【Django】教程-4-一个增删改查的Demo
【Django】教程-1-安装+创建项目+目录结构介绍
【Django】教程-2-前端-目录结构介绍
【Django】教程-3-数据库相关介绍
9. demo
一个包含前后端的，增删查demo
9.1 前端代码
layout.html 定义父级，需要被其他前端页面继承的html模板, JQ跟bootstrap 使用cdn的就可以！我的为本地的
{% load static %}
DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>{% block title %}{% endblock %}title>
<link rel="stylesheet" href="{% static 'plugins/bootstrap-3.4.1/css/bootstrap.css' %}"/>
<style>
.navbar {
border-radius: 0;
}
style>
head>
<body>
<nav class="navbar navbar-default">
<div class="container-fluid">
<div class="navbar-header">
<button type="button" class="navbar-toggle collapsed" data-toggle="collapse"
data-target="#bs-example-navbar-collapse-1" aria-expanded="false">
<span class="sr-only">Toggle navigationspan>
<span class="icon-bar">span>
<span class="icon-bar">span>
<span class="icon-bar">span>
button>
<a class="navbar-brand" href="#">系统a>
div>
<div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
<ul class="nav navbar-nav">
<li><a href="/user/list">用户管理a>li>
<li><a href="/department/list">部门管理a>li>
ul>
<form class="navbar-form navbar-left">
<div class="form-group">
<input type="text" class="form-control" placeholder="查询">
div>
<button type="submit" class="btn btn-default">查询button>
form>
<ul class="nav navbar-nav navbar-right">
<li><a href="#">Linka>li>
<li class="dropdown">
<a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true"
aria-expanded="false">Dropdown <span class="caret">span>a>
<ul class="dropdown-menu">
<li><a href="#">Actiona>li>
<li><a href="#">Another actiona>li>
<li><a href="#">Something else herea>li>
<li role="separator" class="divider">li>
<li><a href="#">Separated linka>li>
ul>
li>
ul>
div>
div>
nav>
<div>
{% block content %}{% endblock %}
div>
{#<h1>底部h1>#}
<script src="{ % static 'js/jquery-3.7.1.js %'}">script>
<script src="{ % static 'plugins/bootstrap-3.4.1/js/bootstrap.js %'}">script>
body>
html>
user_list.html
{% extends 'layout.html' %}
{% block content %}
<div>
<div class="container">
<div style="margin-bottom: 10px">
<a class="btn btn-success" href="/user/add">
<span class="glyphicon glyphicon-plus" aria-hidden="true">span>
新建用户a>
div>
<div class="panel panel-default">
<div class="panel-heading"><span class="glyphicon glyphicon-th-list" aria-hidden="true">span>用户列表
div>
<table class="table table-bordered">
<thead>
<tr>
<th>#th>
<th>姓名th>
<th>密码th>
<th>年龄th>
<th>创建时间th>
<th>性别th>
<th>状态th>
<th>操作th>
tr>
thead>
<tbody>
{% for i in user_list %}
<tr>
<td>{{ i.id }}td>
<td>{{ i.name }}td>
<td>{{ i.password }}td>
<td>{{ i.age }}td>
<td>{{ i.create_time|date:"Y-m-d H:i:s" }}td>
<td>{{ i.get_gender_display }}td>
<td>{{ i.get_status_display }}td>
<td>
<a class="btn btn-primary btn-xs" href="/user/update/{{ i.id }}">编辑a>
<a class="btn btn-danger btn-xs" href="/user/del?nid={{ i.id }}">删除a>
td>
tr>
{% endfor %}
tbody>
table>
div>
div>
div>
{% endblock %}
user_add.htnl 此文件为添加页 和 编辑也代码
{% extends 'layout.html' %}
{% block title %}
{% if user %}更新用户{% else %}添加用户{% endif %}
{% endblock %}
{% block content %}
<div>
<div class="container">
<div class="panel panel-default">
<div class="panel-heading">
<h3 class="panel-title">
<span class="glyphicon glyphicon-tag" aria-hidden="true">{% if user %}更新用户{% else %}
添加用户{% endif %}span>
h3>
div>
<div class="panel panel-body">
<form method="post">
{% csrf_token %}
<div class="form-group">
<label for="exampleInputEmail1">用户名label>
<input type="text" class="form-control" id="user" name="user" placeholder="用户名">
div>
<div class="form-group">
<label for="exampleInputPassword1">密码label>
<input type="password" class="form-control" id="password" name="password"
placeholder="密码">
div>
<div class="form-group">
<label for="exampleInputPassword1">年龄label>
<input type="password" class="form-control" id="age" name="age" placeholder="年龄"
>
div>
<button type="submit" class="btn btn-primary">保存button>
form>
div>
div>
div>
div>
{% endblock %}
9.2 app应用层代码
