Django测试平台开发开发博客②

Posted 2021-03-14 zibinchen

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 = ‘!nyr_@#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

View Code

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

 

 

 

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