从首页问答标题到问答详情页

1. 1. 主PY文件写视图函数，带id参数。 

      @app.route('/detail/<question_id>')
      def detail(question_id):
          quest = 
          return render_template('detail.html', ques = quest)

       

      @app.route('/detail/<question_id>')
      def detail(question_id):
          quest = Question.query.filter(Question.id == question_id).first()
          return render_template('detail.html',ques=quest)

       

   2. 首页标题的标签做带参数的链接。
            {{ url_for('detail',question_id = foo.id) }}
      

      {% block main%}
      <p>{{user}} context</p>
      <ul class="list-group">
      {% for foo in questions %}
          <li class="list-group-item">
              <span class="glyphicon glyphicon-leaf" aria-hidden="true"></span>
              <a href="#">{{ foo.author.username }}</a>
              <br>
              <a href="{{ url_for('detail',question_id=foo.id) }}">{{ foo.title }}</a>
              <span class="badge">{{ foo.creat_time }}</span>
              <p style="color:black">{{ foo.detail }}</p>
          </li>
      {% endfor %}
      </ul>
      {% endblock %}

       

   3. 在详情页将数据的显示在恰当的位置。 

      {{ ques.title}}
      {{ ques.id  }}{{  ques.creat_time }}

      {{ ques.author.username }} 
      {{ ques.detail }}

      {% extends 'base.html' %}
      {% block title %}问答{% endblock %}
      {% block main %}
      <div class="page-header">
      <h3>题目：{{ ques.title }}<br><small>作者：{{ ques.author }} 时间：{{ ques.create_time }}</small></h3>
      </div>
      <p class="lead">detail{{ ques.detail }}</p>
      <hr>
      <form action="{{ url_for('question') }}" method="post">
      <div class="form-group">
      <textarea name="new_comment" class="form-control" rows="3" id="new_comment" placeholder="write your comment"></textarea>
      </div>
      <button type="submit" class="btn btn-default">提交</button>
      </form>
      <ul class="list-group" style="margin: 10px"></ul>
      
      {% endblock %}

       

   4. 建立评论的对象关系映射：

      class Comment(db.Model):
          __tablename__='comment'

      class Comment(db.Model):
          __tablename__ = 'comment'
          id = db.Column(db.Integer, primary_key=True, autoincrement=True)
          author_id = db.Column(db.Integer, db.ForeignKey('user.id'))
          sent_id = db.Column(db.Integer, db.ForeignKey('sent.id'))
          creat_time = db.Column(db.DateTime, default=datetime.now)
          detail = db.Column(db.TEXT, nullable=False)
          sent = db.relationship('Sent', backref=db.backref('comment'))
          author = db.relationship('User', backref=db.backref('comment'))

       

   5.  尝试实现发布评论。