完成评论功能(2017.12.8)

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():
    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)    #执行操作
    db.session.commit()     # 提交到数据库
    return redirect(url_for('xiangqing',question_id=ques_id))

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

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

3、显示评论次数

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

4、要求评论前登录

@loginFirst

5、尝试实现详情页面下的评论列表显示

 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)

运行结果：

数据库中：