django实现注册登录小系统

Posted 2020-09-03 lingwang3

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1.创建django项目：

命令：django-admin.py startproject todoManager

2.在此项目下创建apps应用

命令：python manage.py startapp apps

目录如下：

3.打开todoManager/todoManager/settings.py文件，将应用添加进去：

4.打开todoManager/todoManager/settings.py文件，设置连接数据库，以下连接的是mysql

5.打开todoManager/apps/models.py文件，添加如下内容，创建数据库，创建User表，用户名和密码两个字段。

6.进行数据库的同步：

查看django版本：输入python ，enter;import django django.get_version()

我的版本是1.9之前的：在Django1.9之前，数据库同步只需要一条命令，那就是python manage.py syncdb

在1.9之后，python manage.py makemigrations;python manage.py migrate。

修改原有app模块中的module中的属性。

1、rm -rf ./ops/migrations #先进入所在app模块中，删除 migrations 目录

2、mkdir ./ops/migrations #创建migrations

3、python manage.py makemigrations ops #更新migrations 中对module的记录

4、python manage.py migrate #同步数据库

后生成的 apps_user 表就是我们models.py 中所创建的User类。

如果没有提示生成超级用户：

python manage.py createsuperuser

7. 配置URL

7.1 打开todoManager/todoManager/urls.py

7.2 在todoManager/apps/目录下创建urls.py文件：

from django.conf.urls import patterns, url,include
from django.contrib import admin
from apps import views

urlpatterns = patterns(\'\',
url(r\'^regist/$\',views.regist,name = \'regist\'),
url(r\'^login/$\',views.login,name = \'login\'),
url(r\'^index/$\',views.index,name = \'index\'),
url(r\'^logout/$\',views.logout,name = \'logout\'),

)

7.3 创建视图

打开todoManager/apps/views.py 文件：

# -*- coding: utf-8 -*-
from django.shortcuts import render

# Create your views here.
#coding=utf-8
from django.shortcuts import render,render_to_response
from django.http import HttpResponse,HttpResponseRedirect
from django.template import RequestContext
from django import forms
from apps.models import  User
from pymongo import MongoClient
from django.views.decorators.csrf import csrf_protect, csrf_exempt
 
mongo_client = MongoClient(\'192.168.86.126\', 27017)

#表单
class UserForm(forms.Form):
    username = forms.CharField(label=u\'用户名\',max_length=100)
    password = forms.CharField(label=u\'密  码\',widget=forms.PasswordInput())


#注册
# @csrf_protect 
def regist(req):
    if req.method == \'POST\':
        uf = UserForm(req.POST)
        if uf.is_valid():
            #获得表单数据
            username = uf.cleaned_data[\'username\']
            password = uf.cleaned_data[\'password\']
            #添加到数据库
            User.objects.create(username= username,password=password)
            return HttpResponse(\'regist success!!\')
    else:
        uf = UserForm()
    return render_to_response(\'regist.html\',{\'uf\':uf}, context_instance=RequestContext(req))

#登陆
# @csrf_protect 
def login(req):
    username = req.COOKIES.get(\'username\',\'\') 
    if req.method == \'POST\':
        uf = UserForm(req.POST)
        if uf.is_valid():
            #获取表单用户密码
            username = uf.cleaned_data[\'username\']
            password = uf.cleaned_data[\'password\']
            #获取的表单数据与数据库进行比较
            user = User.objects.filter(username__exact = username,password__exact = password) 
            if user:
                #比较成功，跳转index
                response = HttpResponseRedirect(\'/apps/index/\') 
                #将username写入浏览器cookie,失效时间为3600
                response.set_cookie(\'username\',username,3600)
                return response
            else:
                #比较失败，还在login
                return HttpResponseRedirect(\'/apps/login/\')
    else: 
        uf = UserForm()
    return render_to_response(\'login.html\',{\'uf\':uf}, context_instance=RequestContext(req) )

#登陆成功
# @csrf_protect 
def index(req): 
    username = req.COOKIES.get(\'username\',\'\') 
    if username:
        key_words_coll = mongo_client[\'yidong_zixun\'][\'key_words\']
        categorys = {} 
        tasks = {}
        results = key_words_coll.find().batch_size(30)
        for result in results:
            category_id = result["category_id"]
            category_name = result["category_name"]
            _id = result["_id"]
            name = result["name"]
            if not categorys.has_key(category_id): 
                categorys[category_id] = category_name 
            if not tasks.has_key(category_id):
                tasks[category_id] = []
                tasks[category_id].append({"task_id":_id,"name":name})
            else:
                tasks[category_id].append({"task_id":_id,"name":name}) 
        return render_to_response(\'index.html\' ,{\'username\':username,\'categorys\':categorys,"tasks":tasks}, context_instance=RequestContext(req))
    else:
        return HttpResponseRedirect(\'/apps/login/\')  
#退出
# @csrf_protect
def logout(req):
    # response = HttpResponse(\'logout !!\') 
    response = HttpResponseRedirect(\'/apps/login/\') 
    response.delete_cookie(\'username\') 
    return response