python設計網站

本文轉載自查看原文 2018-06-15 18:48 1994

系統概要說明

現在，隨着物聯網以及網絡技術的飛速發展，互聯網已經成為了人們發布與獲取信息的重要途徑之一，所以通過老師要求，我們設計了一個普通的公司管理信息系統網站。這網站的具有的功能有注冊，登錄，注銷，發布，列表展示，詳情頁，評論（列表顯示），個人中心，搜索，條件組合搜索，文章分類，顯示，點贊，收藏，修改密碼，上傳頭像，我的發布（點贊），高級搜索等一系列功能。

一.網站結構設計

二.模塊詳細設計

2.1基本功能

<!DOCTYPE html>

<html lang="en">

<head>

    <meta charset="UTF-8">

    <title>{% block title %}{% endblock %}首頁</title>

    <!-- 新 Bootstrap 核心 CSS 文件 -->

    <link href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">

    <script src="https://cdn.bootcss.com/jquery/2.1.1/jquery.min.js"></script>

    <!-- 最新的 Bootstrap 核心 JavaScript 文件 -->

    <script src="https://cdn.bootcss.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>

    <script src="{{ url_for('static',filename='js/switch.js') }}"></script>

    <link rel="stylesheet"  type="text/css" href="{{ url_for('static',filename='css/base.css') }}">



{% block head %}{% endblock %}

</head>

<body id="myBody" style="background-image:url(/static/img/2345_image_file_copy_4.jpg)">

<nav class="navbar">

    <img src="{{ url_for('static',filename='img/1.jpg') }}" alt="" width="50px">

    <a href="{{ url_for('index') }}">首頁</a>

    <a href="{{ url_for('questions') }}">提問</a>

    <form action="{{ url_for('search')}}" method="get" class="navbar-form navbar-right">

    <input name="q" type="text" name="title" required lay-verify="required" placeholder="請輸入搜索內容" autocomplete="off"

           class="layui-input">

    <button class="seek" style="padding-left: 10px;" type="submit">搜索</button>

    </form>

{% if username %}

    <a href="{{ url_for('usercenter',user_id=user.id,tag=1) }}">{{user.username }}</a>

{#    <a href="#">{{ username }}</a>#}

    <a href="{{ url_for('logout') }}">注銷</a>

    {% else %}

    <a class="login" href="{{ url_for('login') }}">登錄</a>

    <a class="enroll" href="{{ url_for('enroll') }}">注冊</a>

{% endif %}

    <img id="myOnOff" onclick="mySwitch()" src="http://www.runoob.com/images/pic_bulbon.gif" width="25px">

</nav>









{% block main %}

<div>

    <ul>

        {% for foo in fenlei %}

        <li><a href="{{url_for('index',bd= foo.id)}}">{{foo.name}}</a></li>

        {% endfor %}

    </ul>

</div>

    <ul class="list-group">

        {% 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; width: 600px;margin: auto">

                <span class="glyphicon glyphicon-leaf" aria-hidden="true"></span>

                <a href="{{ url_for('detail',questions_id=foo.id) }}">{{ foo.title }}</a>{#鏈接到相關詳情頁#}

                <span class="badge" >{{ foo.create_time }}</span>

                <p style="margin: 20px">{{ foo.detail }}</p>

                <span class="glyphicon glyphicon-user" aria-hidden="true"></span>

                <a href="{{ url_for('usercenter',user_id=foo.author_id,tag=1) }}">{{ foo.author.username }}評論:({{ foo.comments|length }})</a><br>

            </li>

        {% endfor %}

    </ul>

{% endblock %}



</body>



<footer>

    <div class="footer_box">

        版權@LHH

    </div>

</footer>

</html>

首頁基本頁面顯示功能，其中包含提問，搜索，注銷，登錄，注冊等顯示

2.2問答詳情功能

   {% extends'base.html' %}



{% block title %}問答詳情{% endblock %}

{% block head %}

    <link rel="stylesheet" type="text/css" href="{{ url_for('static',filename='css/detail.css') }}">

{% endblock %}



{% block main %}

    <div class="page-header">

        <h3 align="center">題目：{{ questions.title }}<br>

            <small>作者：{{ questions.author.username }} <span class="badge">發布時間：{{ questions.create_time }}</span>

