python设计网站，,系统概要说明现在，随

文章由Byrx.net分享于2020-03-06 03:03:17评论（543）

python设计网站，,系统概要说明现在，随

系统概要说明

现在，随着物联网以及网络技术的飞速发展，互联网已经成为了人们发布与获取信息的重要途径之一，所以通过老师要求，我们设计了一个普通的公司管理信息系统网站。这网站的具有的功能有注册，登录，注销，发布，列表展示，详情页，评论（列表显示），个人中心，搜索，条件组合搜索，文章分类，显示，点赞，收藏，修改密码，上传头像，我的发布（点赞），高级搜索等一系列功能。

一.网站结构设计

技术分享图片

二.模块详细设计

2.1基本功能

<!DOCTYPE html>
<html lang="en">
<head>
 <meta charset="UTF-8">
 <title>{% block title %}{% endblock %}首页</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‘) }}">首页</a>
 <a href="{{ url_for(‘questions‘) }}">提问</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="请输入搜索内容" 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‘) }}">注销</a>
 {% else %}
 <a class="login" href="{{ url_for(‘login‘) }}">登录</a>
 <a class="enroll" href="{{ url_for(‘enroll‘) }}">注册</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>{#链接到相关详情页#}
 <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 }}评论:({{ foo.comments|length }})</a><br>
 </li>
 {% endfor %}
 </ul>
{% endblock %}

</body>

<footer>
 <div class="footer_box">
 版权@LHH
 </div>
</footer>
</html>

首页基本页面显示功能，其中包含提问，搜索，注销，登录，注册等显示

2.2问答详情功能

 {% extends‘base.html‘ %}

{% block title %}问答详情{% 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">题目：{{ questions.title }}<br>
 <small>作者：{{ questions.author.username }} <span class="badge">发布时间：{{ questions.create_time }}</span>
 </small>
 </h3>
 </div>
 <p class="lead" align="center">详情：{{ 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>点赞数：{{ questions.dianzan|length }}</span>
 {% else %}
 <button type="submit">点赞</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>

 {#发布评论#}
 <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="请写下你的评论" style="width:600px; margin: auto"></textarea>
 <input type="hidden" name="questions_id" value="{{ questions.id }}">
 <button type="submit" class="btn btn-default">发送</button>
 </div>

 </form>


 {# 评论列表#}
 <h4 align="center">评论({{ 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 %}

问答详情功能里面包含点赞功能，收藏，评论功能。

2.3注册功能

{% extends‘base.html‘ %}
{% block title %}注册{% 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>注册</h2>
<form action="{{ url_for(‘enroll‘)}}" method="post">
<div class="input_box">
username:<input id="zname" type="text"placeholder="设置您的用户名" name="username"><br>

</div>
<div class="input_box">
password:<input id="zpass1" type="password"placeholder="设置您的密码" name="password"><br>


twowrite:<input id="zpass2" type="password" placeholder="重新输入一样的密码">
</div>
<div class="input_box">
<a href="{{ url_for(‘login‘)}}" style="margin: 10px">已有账号，登录</a>
</div>

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

2.4登录功能

{% extends‘base.html‘%}
{% block title %}登录{% 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>登录</h2>
<form action="{{ url_for(‘login‘)}}" method="post">
<div class="input_box">
username:<input id="uname" type="text"placeholder="请输入用户名" name="username">
</div>
<div class="input_box">
yourname<input id="unickname" type="text"placeholder="请输入昵称" name="nickname">
</div>
<div class="input_box">
password:<input id="upass" type="password"placeholder="请输入密码" name="password">
</div>

<div class="input_box">
<a href="{{ url_for(‘enroll‘)}}">没有账号？立即注册</a>
</div>

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

2.5 发布问答功能

{% extends‘base.html‘%}
{% block title %}发布问答{% endblock %}
{% block head %}
<link rel="stylesheet" href="{{url_for(‘static‘,filename=‘css/questions.css‘) }}" type="text/css">
{% endblock %}

