首页列表显示全部问答，完成问答详情页布局。

1. 首页列表显示全部问答：
   1. 将数据库查询结果传递到前端页面 Question.query.all()
   2. 前端页面循环显示整个列表。
   3. 问答排序
2. 完成问答详情页布局：
   1. 包含问答的全部信息
   2. 评论区
   3. 以往评论列表显示区。
3. 在首页点击问答标题，链接到相应详情页。

#-*- coding: utf-8 -*-
from flask import Flask,request,render_template,redirect,url_for,session
from flask_sqlalchemy import SQLAlchemy
import sqlconnect
from functools import wraps
from  datetime import datetime



app = Flask(__name__)
app.config.from_object(sqlconnect)#app连接数据库
db = SQLAlchemy(app)

class User(db.Model):
    __tablename__ ='user1'
    id = db.Column(db.Integer,primary_key=True,autoincrement=True)
    username = db.Column(db.String(20),nullable=False)
    password = db.Column(db.String(20), nullable=False)
    #againpass = db.Column(db.String(20), nullable=False)

class Question(db.Model):
    __tablename__='question'
    id = db.Column(db.Integer,primary_key=True,autoincrement=True)
    author_id = db.Column(db.Integer,db.ForeignKey('user1.id'))
    title = db.Column(db.String(100),nullable=False)
    detail = db.Column(db.Text,nullable=False)
    creat_time = db.Column(db.DateTime,default=datetime.now)
    author = db.relationship('User', backref=db.backref('questions'))


class Trip(db.Model):
    __tablename__='trips'
    id = db.Column(db.Integer,primary_key=True,autoincrement=True)
    author_id = db.Column(db.Integer,db.ForeignKey('user1.id'))
    ttitle = db.Column(db.String(100),nullable=False)
    loca = db.Column(db.String(100),nullable=False)
    feeling =db.Column(db.Text,nullable=False)
    creat_time = db.Column(db.DateTime,default=datetime.now)
    author = db.relationship('User', backref=db.backref('trips'))

db.create_all()

#增加
user = User(username ='qqqqqq',password ='qqqqqq')
db.session.add(user)
db.session.commit()
#查找
# user = User.query.filter(User.username =='xxxxx1').first()
# user.password ='123456'
# user.againpass='123456'
# print(user.id,user.username,user.password)
#删除
# user = User.query.filter(User.username =='xxxxx1').first()
# db.session.delete(user)
# db.session.commit()

@app.route('/')
def first():
    context={
      'visit':Trip.query.all()
    }
    return render_template("first.html",**context)

def login_re(func):
    @wraps(func)
    def wrapper(*args,**kwargs):
        if session.get('user'):
            return func(*args,**kwargs)
        else:
            return redirect(url_for('sign_in'))
    return wrapper

@app.context_processor
def mycontext():
    usern = session.get('user')
    if usern:
        return{'username':usern}
    else:
        return {}

@app.route('/logout/')
def logout():
    session.clear()
    return redirect(url_for('first'))

@app.route("/login/",methods=['GET','POST'])
def sign_in():
    if request.method =='GET':
        return render_template("sign_in.html")
    else:
        name = request.form.get('name')
        passw = request.form.get('password')
        user = User.query.filter(User.username == name).first()
        #判断用户名是否存在
        if user:
            #判断密码是否正确
            if user.password == passw:
                session['user']=name#记住用户名
                return redirect(url_for('first'))
            else:
                return u'密码错误！'
        else:
            return u'不存在该用户名！'


@app.route("/regiter/",methods=['GET','POST'])
def sign_up():
    if request.method == 'GET':
        return render_template("sign_up.html")
    else:
        name = request.form.get('newname')
        passw = request.form.get('newpass')
        samename = User.query.filter(User.username == name).first()
        if samename:
            return u'username existed!'

        else:
            # 将用户名和密码存入数据库
            users =User(username = name ,password = passw)
            db.session.add(users)
            db.session.commit()
            return render_template("sign_in.html")#注册成功后跳转到登录界面


@app.route("/question/",methods=['GET','POST'])
@login_re
def question():
    if request.method=='GET':
        return render_template("wenda.html")
    else:
        wenti1 = request.form.get('q')
        # wenti2 = wenti1.decode("gbk").encode("utf-8")
        xiangqin1 = request.form.get('d')
        # xiangqin2 = xiangqin1.decode("gbk").encode("utf-8")
        questions = Question(title =wenti1,detail = xiangqin1)
        db.session.add(questions)
        db.session.commit()
        return render_template("first.html")

@app.route("/trip/",methods=['GET','POST'])
@login_re
def trip():
    if request.method=='GET':
        return render_template("trip.html")
    else:
        ttitle = request.form.get('biaoti')
        location = request.form.get('locat')
        feel = request.form.get('feel')
        trips = Trip(ttitle =ttitle,loca = location,feeling=feel)
        db.session.add(trips)
        db.session.commit()
        return render_template("first.html")

@app.route('/tripdetial/')
def td():
    return render_template("tripdetial.html")

if __name__ == '__main__':
    app.run(debug=True)

{% extends 'base.html' %}
{% block title %}
首页
{% endblock %}
{% block head %}
    <link href="{{ url_for('static',filename='zz.css') }}" rel="stylesheet" type="text/css">
{% endblock %}

{% block main %}
<body bgcolor="#696969">
    <ul class="trip-list" >
        {% for t in visit %}
            <li class="trip">
                <span class="" aria-hidden="true"></span>
                <a class="picture">
                    <img src="../static/image/tx1.png">
                </a>
                <a href="http://127.0.0.1:5000/tripdetial">{{ t.author.username }}</a>
                <span class="createtime">{{ t.creat_time }}</span>
                <br>
                <br>
                <a href="http://127.0.0.1:5000/tripdetial">{{ t.ttitle }}</a>
                <p class="">{{ t.detial }}</p>
                <p class="location">{{ t.loca }}</p>
            </li>
        {% endfor %}


    </ul>


</body>
{% endblock %}

{% extends 'base.html' %}
{% block title %}

{% endblock %}
{% block head %}
    <link href="{{ url_for('static',filename='zz.css') }}" rel="stylesheet" type="text/css">
{% endblock %}

{% block main %}
<body bgcolor="#696969">
    <div class="">
        <a href="#">username</a>
        <span class="createtime">create_time</span>
        <p class="location">location</p>
    </div>
    <HR align=center width=1500 color=#987cb9 SIZE=1>
    <div>
        <p class="#">title</p>
        <br>
        <p class="">detial</p>
    </div>






</body>
{% endblock %}