                                    <p>${comment}</p>
                                                    <footer class="blockquote-footer">${name}</footer>
                                                </blockquote>
                                            </div>
                                        </div>`

                        $('#comment-list').append(temp_html)
                    }
                }
            });
        }
    </script>
</head>
<body>
    <div class="mypic">
        <h1> 💖 아이유 방명록 💖</h1>
        <p>현재기온: <span id="temp">36</span>도</p>
    </div>
    <div class="mypost">
        <div class="form-floating mb-3">
            <input type="text" class="form-control" id="name" placeholder="url">
            <label for="floatingInput">닉네임</label>
        </div>
        <div class="form-floating">
            <textarea class="form-control" placeholder="Leave a comment here" id="comment"
                style="height: 100px"></textarea>
            <label for="floatingTextarea2">응원댓글</label>
        </div>
        <button onclick="save_comment()" type="button" class="btn btn-dark">응원 남기기</button>
    </div>
    <div class="mycards" id="comment-list">
        <div class="card">
            <div class="card-body">
                <blockquote class="blockquote mb-0">
                    <p>새로운 앨범 너무 멋져요!</p>
                    <footer class="blockquote-footer">호빵맨</footer>
                </blockquote>
            </div>
        </div>
        <div class="card">
            <div class="card-body">
                <blockquote class="blockquote mb-0">
                    <p>새로운 앨범 너무 멋져요!</p>
                    <footer class="blockquote-footer">호빵맨</footer>
                </blockquote>
            </div>
        </div>
        <div class="card">
            <div class="card-body">
                <blockquote class="blockquote mb-0">
                    <p>새로운 앨범 너무 멋져요!</p>
                    <footer class="blockquote-footer">호빵맨</footer>
                </blockquote>
            </div>
        </div>
    </div>
</body>
</html>

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