{% block main %}
<div class="box">
<h2>发布问答</h2>
<form action="{{ url_for(‘questions‘)}}" method="post">
<div class="input-box">
<lable for="title">标题</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">详情</lable>
<textarea class="form-control" id="detail" rows="5" cols="50" name="detail"></textarea>
</div>
<input type="checkbox">记住我<br>
<div class="input-box">
<button class="button">发布问答</button>
</div>

</form>
</div>

{% endblock %}

2.6修改密码功能

{% extends‘base.html‘%}
{% block title %}修改密码{% 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>修改密码</h2>
<form action="{{ url_for(‘updata_password‘,user_id=user.id)}}" method="post">
<div class="input_box">
oldpwd:<input id="uname" type="text"placeholder="请输入原密码" name="oldpwd">
</div>
<div class="input_box">
newpwd：<input id="unickname" type="text"placeholder="请输入新密码" name="newpwd">
</div>
<div class="input_box">
newpwd1:<input id="upass" type="password"placeholder="请确认密码" name="newpwd1">
</div>





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

2.7个人中心功能

{%extends "base.html" %}
{% block title %}个人中心{% 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) }}">全部问答</a></li>
<li role="presentation"><a href="{{url_for(‘usercenter‘,user_id=user.id,tag=2) }}">全部评论</a></li>
<li role="presentation"><a href="{{url_for(‘usercenter‘,user_id=user.id,tag=3) }}">个人信息</a></li>
</ul>

{% block user %}{% endblock %}

{% endblock %}

2.8评论功能

{% extends‘user.html‘ %}

{% block user %}
<div class="page-header">
<h3><span class="glyphiconglyphicon-user" aria-hidden="true"></span>{{ username }}<br>
<small>全部评论<span class="badge"></span></small>
</h3>
<ul class="list-group">
{% for foo in comments %}
<li class="list-group-item">
<span class="glyphiconglyphicon-heart-empty" aria-hidden="true"></span>
<a href="{{url_for(‘usercenter‘,user_id=foo.author_id ,tag=2)}}">{{ foo.author.username }}</a>
<span class="badge">{{ foo.create_time }}</span>
<p>{{ foo.detail }}</p>

</li>
{% endfor %}
</ul>
</div>
{% endblock %}

2.9个人信息功能

{% extends‘user.html‘ %}

{% block user %}
<div class="page-header">
<h3><span class="glyphicon glyphicon-user"aria-hidden="true"></span>{{ username }}<br>
<small>个人信息<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 %}
无上传图片
{% 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">上传</button>
</form>
</li>
<li class="list-group-item">用户：{{ user.username }}</li>
<li class="list-group-item">编号：{{ user.id }}</li>
<li class="list-group-item">昵称：{{ nickname }}</li>
<li class="list-group-item">评论次数：{{ comments|length }}</li>
<li class="list-group-item">问答次数：{{ questions|length }}</li>
<li class="list-group-item"><a href="{{url_for(‘updata_password‘,user_id=user.id) }}">修改密码</a></li>
</ul>
</div>
{% endblock %}

三.数据库设计

3.1注册

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 = "用户名要6-12位";
isError=false;
return isError;
}else if ((oZname.value.charCodeAt(0)>=48)&&(oZname.value.charCodeAt(0)<=57)){
oError.innerHTML="首字母必须是字母";
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="用户名只能是字母和数字";
isNotError=false;
return isError;
}
}
if ((oZpass1.value.length< 6)|| (oZpass1.value.length > 12)) {
oError.innerHTML = "密码要6-12位";
isError=false;
return isError;

}else if (oZpass1.value!=oZpass2.value) {
oError.innerHTML = "两次密码不一致";
isError=false;
return isError;
}
return isError;
window.alert("注册成功！")
}

