Django_簡單的資料庫互動案例
阿新 • • 發佈：2018-12-02
https://www.jianshu.com/p/bd0af02e59ba
一、頁面展示
做一個簡單的資料庫交換的練習案例
頁面.png
二、建立mysql 表
(1)建立django
(2)建立app檔案python mange.py startapp cmdb
(3)建立資料庫，在project同名的配置的 init.py檔案中配置mysql連線
import pymysql
pymysql.install_as_MySQLdb()
(4)在setting.py 中配置mysql 連線，找到DATABASES
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.mysql',
'NAME': 'testuser', 'USER':'root', 'PASSWORD':'root', 'HOST':'localhost', 'PORT': '3306', } } (5)在setting檔案下配置INSTALLED_APPS加入cmdb模組
INSTALLED_APPS = [
'django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages', 'django.contrib.staticfiles', 'cmdb', ] (6)根據CODEFIRST建立表，在app models.py 建立類
from django.db import models
# Create your models here.
class user_info(models.Model): username = models.CharField(max_length=32) password = models.CharField(max_length=64) (7)建立新的遷移策略檔案python manage.py makemigrations
(8)生成資料庫表python manage.py migrate
三、url 配置
(1)在project 檔案的url配置，url分發,分發到指定的app
from django.conf.urls import url,include
from django.contrib import admin
urlpatterns = [
url(r'^admin/', admin.site.urls), url(r'cmdb/', include('cmdb.urls')) ] (2)在指定的app檔案下建立urls.py檔案
from django.conf.urls import url,include
from cmdb import views
urlpatterns = [
#登陸url url(r'login', views.login), #主介面展示url url(r'index', views.index), #展示所使用者資訊url url(r'user_info', views.user_info), #展示個人資訊的url url(r'user-(?P<nid>\d+)',views.user_per), #刪除個人資訊的url url(r'delete-(?P<nid>\d+)',views.user_delete), ] 四、views 層邏輯編寫
(1)登陸主要用到了models.user_info.objects.filter(username=u, password=p).first()
def login(request):
if request.method == 'GET': return render(request,'login.html',{'msg':''}) elif request.method == 'POST': u = request.POST.get('user',None) p = request.POST.get('pwd',None) if u and p : #select * from cmdb_user_info where username=u password=p obj = models.user_info.objects.filter(username=u, password=p).first() if obj: #重定向到cmdb/index url 上，url分發到index方法上 return redirect('/cmdb/index') else: msg = '使用者名稱密碼錯誤' return render(request,'login.html',{'msg':msg}) else: return render(request, 'login.html', {'msg': ''}) (2)主頁面展示
def index(request):
return render(request,'index_u.html') (3)使用者資訊的增加/展示
主要用到了
#select * from cmdb_user_info
obj = models.user_info.objects.all()
#inster into cmdb_user_info(username,password) values(u,p)
models.user_info.objects.create(username=u,password=p)
def user_info(request):
if request.method == 'GET': #select * from cmdb_user_info obj = models.user_info.objects.all() return render(request,'index.html',{'user':obj}) elif request.method == 'POST': u = request.POST.get('user') p = request.POST.get('pwd') #inster into cmdb_user_info(username,password) values(u,p) models.user_info.objects.create(username=u,password=p) return redirect('/cmdb/user_info') (4)刪除
主要用到
#刪除 delete from 表 where id=2
obj = models.user_info.objects.filter(id=nid).delete()
def user_delete(request, nid):
#刪除 delete from 表 where id=2 obj = models.user_info.objects.filter(id=nid).delete() return redirect('/cmdb/user_info') 四、templates
(1)login頁面
<!DOCTYPE html>
<html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> </head> <body> <form action="{{ request.path_info }}" method="post"> <input type="text" name="user"> <input type="password" name="pwd"> <span>{{ msg }}</span> <input type="submit"> </form> </body> </html> (2)index 頁面
<!DOCTYPE html>
<html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> <style> body{ margin: 0; } .header{ height: 48px; background-color: aquamarine; color: white; } .conleft{ position: absolute; top: 48px; width: 200px; left: 0; bottom: 0; background-color:chocolate; } .conright{ position: absolute; left: 200px; bottom: 0px; right: 0px; top: 48px; overflow: auto; background-color: burlywood; } </style> </head> <body> <div class="header">歡迎</div> <div class="con"> <div class="conleft"> <a href="/cmdb/user_info">使用者管理</a> </div> <div class="conright"> </div> </div> <div></div> </body> </html> (3)使用者資訊展示頁面
<!DOCTYPE html>
<html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> <style> body{ margin: 0; } .header{ height: 48px; background-color: aquamarine; color: white; } .conleft{ position: absolute; top: 48px; width: 200px; left: 0; bottom: 0; background-color:chocolate; } .conright{ position: absolute; left: 200px; bottom: 0px; right: 0px; top: 48px; overflow: auto; background-color: burlywood; } </style> </head> <body> <div class="header">歡迎</div> <div class="con"> <div class="conleft"> <a href="/cmdb/user_info">使用者管理</a> </div> <div class="conright"> <form action="{{ request.path_info}}" method="post"> <input type="text" name="user"> <input type="text" name="pwd"> <input type="submit" > </form> {% for i in user %} <a href="/cmdb/user-{{ i.id }}">{{ i.username }} <a href="/cmdb/delete-{{ i.id }}">刪除</a> <br> {% endfor %} </div> </div> <div></div> </body> </html> (4)個人資訊更改頁面
<!DOCTYPE html>
<html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> <style> body{ margin: 0; } .header{ height: 48px; background-color: aquamarine; color: white; } .conleft{ position: absolute; top: 48px; width: 200px; left: 0; bottom: 0; background-color:chocolate; } .conright{ position: absolute; left: 200px; bottom: 0px; right: 0px; top: 48px; overflow: auto; background-color: burlywood; } </style> </head> <body> <div class="header">歡迎</div> <div class="con"> <div class="conleft"> <a href="/cmdb/user_info">使用者管理</a> </div> <div class="conright"> <p>使用者資訊</p> <form action="{{ request.path_info }}" method="post"> <input type="text" value="{{ i.username }}" name="user">- <input type="text" value="{{ i.password }}" name="pwd"> <input type="submit">編輯</a> </form> </div> </div> <div></div> </body> </html> 作者：兩點半的雜貨鋪
連結：https://www.jianshu.com/p/bd0af02e59ba
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