            </small>

        </h3>

    </div>

    <p class="lead" align="center">詳情：{{ questions.detail }}</p><br>



    <form action="{{ url_for('dianzan') }}"method="post" >



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

        <input type="hidden" name="user_id" value="{{ userid }}">

        {% if dzyes %}

            <span>點贊數：{{ questions.dianzan|length }}</span>

        {% else %}

            <button type="submit">點贊</button>

        {% endif %}

    </form>

    <form action="{{ url_for('collection') }}" method="post">

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

        <input type="hidden" name="user_id" value="{{ userid }}">

        {% if collection %}

            <span>已收藏</span>

        {% else %}

            <button type="submit">收藏</button>

        {% endif %}

    </form>



    {#發布評論#}

    <form action="{{ url_for('comments') }}" method="post" style="margin: 20px">

        <div class="form-group" align="center">

            <textarea name="new_comment" class="form-control" rows="3" id="new-comment"

                      placeholder="請寫下你的評論" style="width:600px; margin: auto"></textarea>

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

            <button type="submit" class="btn btn-default">發送</button>

        </div>



    </form>





    {# 評論列表#}

    <h4 align="center">評論({{ questions.comments|length }})</h4>

    <ul class="list-group" style="margin: 10px">

        {% for foo in  questions.comments %}

            <li class="list-group-item" style="width: 600px ;margin: auto">

                <span class="glyphicon glyphicon-heart-empty" aria-hidden="true"></span>

                <a href="{{ url_for('usercenter',user_id=foo.author.id,tag=1) }}">{{ foo.author.username }}</a>

                <span class="badge">{{ foo.create_time }}</span>

                <p>{{ foo.detail }}</p>

            </li>

        {% endfor %}

    </ul>

{% endblock %}

問答詳情功能里面包含點贊功能，收藏，評論功能。

2.3注冊功能

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

{% block main %}
<div class="box">
    <h2>注冊</h2>
    <form action="{{ url_for('enroll') }}" method="post">
    <div class="input_box">
        username:<input id="zname" type="text"placeholder="設置您的用戶名" name="username"><br>
        
    </div>
    <div class="input_box">
        password:<input id="zpass1" type="password"placeholder="設置您的密碼" name="password"><br>
    
    
        twowrite:<input id="zpass2" type="password" placeholder="重新輸入一樣的密碼">
    </div>
        <div class="input_box">
        <a href="{{ url_for('login') }}" style="margin: 10px">已有賬號，登錄</a>
    </div>

    <div id="error_box"><br></div>
    <div class="input_box">
        <button class="button" onclick="fnEnroll()">立即注冊</button>
    </div>
    </form>
</div>
{% endblock %}

2.4登錄功能

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

{% block main %}

<div class="box">
    <h2>登錄</h2>
    <form action="{{ url_for('login') }}" method="post">
    <div class="input_box">
        username:<input id="uname" type="text"placeholder="請輸入用戶名" name="username">
    </div>
    <div class="input_box">
        yourname<input id="unickname" type="text"placeholder="請輸入昵稱" name="nickname">
    </div>
    <div class="input_box">
        password:<input id="upass" type="password"placeholder="請輸入密碼" name="password">
    </div>

    <div class="input_box">
        <a href="{{ url_for('enroll') }}">沒有賬號？立即注冊</a>
    </div>

    <div id="error_box"><br></div>
    <div class="input_box">
        <button class="button" onclick="fnLogin()">登錄</button>
    </div>
    </form>
</div>
{% endblock %}

2.5 發布問答功能

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

{% block main %}
    <div class="box">
        <h2>發布問答</h2>
        <form action="{{ url_for('questions') }}" method="post">
            <div class="input-box">
                <lable for="title">標題</lable>
                <textarea class="form-control" id="title" rows="1" cols="50" name="title"></textarea>
            </div>
            <div class="input-box">
                <select name="fenlei_id" id="">
                    {% for foo in fenlei %}
                    <option value="{{foo.id}}">{{foo.name}}</option>
                     {% endfor %}
                </select>
            </div>
            <div class="input-box">
                <lable for="detail">詳情</lable>
                <textarea class="form-control" id="detail" rows="5" cols="50" name="detail"></textarea>
            </div>
            <input type="checkbox">記住我<br>
            <div class="input-box">
                <button class="button">發布問答</button>
            </div>

        </form>
    </div>

{% endblock %}

2.6修改密碼功能

{% extends'base.html' %}
{% block title %}修改密碼{% endblock %}
{% block head %}
    <link rel="stylesheet" type="text/css" href="{{ url_for('static',filename='css/login.css') }}">
    <script src="{{ url_for('static',filename='/js/login.js')}}"></script>
{% endblock %}

