setting.py中：
1 """
2 Django settings for untitled3 project.
3
4 Generated by ‘django-admin startproject‘ using Django 2.0.7.
5
6 For more information on this file, see
7 https://docs.djangoproject.com/en/2.0/topics/settings/
8
9 For the full list of settings and their values, see
10 https://docs.djangoproject.com/en/2.0/ref/settings/
11 """
12
13 import os
14
15 # Build paths inside the project like this: os.path.join(BASE_DIR, ...)
16 BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
17
18
19 # Quick-start development settings - unsuitable for production
20 # See https://docs.djangoproject.com/en/2.0/howto/deployment/checklist/
21
22 # SECURITY WARNING: keep the secret key used in production secret!
23 SECRET_KEY = ‘3p4)ob=u_tpk_ha+5fs1x8vfn+(s5-92$(05%r04ny9v+dv=qp‘
24
25 # SECURITY WARNING: don‘t run with debug turned on in production!
26 DEBUG = True
27
28 ALLOWED_HOSTS = []
29
30
31 # Application definition
32
33 INSTALLED_APPS = [
34 ‘django.contrib.admin‘,
35 ‘django.contrib.auth‘,
36 ‘django.contrib.contenttypes‘,
37 ‘django.contrib.sessions‘,
38 ‘django.contrib.messages‘,
39 ‘django.contrib.staticfiles‘,
40 ‘app01‘,
41 ]
42
43 MIDDLEWARE = [
44 ‘django.middleware.security.SecurityMiddleware‘,
45 ‘django.contrib.sessions.middleware.SessionMiddleware‘,
46 ‘django.middleware.common.CommonMiddleware‘,
47 #‘django.middleware.csrf.CsrfViewMiddleware‘,
48 ‘django.contrib.auth.middleware.AuthenticationMiddleware‘,
49 ‘django.contrib.messages.middleware.MessageMiddleware‘,
50 ‘django.middleware.clickjacking.XFrameOptionsMiddleware‘,
51 ]
52
53 ROOT_URLCONF = ‘untitled3.urls‘
54
55 TEMPLATES = [
56 {
57 ‘BACKEND‘: ‘django.template.backends.django.DjangoTemplates‘,
58 ‘DIRS‘: [os.path.join(BASE_DIR, ‘templates‘)]
59 ,
60 ‘APP_DIRS‘: True,
61 ‘OPTIONS‘: {
62 ‘context_processors‘: [
63 ‘django.template.context_processors.debug‘,
64 ‘django.template.context_processors.request‘,
65 ‘django.contrib.auth.context_processors.auth‘,
66 ‘django.contrib.messages.context_processors.messages‘,
67 ],
68 },
69 },
70 ]
71
72 WSGI_APPLICATION = ‘untitled3.wsgi.application‘
73
74
75 # Database
76 # https://docs.djangoproject.com/en/2.0/ref/settings/#databases
77
78 DATABASES = {
79 ‘default‘: {
80 ‘ENGINE‘: ‘django.db.backends.sqlite3‘,
81 ‘NAME‘: os.path.join(BASE_DIR, ‘db.sqlite3‘),
82 }
83 }
84
85
86 # Password validation
87 # https://docs.djangoproject.com/en/2.0/ref/settings/#auth-password-validators
88
89 AUTH_PASSWORD_VALIDATORS = [
90 {
91 ‘NAME‘: ‘django.contrib.auth.password_validation.UserAttributeSimilarityValidator‘,
92 },
93 {
94 ‘NAME‘: ‘django.contrib.auth.password_validation.MinimumLengthValidator‘,
95 },
96 {
97 ‘NAME‘: ‘django.contrib.auth.password_validation.CommonPasswordValidator‘,
98 },
99 {
100 ‘NAME‘: ‘django.contrib.auth.password_validation.NumericPasswordValidator‘,
101 },
102 ]
103
104
105 # Internationalization
106 # https://docs.djangoproject.com/en/2.0/topics/i18n/
107
108 LANGUAGE_CODE = ‘en-us‘
109
110 TIME_ZONE = ‘UTC‘
111
112 USE_I18N = True
113
114 USE_L10N = True
115
116 USE_TZ = True
117
