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
2. 用<input type="hidden" 方法获取前端的"question_id" 
3. 显示评论次数
4. 要求评论前登陆
5. 尝试实现详情页面下的评论列表显示

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

    

{% extends'base.html' %}
{% blook title %}问答详情{% endblock %}
{% block main %}
   <div class="page-header"
        <h3>{{ ques.title }}<br><small>{{ ques.author.username }}<span class="badge">{{ ques.creat_time}} </span></small></h3>
</div>
<p class="lead">{{ ques.detail }}</p>
<hr>
<form action="{{ url_for('comment') }}"method="''post"style=""></form>
<div class="form-group" style="align-items: ">
     <textarea name="new_comment" class="form-control" rows="3" id="new-comment" placeholder="write your comment"></textarea>

 <input type="hidden" name="questions_id" value="{{ questions.id }}">

</div> 
<button type="submit" class="btn btn-default">发送</button> </form> 
<h4> 评论：({{ ques.comments|length }})</h4>
 <ul class="list-group" style="align-items:"> </ul>

 {% endblock %}