从首页问答标题到问答详情页

主PY文件写视图函数，带id参数。

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

　　

2.首页标题的标签做带参数的链接。

{{ url_for('detail',question_id = foo.id) }}

 <ul class="list-group">
                            {% for each in questions %}
                            <li class="list-group-item" >
                            <a  class="author" href="">{{ each.author.username }}</a>
                            <br>
                        <a class="title"  href="{{ url_for ('detail',question_id=each.id) }}">{{ each.title }}</a>
                                <br>
                                <span >{{ each.create_time }}</span>
                        <p class="abstract">{{ each.detail }}</p>
                            </li>
                            {% endfor %}
                        </ul>

　　

3.在详情页将数据的显示在恰当的位置。

 <ul class="list-group">
                            <a  class="author" href="">{{ ques.author.username }}</a>
                            <br>
                        <a class="title"  href="">{{ ques.title }}</a>
                                <br>
                                <span >{{ ques.create_time }}</span>
                        <p class="abstract">{{ ques.detail }}</p>

                        <form action="">
                        <div class="form-group">
                        <textarea class="inputFramework" rows="6" id="details" name="detail"></textarea>

                        </div>
                            <button type="submit" class="btn btn-default">发送</button>
                                </form>

                        </ul>

　　

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

　　

5.尝试实现发布评论。