{% block main %}

<div class="box">
    <h2>修改密碼</h2>
    <form action="{{ url_for('updata_password',user_id=user.id) }}" method="post">
    <div class="input_box">
        oldpwd:<input id="uname" type="text"placeholder="請輸入原密碼" name="oldpwd">
    </div>
    <div class="input_box">
        newpwd：<input id="unickname" type="text"placeholder="請輸入新密碼" name="newpwd">
    </div>
    <div class="input_box">
        newpwd1:<input id="upass" type="password"placeholder="請確認密碼" name="newpwd1">
    </div>

    
        
    

    <div id="error_box"><br></div>
    <div class="input_box">
        <button class="button" type="submit" onclick="fnLogin()">登錄</button>
    </div>
    </form>
</div>
{% endblock %}

2.7個人中心功能

{% extends "base.html" %}
{% block title %}個人中心{% endblock %}
{% block head %}
    <style>
        .nav nav-tabs li{
            list-style: none;
            float: left;
            margin: 25px;
        }

    </style>
{% endblock %}

{% block main %}
    <h3><span class="glyphicon glyphicon-user" aria-hidden="true"></span>{{ user.username }}</h3>
    <ul class="nav nav-tabs">
    <li role="presentation"><a href="{{ url_for('usercenter',user_id=user.id,tag=1) }}">全部問答</a></li>
    <li role="presentation"><a href="{{ url_for('usercenter',user_id=user.id,tag=2) }}">全部評論</a></li>
    <li role="presentation"><a href="{{ url_for('usercenter',user_id=user.id,tag=3) }}">個人信息</a></li>
    </ul>

    {% block user %}{% endblock %}

{% endblock %}

2.8評論功能

2.9個人信息功能

{% extends 'user.html' %}

{% block user %}
    <div class="page-header">
    <h3><span class="glyphicon glyphicon-user" aria-hidden="true"></span>{{ username }}<br>
        <small>個人信息<span class="badge"></span></small>
    </h3>
    <ul class="list-group">
        <li class="list-group-item">
            {% if user.img %}
                <img src="/static/{{ user.img }}" alt="" width="150px" height="200px">
            {% else %}
                 無上傳圖片
            {% endif %}
            <form action="{{ url_for('img',user_id=user.id )}}" method="post" enctype="multipart/form-data">
            <input type="file" required name="img">
        <button type="submit">上傳</button>
                </form>
        </li>
        <li class="list-group-item">用戶：{{ user.username }}</li>
        <li class="list-group-item">編號：{{ user.id }}</li>
        <li class="list-group-item">昵稱：{{ nickname }}</li>
        <li class="list-group-item">評論次數：{{ comments|length }}</li>
        <li class="list-group-item">問答次數：{{ questions|length }}</li>
        <li class="list-group-item"><a href="{{ url_for('updata_password',user_id=user.id) }}">修改密碼</a></li>
    </ul>
</div>
{% endblock %}

三.數據庫設計

3.1注冊

function fnEnroll() {
            var oZname=document.getElementById("zname");
            var oZpass1=document.getElementById("zpass1");
            var oZpass2=document.getElementById("zpass2");
            var oError=document.getElementById("error_box");
            var isError=true;

            oError.innerHTML="<br>"

            if ((oZname.value.length < 6) || (oZname.value.length > 12)) {
                oError.innerHTML = "用戶名要6-12位";
                isError=false;
                return isError;
            }else if ((oZname.value.charCodeAt(0)>=48)&&(oZname.value.charCodeAt(0)<=57)){
                oError.innerHTML="首字母必須是字母";
                isError=false;
                return isError;
            }else for(var i=0;i<oZname.value.length;i++){
                if ((oZname.value.charCodeAt(i)<48)||(oZname.value.charCodeAt(i)>57)&&(oZname.value.charCodeAt(i)<97) ||(oZname.value.charCodeAt(i)>122)){
                    oError.innerHTML="用戶名只能是字母和數字";
                    isNotError=false;
                    return isError;
                }
            }
            if ((oZpass1.value.length < 6) || (oZpass1.value.length > 12)) {
                oError.innerHTML = "密碼要6-12位";
                isError=false;
                return isError;