models.py 数据层
from django.utils import timezone
from django.db import models
# 数据库，表对应关系
class Department(models.Model):
"""部门表"""
title = models.CharField(verbose_name="标题", max_length=32)
class UserInfo(models.Model):
'''用户表'''
name = models.CharField(max_length=32)
password = models.CharField(max_length=64)
age = models.IntegerField()
create_time = models.DateTimeField(verbose_name="创建时间", default=timezone.now)
depart = models.ForeignKey(to="Department", to_field="id", null=True, blank=True, on_delete=models.SET_NULL)
gender_choices = (
(1, "男"),
(2, "女"),
)
gender = models.SmallIntegerField(verbose_name="性别", choices=gender_choices, default=1)
# 数据状态
status_choices = (
(1, "已删除"),
(0, "可用"),
)
status = models.SmallIntegerField(verbose_name="是否删除", choices=status_choices, default=0)
views.py 业务处理层
from django.shortcuts import render, HttpResponse, redirect
from appTang.models import UserInfo, Department
# 用户列表
def user_list(req):
"""用户展示"""
user_list = UserInfo.objects.all()
return render(req, 'user/user_list.html', {"user_list": user_list})
# 删除用户
def user_delete(req):
"""删除用户"""
id = req.GET.get("nid")
UserInfo.objects.filter(id=id).delete()
return redirect('/user/list')
# 添加+更新用户
def user_add_or_update(req, user_id=None):
if req.method == 'GET':
if user_id:
user = UserInfo.objects.filter(id=user_id).first
else:
user = None
return render(req, 'user/user_add.html', {"user": user})
elif req.method == 'POST':
name = req.POST.get("user")
password = req.POST.get("password")
age = req.POST.get("age")
if user_id:
UserInfo.objects.filter(id=user_id).update(name=name, password=password, age=age)
else:
UserInfo.objects.create(name=name, password=password, age=age)
return redirect('/user/list')
9.3 项目层代码
urls.py
from django.contrib import admin
from django.urls import path
from appTang import views
# 映射关系，视图--->函数
urlpatterns = [
# ----------------用户管理---------------------------
path('user/list', views.user_list),
path('user/del', views.user_delete),
path('user/add', views.user_add_or_update),
path('user/update//' , views.user_add_or_update)
]
settings.py
import os
from pathlib import Path
BASE_DIR = Path(__file__).resolve().parent.parent
SECRET_KEY = 'django-insecure-cyp@mg00%e$k!vpx8a_%n*ap8c5wh285ez$pveb_1918^ty#@s'
DEBUG = True
ALLOWED_HOSTS = []
# Application definition
# 首先注册
INSTALLED_APPS = [
'django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
'appTang',
]
MIDDLEWARE = [
'django.middleware.security.SecurityMiddleware',
'django.contrib.sessions.middleware.SessionMiddleware',
'django.middleware.common.CommonMiddleware',
'django.middleware.csrf.CsrfViewMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.messages.middleware.MessageMiddleware',
'django.middleware.clickjacking.XFrameOptionsMiddleware',
]
ROOT_URLCONF = 'duProject.urls'
TEMPLATES = [
{
'BACKEND': 'django.template.backends.django.DjangoTemplates',
'DIRS': [],
# 'DIRS': [BASE_DIR / 'templates'],
'APP_DIRS': True,
'OPTIONS': {
'context_processors': [
'django.template.context_processors.debug',
'django.template.context_processors.request',
'django.contrib.auth.context_processors.auth',
'django.contrib.messages.context_processors.messages',
],
},
},
]
WSGI_APPLICATION = 'duProject.wsgi.application'
# 数据库
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.mysql',
'NAME': 'app_tang',
'USER': 'duxiaowei',
'PASSWORD': 'duxiaowei135798642',
'HOST': '127.0.0.1',
'PORT': '3306',
}
}
AUTH_PASSWORD_VALIDATORS = [
{
'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
},
{
'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
},
{
'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',
},
{
'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',
},
]
LANGUAGE_CODE = 'en-us'
TIME_ZONE = 'UTC'
USE_I18N = True
USE_TZ = True
STATIC_URL = 'static/'
DEFAULT_AUTO_FIELD = 'django.db.models.BigAutoField'
9.4 整体目录层级
jQ 跟 bootstrap 建议使用cdn 即可，我因网络限制故而下载本地使用
9.5 页面效果图
