Django 测试平台开发（三）开发博客②
1、上下文管理器
上下文管理器
django提取context中的数据去供模板调用
需求: 所有的页面都需要一个特定的变量
本质: python函数 , 接收一个HttpRequest对象的参数 , 且返回的必须是一个字典
定义上下文管理器
文件名命名不受限, 放置的路径也不受拘束, 可以放在django项目下的任意位置
1、在user文件夹下创建文件process_content.py
1 from . import models
2
3 def category_process(request):
4 print(‘category_process......‘)
5 categories = models.Category.objects.filter(is_delete=False)
6 return {‘nav‘:categories}
2、配置setting.py文件
1 TEMPLATES = [
2 {
3 ‘BACKEND‘: ‘django.template.backends.django.DjangoTemplates‘,
4 ‘DIRS‘: [os.path.join(BASE_DIR,‘templates‘)],
5 # os.path.join(BASE_DIR,‘templates‘)没了这句，
6 # 会显示django.template.exception.TemplateDoesNotExist: index.html
7 ‘APP_DIRS‘: True,
8 ‘OPTIONS‘: {
9 ‘context_processors‘: [
10 ‘django.template.context_processors.debug‘,
11 ‘django.template.context_processors.request‘,
12 ‘django.contrib.auth.context_processors.auth‘,
13 ‘django.contrib.messages.context_processors.messages‘,
14 ‘user.process_content.category_process‘
15 ],
16 },
17 },
18 ]
1 """
2 Django settings for dj_test project.
3
4 Generated by ‘django-admin startproject‘ using Django 2.1.5.
5
6 For more information on this file, see
7 https://docs.djangoproject.com/en/2.1/topics/settings/
8
9 For the full list of settings and their values, see
10 https://docs.djangoproject.com/en/2.1/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/2.1/howto/deployment/checklist/
21
22 # SECURITY WARNING: keep the secret key used in production secret!
23 SECRET_KEY = ‘[email protected]#lad3s*!_iwc68#9!_18f1x-!sygom9a#%ma!!kob+wh‘
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 ‘user.apps.UserConfig‘,
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 = ‘dj_test.urls‘
54
55 TEMPLATES = [
56 {
57 ‘BACKEND‘: ‘django.template.backends.django.DjangoTemplates‘,
58 ‘DIRS‘: [os.path.join(BASE_DIR,‘templates‘)],
59 # os.path.join(BASE_DIR,‘templates‘)没了这句，
60 # 会显示django.template.exception.TemplateDoesNotExist: index.html
61 ‘APP_DIRS‘: True,
62 ‘OPTIONS‘: {
63 ‘context_processors‘: [
64 ‘django.template.context_processors.debug‘,
65 ‘django.template.context_processors.request‘,
66 ‘django.contrib.auth.context_processors.auth‘,
67 ‘django.contrib.messages.context_processors.messages‘,
68 ‘user.process_content.category_process‘
69 ],
70 },
71 },
72 ]
73
74 WSGI_APPLICATION = ‘dj_test.wsgi.application‘
75
76
77 # Database
78 # https://docs.djangoproject.com/en/2.1/ref/settings/#databases
79
80 DATABASES = {
81 ‘default‘: {
82 ‘ENGINE‘: ‘django.db.backends.sqlite3‘,
83 ‘NAME‘: os.path.join(BASE_DIR, ‘db.sqlite3‘),
84 }
85 # ‘default‘: {
86 # ‘ENGINE‘: ‘django.db.backends.mysql‘,
87 # ‘NAME‘: ‘db1‘,
88 # ‘USER‘: ‘db1‘,
89 # ‘PASSWORD‘: ‘db1‘,
90 # ‘HOST‘: ‘db1‘,
91 # ‘PORT‘: ‘db1‘,
92 # }
93 }
94
95
96 # Password validation
97 # https://docs.djangoproject.com/en/2.1/ref/settings/#auth-password-validators
98
99 AUTH_PASSWORD_VALIDATORS = [
100 {
101 ‘NAME‘: ‘django.contrib.auth.password_validation.UserAttributeSimilarityValidator‘,
102 },
103 {
104 ‘NAME‘: ‘django.contrib.auth.password_validation.MinimumLengthValidator‘,
105 },
106 {
107 ‘NAME‘: ‘django.contrib.auth.password_validation.CommonPasswordValidator‘,
108 },
109 {
110 ‘NAME‘: ‘django.contrib.auth.password_validation.NumericPasswordValidator‘,
111 },
112 ]
113
114
115 # Internationalization
116 # https://docs.djangoproject.com/en/2.1/topics/i18n/
117
118 LANGUAGE_CODE = ‘zh-Hans‘
119
120 TIME_ZONE = ‘Asia/Shanghai‘
121
122 USE_I18N = True
123
124 USE_L10N = True
125
126 USE_TZ = False
127
128
129 # Static files (CSS, JavaScript, Images)
130 # https://docs.djangoproject.com/en/2.1/howto/static-files/
131
132 STATIC_URL = ‘/static/‘
133
134 TEMPLATE_DIRS = (os.path.join(BASE_DIR, ‘templates‘),)
135
136 STATICFILES_DIRS = (
137 os.path.join(BASE_DIR,‘static‘),
138 ) # 用静态文件配置
139
140 # 多媒体路径path
141 MEDIA_ROOT = os.path.join(BASE_DIR,‘static‘) # 上传文件的路径
3、在views.py文件下，把HttpRequest返回的特定变量删除
1 import datetime
2 from django.shortcuts import render,HttpResponse
3 from .models import Category,Article
4 # Create your views here.
5
6 def index(request):
7 print(‘views...index‘)
8 article = Article.objects.filter(is_delete=False)
9
10 data = {‘articles‘:article}
11 return render(request,‘index.html‘,data)
12
13 def category(request,id):
14 print(‘views...index‘)
15 article = Article.objects.filter(is_delete=False,category_id=id)
16
17 data = {‘articles‘:article}
18 return render(request,‘index.html‘,data)
4、再次用浏览器打开index.html页面
2、多对多关联
3、分页
原文地址：https://www.cnblogs.com/zibinchen/p/12219422.html
时间： 2024-08-26 12:34:57