            }else if (oZpass1.value!= oZpass2.value) {
                oError.innerHTML = "兩次密碼不一致";
                isError=false;
                return isError;
            }
            return isError;
    window.alert("注冊成功！")
        }

3.2登錄

function fnLogin() {
            var oUname=document.getElementById("uname");
            var oUpass=document.getElementById("upass");
            var oError=document.getElementById("error_box");
            var isError=true;
            oError.innerHTML="<br>"

             //uname
            if ((oUname.value.length < 6) || (oUname.value.length > 20)) {
                oError.innerHTML = "用戶名要6-20位";
                isError=false;
                return isError;
            }else if ((oUname.value.charCodeAt(0)>=48)&&(oUname.value.charCodeAt(0)<=57)){
                oError.innerHTML="首字母必須是字母";
                isError=false;
                return isError;
            }else {
                for(var i=0;i<oUname.value.length;i++){
                    if ((oUname.value.charCodeAt(i)<48)||(oUname.value.charCodeAt(i)>57)&&(oUname.value.charCodeAt(i)<97) ||(oUname.value.charCodeAt(i)>122)){
                        oError.innerHTML="用戶名只能是字母和數字";
                        isNotError=false;
                        return isError;
                    }
                }
            }
            //upass
            if ((oUpass.value.length < 6 )|| (oUpass.value.length > 20)) {
                oError.innerHTML = "密碼要6-20位";
                isError=false;
                return isError;
            }
            return isError;
    window.alert("登錄成功！")
        }

3.3其他

function mySwitch() {
    var oBody = document.getElementById("myBody");
    var oOnOff = document.getElementById("myOnOff");
    if (oOnOff.src.match("bulbon")) {
        oOnOff.src = "http://www.runoob.com/images/pic_bulboff.gif";
        oBody.style.background = "black";
        oBody.style.color = "white";
    } else {
        oOnOff.src = "http://www.runoob.com/images/pic_bulbon.gif";
        oBody.style.background = "white";
        oBody.style.color = "black";

    }
}

四.系統實現的關鍵算法和數據結構

關鍵算法是if根據前端傳到的數據在后台進行比對，再根據傳輸的code的值進行判斷，再根據js文件的判斷，在頁面上展示出不同的效果。

其中其code值是如何傳輸的？這就需要調用其中resful文件中，不同類的定義了。

import os
DEBUG=True
SECRET_KEY=os.urandom(24)

SQLALCHEMY_DATABASE_URI = 'mysql+pymysql://root:@127.0.0.1:3306/mytest1?charset=utf8'
SQLALCHEMY_TRACK_MODIFICATIONS = False

from flask import Flask, render_template, request, redirect, url_for, session,g
from flask_sqlalchemy import SQLAlchemy
import config,os
from functools import wraps
from datetime import datetime
from sqlalchemy import or_,and_

from werkzeug.security import generate_password_hash,check_password_hash

app=Flask(__name__)
app.config.from_object(config)
db=SQLAlchemy(app)

# 創建用戶模型
class User(db.Model):
    __tablename__ = 'user'
    id = db.Column(db.Integer,primary_key=True,autoincrement=True)
    username = db.Column(db.String(20),nullable=False)
    _password = db.Column(db.String(200),nullable=False)#內部使用
    img= db.Column(db.String(200))
    nickname=db.Column(db.String(50))

    @property
    def password(self): # 外部使用
        return self._password

    @password.setter
    def password(self,row_password):
        self._password = generate_password_hash(row_password)

    def check_password(self,row_password):
        result = check_password_hash(self._password,row_password)
        return result

#創建發布問答模型
class Question(db.Model):
    __tablename__ ='questions'
    id = db.Column(db.Integer, primary_key=True, autoincrement=True)
    title=db.Column(db.String(100),nullable=False)
    detail=db.Column(db.Text,nullable=False)
    create_time=db.Column(db.DateTime,default=datetime.now)
    fenlei_id = db.Column(db.Integer,db.ForeignKey('fenlei.id'))
    author_id=db.Column(db.Integer,db.ForeignKey('user.id'))#外鍵約束，數據類型db.Integer第二個參數指定外鍵是user表的id
    author=db.relationship('User',backref=db.backref('questions'))
    fenlei=db.relationship('Fenlei',backref=db.backref('questions'))
# 創建評論模型
class Comment(db.Model):
    __tablename__ = 'comments'
    id = db.Column(db.Integer, primary_key=True, autoincrement=True)
    author_id = db.Column(db.Integer, db.ForeignKey('user.id'))
    questions_id = db.Column(db.Integer, db.ForeignKey('questions.id'))
    create_time=db.Column(db.DateTime, default=datetime.now)
    detail=db.Column(db.Text,nullable=False)
    questions=db.relationship('Question',backref=db.backref('comments',order_by=create_time.desc))
    author=db.relationship('User',backref=db.backref('comments'))