3.2登录

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 = "用户名要6-20位";
isError=false;
return isError;
}else if ((oUname.value.charCodeAt(0)>=48)&&(oUname.value.charCodeAt(0)<=57)){
oError.innerHTML="首字母必须是字母";
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="用户名只能是字母和数字";
isNotError=false;
return isError;
}
}
}
//upass
if ((oUpass.value.length < 6 )||(oUpass.value.length > 20)) {
oError.innerHTML = "密码要6-20位";
isError=false;
return isError;
}
return isError;
window.alert("登录成功！")
}

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.系统实现的关键算法和数据结构

关键算法是if根据前端传到的数据在后台进行比对，再根据传输的code的值进行判断，再根据js文件的判断，在页面上展示出不同的效果。

其中其code值是如何传输的？这就需要调用其中resful文件中，不同类的定义了。

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 importwraps
from datetime importdatetime
from sqlalchemy importor_,and_

from werkzeug.security import generate_password_hash,check_password_hash

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

# 创建用户模型
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)#内部使用
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

#创建发布问答模型
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‘))#外键约束，数据类型db.Integer第二个参数指定外键是user表的id
author=db.relationship(‘User‘,backref=db.backref(‘questions‘))
fenlei=db.relationship(‘Fenlei‘,backref=db.backref(‘questions‘))
# 创建评论模型
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‘)) # 外键约束，数据类型db.Integer第二个参数指定外键是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‘)) # 外键约束，数据类型db.Integer第二个参数指定外键是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)

#登录
@app.route(‘/login/‘,methods={‘GET‘,‘POST‘})
def login():
if request.method==‘GET‘:
return render_template(‘login.html‘)
else:
username = request.form.get(‘username‘) # 获取form中的数据
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‘)) #返回到首页
else:
return u‘password error‘
else:
returnu‘error username orpassword‘ #输出错误

#修改密码
@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 ‘密码输入不一致‘
else:
user.password=newpwd
db.session.commit()
return render_template(‘login.html‘)
else:
return ‘原密码错误‘

#注册
@app.route(‘/enroll/‘,methods={‘GET‘,‘POST‘})
def enroll():
if request.method==‘GET‘:
return render_template(‘enroll.html‘)
else:
username=request.form.get(‘username‘)# 获取form中的数据
password=request.form.get(‘password‘)
nickname=request.form.get(‘nickname‘)
user =User.query.filter(User.username == username).first()
if user:
return u‘usernameexisted‘
else:
user = User(username=username, password=password, nickname=nickname)
db.session.add(user)#数据库操作
db.session.commit()
return redirect(url_for(‘login‘))# 重定向到登录页

#注销
@app.route(‘/logout/‘)
def logout():
session.clear()
return redirect(url_for(‘index‘))# 清除所有数据返回到首页

# 上下文处理器
@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 {}

# 发布前登录：装饰器
def loginFirst(func):# 参数是函数
@wraps(func)
def wrapper(*args,** kwargs):# 定义个函数将其返回
if session.get(‘user‘):
return func(*args,** kwargs)
else:
return redirect(url_for(‘login‘))
return wrapper# 返回一个函数

#提问
@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‘) # 获取form中的数据
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) #保存到数据库
db.session.commit() #提交
return redirect(url_for(‘index‘)) #跳转

# 详情页
@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用在用户详情页判断是否已点赞的按钮
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)

#评论页
@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) #保存到数据库
db.session.commit()# 提交
return redirect(url_for(‘detail‘,questions_id=questions_id))

#用户中心页
@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)

#点赞功能
@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__) # 当前文件所在路径
upload_path = os.path.join(basepath, ‘static/img‘, f.filename) # 注意：没有的文件夹一定要先创建，不然会提示没有该路径
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 ‘HelloWorld!‘

if __name__ == ‘__main__‘:
app.run()

在此次系统中我们放弃了上下文处理器的选择，而重新选择了一种新的函数方法，g函数，g函数是指每次用户登录都会记录和调用其本用户的的数据内容，不需要在后台重新定义一个视图函数在继承在页面中，减少了代码的冗余。提高了数值传递效率。非常的好用，前后台都可以进行使用，只需在hooks文件中添加

五.成品展示

技术分享图片

python设计网站

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