118
119 # Static files (CSS, JavaScript, Images)
120 # https://docs.djangoproject.com/en/2.0/howto/static-files/
121
122 STATIC_URL = ‘/static/‘
models.py中（数据库创建表结构都在这里）：
1 from django.db import models 2 3 # Create your models here. 4 class Business(models.Model): 5 caption = models.CharField(max_length=32) 6 code = models.CharField(max_length=32,null=True,default=‘SA‘)#default是设置默认值，null=True是数据库中允许这个字段为空 7 8 class Host(models.Model): 9 nid = models.AutoField(primary_key=True) #设置主键并自增 10 11 hostname = models.CharField(max_length=32,db_index=True)#max_length设置字段最大长度 12 13 ip = models.GenericIPAddressField(protocol=‘ipv4‘,db_index=True)#db_index=True设置为索引 14 15 port = models.IntegerField() 16 17 b = models.ForeignKey(to="Business", to_field=‘id‘,on_delete=models.CASCADE)#报错加上了on_delete=models.CASCADE1 18 #设置外键关联Business中的id字段也可写成b = models.ForeignKey(‘Business‘,to_field=‘id‘)
urls.py中（路由都在这里）：
1 """untitled3 URL Configuration 2 3 The `urlpatterns` list routes URLs to views. For more information please see: 4 https://docs.djangoproject.com/en/2.0/topics/http/urls/ 5 Examples: 6 Function views 7 1. Add an import: from my_app import views 8 2. Add a URL to urlpatterns: path(‘‘, views.home, name=‘home‘) 9 Class-based views 10 1. Add an import: from other_app.views import Home 11 2. Add a URL to urlpatterns: path(‘‘, Home.as_view(), name=‘home‘) 12 Including another URLconf 13 1. Import the include() function: from django.urls import include, path 14 2. Add a URL to urlpatterns: path(‘blog/‘, include(‘blog.urls‘)) 15 """ 16 from django.contrib import admin 17 from django.urls import path 18 from app01 import views 19 from django.conf.urls import url 20 21 urlpatterns = [ 22 path(‘admin/‘, admin.site.urls), 23 url(r‘^business/$‘,views.business),#$是结束符 24 ]
views.py中(主要业务逻辑都在这里)：
1 from django.shortcuts import render
2 from app01 import models
3 # Create your views here.
4 def business(request):
5
6
7 v1 = models.Business.objects.all()
8
9 #QuerySet
10 #[obj(id,caption,code),obj(id,caption,code),obj(id,caption,code)] 里面的小元素是对象
11
12 v2 = models.Business.objects.values(‘id‘, ‘caption‘) # 拿固定列
13 # QuerySet
14 # [{‘id‘:1,‘caption‘:‘xx‘,‘code‘:‘da‘},{....},{.....}] 里面的小元素是字典
15
16 v3 = models.Business.objects.values_list(‘id‘, ‘code‘)
17 # QuerySet
18 # [(1,开发),(2,运维)] 里面的小元素是字典
19
20 return render(request,‘business.html‘,{‘v1‘:v1,‘v2‘:v2,‘v3‘:v3}) #注意：一定要加return 第一个参数request是对象不是字符串！不是字符串！不是字符串！
templates下的XXXX.html中（网页模板都放templates下）：
1 <!DOCTYPE html>
2 <html lang="en">
3 <head>
4 <meta charset="UTF-8">
5 <title>Title</title>
6 </head>
7 <body>
8
9 <h1> 对象 </h1>
10 <ul>
11 {% for row in v1 %}
12
13 <li> {{ row.caption }}-{{ row.code }} </li>
14
15 {% endfor %}
16 </ul>
17
18 <h1> 字典 </h1>
19
20 <ul>
21 {% for row in v2 %}
22
23 <li> {{ row.id }}-{{ row.caption }} </li>
24
25 {% endfor %}
26 </ul>
27
28
29 <h1> 元组 </h1>
30
31 <ul>
32 {% for row in v3 %}
33
34 <li> {{ row.0}}-{{ row.1 }} </li>
35
36 {% endfor %}
37 </ul>
38
39 </body>
40 </html>
原文地址：https://www.cnblogs.com/topzhao/p/9307922.html
时间： 2024-10-13 07:32:18