class Fenlei(db.Model):
    __tablename__='fenlei'
    id = db.Column(db.Integer, primary_key=True, autoincrement=True)
    name = db.Column(db.String(100))

class Dianzan(db.Model):
    __tablename__ = 'dianzan'
    id = db.Column(db.Integer, primary_key=True, autoincrement=True)
    user_id = db.Column(db.Integer, db.ForeignKey('user.id')) # 外鍵約束，數據類型db.Integer第二個參數指定外鍵是user表的id
    questions_id = db.Column(db.Integer, db.ForeignKey('questions.id'))
    user = db.relationship('User', backref=db.backref('dianzan'))
    question = db.relationship('Question', backref=db.backref('dianzan'))

class Collection(db.Model):
    __tablename__ = 'collection'
    id = db.Column(db.Integer, primary_key=True, autoincrement=True)
    user_id = db.Column(db.Integer, db.ForeignKey('user.id')) # 外鍵約束，數據類型db.Integer第二個參數指定外鍵是user表的id
    questions_id = db.Column(db.Integer, db.ForeignKey('questions.id'))
    create_time = db.Column(db.DateTime, default=datetime.now)
    user = db.relationship('User', backref=db.backref('collection'))
    question = db.relationship('Question', backref=db.backref('collection'))

db.create_all()

@app.route('/')
def index():
    fenleiid= request.args.get('bd',type=int,default=None)
    if fenleiid:
        questions = Question.query.filter_by(fenlei_id=fenleiid)
    else:
        questions= Question.query.order_by('-create_time').all()
    context={
        "questions":questions,
        "fenlei":Fenlei.query.all()
    }
    return render_template('base.html',**context)

#登錄
@app.route('/login/',methods={'GET','POST'})
def login():
    if request.method=='GET':
        return render_template('login.html')
    else:
        username = request.form.get('username') # 獲取form中的數據
        password = request.form.get('password')
        nickname = request.form.get('nickname')
        user = User.query.filter(User.username == username).first()
        # id = User.query.filter(User.id == id).first()
        if user:
            if user.check_password(password):
                session['user'] = username
                session['id'] = user.id
                session.permanent=True
                return redirect(url_for('index')) # 返回到首頁
            else:
                return u'password error'
        else:
            return u'error username or password' #輸出錯誤

#修改密碼
@app.route('/updata_password/<user_id>',methods={'GET','POST'})
def updata_password(user_id):
    if request.method=='GET':
        return render_template('updata_password.html')
    else:
        oldpwd = request.form.get('oldpwd')
        newpwd = request.form.get('newpwd')
        newpwd1= request.form.get('newpwd1')
        user= User.query.filter(User.id==user_id).first()
        if user.check_password(oldpwd):
            if newpwd !=newpwd1:
                return '密碼輸入不一致'
            else:
                user.password=newpwd
                db.session.commit()
                return render_template('login.html')
        else:
            return '原密碼錯誤'

#注冊
@app.route('/enroll/',methods={'GET','POST'})
def enroll():
    if request.method=='GET':
        return render_template('enroll.html')
    else:
        username=request.form.get('username')# 獲取form中的數據
        password=request.form.get('password')
        nickname=request.form.get('nickname')
        user = User.query.filter(User.username == username).first()
        if user:
            return u'username existed'
        else:
            user = User(username=username, password=password, nickname=nickname)
            db.session.add(user)#數據庫操作
            db.session.commit()
            return redirect(url_for('login'))# 重定向到登錄頁

#注銷
@app.route('/logout/')
def logout():
    session.clear()
    return redirect(url_for('index'))# 清除所有數據返回到首頁

# 上下文處理器
@app.context_processor
def mycontext():
    usern=session.get('user')
    userid = session.get('userid')
    # id=session.get('id')
    if usern:
        user = User.query.filter(User.username==usern).first()

        return {'username':usern,'user':user,
                  'userid':user.id
                }
    else:
        return {}

