介绍了怎么初始化一个django-admin项目，并且里面默认初始化了后台用户模块
怎么在django-admin中添加其他业务模块？基于上一篇的项目，继续
初始化一个模块：博客
$ python3 manage.py startapp blog
app配置中添加 blog
打开/mydjango/mydjango/settings.py
INSTALLED_APPS = [ 'django.contrib.admin', 'django.contrib.auth', 'django.contrib.contenttypes', 'django.contrib.sessions', 'django.contrib.messages', 'django.contrib.staticfiles', 'blog', #新添加]
blog模块中，新加类型article、comment
打开 /mydjango/blog/models.py,添加内容：
from django.db import models# Create your models here.class Article(models.Model): # 无需写id，pymysql会自动生成自增长主键id title = models.CharField(max_length=100, verbose_name='文章标题') content = models.TextField(verbose_name='文章内容') author = models.CharField(max_length=30, verbose_name='作者') time = models.DateTimeField(auto_now=True, verbose_name='时间')class Comment(models.Model): articleid = models.IntegerField(verbose_name='文章id') user = models.CharField(max_length=30, verbose_name='ls评论人') content = models.CharField(max_length=100, verbose_name='评论内容') time = models.DateTimeField(auto_now=True, verbose_name='时间')
更新变化到mysql
$ python3 manage.py migrate.报错...No migrations to apply. Your models have changes that are not yet reflected in a migration, and so won't be applied. Run 'manage.py makemigrations' to make new migrations, and then re-run 'manage.py migrate' to apply them.
这里提示先执行manage.py makemigrations，然后执行manage.py migrate
$ python3 manage.py makemigrations Migrations for 'blog': blog/migrations/0001_initial.py - Create model Article - Create model Comment
$ python3 manage.py migrate Operations to perform: Apply all migrations: admin, auth, blog, contenttypes, sessionsRunning migrations: Applying blog.0001_initial... OK
执行成功，查看数据库 
表名是以 模块_类型 定义的
添加路由配置
打开/mydjango/mydjango/urls.py，默认已存在下面配置，如果没有，则添加：
from django.contrib import adminfrom django.urls import pathurlpatterns = [ path('admin/', admin.site.urls),] 添加模块注册配置
打开/mydjango/blog/admin.py，添加配置：
from django.contrib import adminfrom .models import Article, Comment# 文章模块class ArticleAdmin(admin.ModelAdmin): list_display = ['id', 'title', 'content', 'author', 'time'] # 搜索字段 search_fields = ('title', 'author',)# 评论模块class CommentAdmin(admin.ModelAdmin): list_display = ['id', 'articleid', 'user', 'content', 'time'] #搜索字段 search_fields = ('user', 'content',)# 注册模块url到后台admin.site.register(Article, ArticleAdmin)admin.site.register(Comment, CommentAdmin)# 设置页面显示信息admin.AdminSite.site_header = 'admin管理系统'admin.AdminSite.site_title = 'django管理后台' 访问后台页面
浏览器访问 ，多了BLOG的管理模块 
添加数据
搜索数据，article可使用标题和作者搜索（因为上面的admin.py配置的）
# 文章模块class ArticleAdmin(admin.ModelAdmin): list_display = ['id', 'title', 'content', 'author', 'time'] # 搜索字段 search_fields = ('title', 'author',) 使用标题搜索
使用作者搜索
评论模块相似。