从首页问答标题到问答详情页(2017.12.5)

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)

    

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

1、主PY文件写视图函数，带id参数。 

@app.route('/xiangqing/<question_id>')
def xiangqing(question_id):
    quest=Question.query.filter(Question.id==question_id).first()
    return render_template('xiangqing.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) }}

shouye.html:

{% extends 'base.html' %}
{% block title %}首页{% endblock %}
{% block head %}
    <link rel="stylesheet" type="text/css" href="../static/css/shouye.css">
{% endblock %}
{% block main %}
    <div class="question-box">
        <P style="font-size: 18px">{{ user }}prefect</P>
        <ul class="list-group" style=" padding-left: 10px;padding-right: 10px;">
            {% for foo in questions %}
                <li class="list-group-item"
                    style="padding-left: 0px; padding-right: 10px; box-shadow: rgba(0, 0, 0, 0.498039) 0px 0px 0px 0px;">
                    <img src=http://p1.so.qhimgs1.com/t01e53e241b251ff5e1.jpg alt="64">
                    <span class="glyphicon glyhicon-leaf" aria-hidden="true"></span>
                    <a href="#">呆梨：{{ foo.username }}</a><br>
                    <a href="{{ url_for('xiangqing',question_id=foo.id )}}">问题：{{ foo.title }}</a><br>
                    <p style="color: indianred">详情：{{ foo.detail }}</p>
                        <span class="badge">首播时间：{{ foo.creat_time }}</span><br>
                </li>
            {% endfor %}
        </ul>
    </div>
{% endblock %}

3、在详情页将数据的显示在恰当的位置。 

index.html:

{% extends 'base.html' %}
{% block title %}问答详情{% endblock %}
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">
{% block main %}
    <div class="col-md-2 column "></div>
    <div class="col-md-8 column ">
        <div class="page-headr">
            <h1>welcome to here
                !</h1><br>
            <h3>Title{{ ques.title }}<br>
                <small>author:{{ ques.author.username }}<span class="badge">time:{{ ques.creat_time }}</span></small>
            </h3>
            <hr>
            <p>detail:{{ ques.detail }}</p>
            <hr>
            <form>
                <div class="form-group">
            <textarea name="new_comment" class="form-control" rows="5" id="new-comment"
                      placeholder="Write your comment~" style="width: 850px"></textarea><br>
                </div>
                <button type="submit" class="btn btn-default" style="width:100px "> 发送
                </button>
            </form>
{#                            <h4>comment:({{ ques.comments|length }})</h4>#}
            <ul class="list-group" style="margin: 10px"></ul>
        </div>
    </div>
    <div class="col-md-2 column "></div>
{% endblock %}

结果：

4、建立评论的对象关系映射：

class Comment(db.Model):

    __tablename__='comment'

5、尝试：

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'))
    question_id = db.Column(db.Integer,db.ForeignKey('question.id'))
    creat_time = db.Column(db.DateTime, default=datetime.now)
    detail=db.Column(db.Text,nullable=False)
    question=db.relationship('Question',backref=db.backref('comments'))
    author=db.relationship('User',backref=db.backref('comments'))