# 發布前登錄：裝飾器
def loginFirst(func):# 參數是函數
    @wraps(func)
    def wrapper(*args, ** kwargs):# 定義個函數將其返回
        if session.get('user'):
            return func(*args, ** kwargs)
        else:
            return redirect(url_for('login'))
    return wrapper# 返回一個函數

#提問
@app.route('/questions/',methods=['GET','POST'])
@loginFirst
def questions():
    if request.method == 'GET':
        fenlei = Fenlei.query.all()
        return render_template('questions.html',fenlei=fenlei)
    else:
        title = request.form.get('title') # 獲取form中的數據
        detail = request.form.get('detail')
        fenlei_id = request.form.get('fenlei_id')
        author_id = User.query.filter(User.username == session.get('user')).first().id
        questions = Question(title=title, detail=detail, author_id=author_id ,fenlei_id=fenlei_id)
        db.session.add(questions) # 保存到數據庫
        db.session.commit() # 提交
        return redirect(url_for('index')) # 跳轉

# 詳情頁
@app.route('/detail/<questions_id>', methods=['GET', 'POST'])
def detail(questions_id):
    questions = Question.query.filter(Question.id == questions_id).first()
    # user_id = request.form.get('user_id')
    dzyes = Dianzan.query.filter( # dzyes用在用戶詳情頁判斷是否已點贊的按鈕
        and_(
            Dianzan.user_id ==session.get('id'),Dianzan.questions_id == questions.id
        )
    ).first()
    collection = Collection.query.filter(
        and_(
            Collection.user_id ==session.get('id'), Collection.questions_id == questions.id
        )
    ).first()
    return render_template('detail.html', questions=questions,dzyes=dzyes,collection=collection)

#評論頁
@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) # 保存到數據庫
    db.session.commit() # 提交
    return redirect(url_for('detail',questions_id=questions_id))

#用戶中心頁
@app.route('/usercenter/<user_id>/<tag>')
@loginFirst
def usercenter(user_id,tag):
    user=User.query.filter(User.id==user_id).first()
    context={
        'user':user,
        # 'username':user.username,
        'questions':user.questions,
        'comments':user.comments
    }
    if tag=='1':
        return render_template('usercenter1.html',**context)
    elif tag=='2':
        return render_template('usercenter2.html',**context)
    else:
        return render_template('usercenter3.html',**context)
    # return render_template('usercenter.html',**context)

@app.route('/search/')
def search():
    qu = request.args.get('q')
    ques = Question.query.filter(
        or_(
        Question.title.contains(qu),
        Question.detail.contains(qu)
        )
    )
    return render_template('base.html',questions=ques)

#點贊功能
@app.route('/dianzan/',methods=['GET','POST'])
@loginFirst
def dianzan():
    user_id=request.form.get('user_id')
    questions_id=request.form.get('questions_id')
    dianzan=Dianzan(user_id=user_id,questions_id=questions_id)
    db.session.add(dianzan)
    db.session.commit()
    return redirect(url_for('detail',questions_id=questions_id))
#收藏功能
@app.route('/collection/',methods=['GET','POST'])
@loginFirst
def collection():
    user_id=request.form.get('user_id')
    questions_id=request.form.get('questions_id')
    collection=Collection(user_id=user_id,questions_id=questions_id)
    db.session.add(collection)
    db.session.commit()
    return redirect(url_for('detail',questions_id=questions_id))

@app.route('/img/<user_id>',methods=['GET','POST'])
@loginFirst
def img(user_id):
     user = User.query.filter(User.id == user_id).first()
     f = request.files['img']
     basepath = os.path.dirname(__file__) # 當前文件所在路徑
     upload_path = os.path.join(basepath, 'static/img', f.filename) # 注意：沒有的文件夾一定要先創建，不然會提示沒有該路徑
     f.save(upload_path)
     user.img = 'img/' + f.filename
     db.session.commit()
     return redirect(url_for('usercenter',tag=3,user_id=user.id))

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

from flask import Flask

app = Flask(__name__)

@app.route('/')
def hello_world():
return 'Hello World!'

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

在此次系統中我們放棄了上下文處理器的選擇，而重新選擇了一種新的函數方法，g函數，g函數是指每次用戶登錄都會記錄和調用其本用戶的的數據內容，不需要在后台重新定義一個視圖函數在繼承在頁面中，減少了代碼的冗余。提高了數值傳遞效率。非常的好用，前后台都可以進行使用，只需在hooks文件中添加

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