完成评论功能

1.定义评论的视图函数
@app.route('/comment/',methods=['POST'])
def comment()：
读取前端页面数据，保存到数据库中

@app.route('/comment/',methods=['POST'])
@loginFirst
def comment():
        detail=request.form.get('detail')
        author_id = User.query.filter(User.username == session.get('user')).first().id
        question_id = request.form.get('question_id')
        comment = Comment(author_id=author_id,question_id=question_id,detail=detail)
        db.session.add(comment)  # 保存到数据库
        db.session.commit()  # 提交
        return redirect(url_for('detail',question_id=question_id))

2.用<input type="hidden" 方法获取前端的"question_id" 

3.显示评论次数

4.要求评论前登录

5.尝试实现详情页面下的评论列表显示

{% extends 'base.html' %}

{% block title %}Detail{% endblock %}

{% block head %}
    <link href="{{ url_for('static',filename='CSS/detail.css') }}" rel="stylesheet" type="text/css">
{% endblock %}

{% block main %}
<div class="detail">
    <h2>{{ question.title }}</h2>
    <a href="#">{{ question.author.username }}</a>
    <span>{{ question.creat_time }}</span>
    <div class="p">
        <p>{{ question.detail }}</p>
    </div>
    <form action="{{ url_for('comment') }}" method="post">
        <textarea name="detail" rows="5"></textarea><br>
        <button >Send</button>
        <input name="question_id" type="hidden" value="{{ question.id }}">
    </form>
    <br>

    <ul>
        <p style="font-weight: 600;font-size: 16.5px">Comment[{{ question.comments|length }}]</p>
        <div>
            {% for foo in question.comments %}
            <li>
                <img src="{{ url_for('static',filename='image/body.png') }}">
                <a href="#">{{ foo.author.username }}</a>
                <span>{{ foo.creat_time }}</span><br>
                <p>{{ foo.detail }}</p>
            </li>
            {% endfor %}
        </div>
    </ul>
</div>
{% endblock %}