1、定義評論的視圖函數
@app.route(‘/comment/‘,methods=[‘POST‘])
def comment()：
讀取前端頁面數據，保存到數據庫中

@app.route(‘/comment/‘, methods=[‘POST‘])
@loginFirst
def comment():
    comment = request.form.get(‘new_comment‘)
    ques_id = request.form.get(‘question_id‘)
    auth_id = User.query.filter(User.username == session.get
 
(‘user‘)).first().id
    comm = Comment(author_id=auth_id, question_id=ques_id, detail=comment)
    db.session.add(comm)    #執行操作
    db.session.commit()     # 提交到數據庫
    return redirect(url_for(‘xiangqing‘,question_id=ques_id))

2、用<input type="hidden" 方法獲取前端的"question_id"

<input name="question_id
 
" type="hidden" value="{{ ques.id }}">

3、顯示評論次數

 <h4>comment:({{ ques.comments|length }})</h4>

4、要求評論前登錄

@loginFirst

5、嘗試實現詳情頁面下的評論列表顯示

detail.html

 <ul class="list-unstyled">
                {% for foo in comments %}
                    <li class="list-group-item">
                        <a>{{ foo.author.username }}</a>
                        <span class
 
="badge pull-right">{{ foo.creat_time }}</span>
                        <p>{{ foo.detail }}</p>
                        <br>
                    </li>
                {% endfor %}
            </ul>

@app.route(‘/xiangqing/<question_id>‘)
def xiangqing(question_id):
    quest = Question.query.filter(Question.id == question_id).first()
    comments = Comment.query.filter(Comment.question_id==question_id).all()
    return render_template(‘xiangqing.html‘, ques=quest,comments=comments)

運行結果：

數據庫中：

完成評論功能(2017.12.8)