实现目标:
开发首页显示BBS的标题和摘要,点击BBS的标题可跳转到BBS详细页面进行展示。
开发环境及开发工具:
Python 3.6.3
Django 2.0
Pycharm 2017.3
实现过程:
1创建project
用语句创建:
django-admin startproject BBS_Pro
2、创建app
python manage.py startapp app01
3、启动服务
python manage.py runserver
4、编辑BBS_Pro/settings
把新创建的app名称加入,进行admin汉化:
INSTALLED_APPS = [ 'django.contrib.admin', 'django.contrib.auth', 'django.contrib.contenttypes', 'django.contrib.sessions', 'django.contrib.messages', 'django.contrib.staticfiles', 'app01', ]
LANGUAGE_CODE = 'zh-hans' #修改
5、定义数据模型
编辑mblog/models.py
from django.db import models from django.contrib.auth.models import User #导入django自带的用户 class BBS(models.Model): #BBS title = models.CharField(max_length=50) #标题 summary = models.CharField(max_length=200,blank=True,null=True) #摘要。可以为空,blank是admin中可为空,null是表里可为空 content = models.TextField() #内容 author = models.ForeignKey( 'BBS_user',on_delete=models.CASCADE,) #作者,外键到BBS_user中,用到还未定义的表要用引号 view_count = models.IntegerField() #浏览次数 ranking = models.IntegerField() #排名 created_at = models.DateTimeField() #创建时间 update_at = models.DateTimeField() #更新时间 def __str__(self): return self.title class Category(models.Model): #板块 name = models.CharField(max_length=30,unique=True) #板块名称,unique是不能重复 administrator = models.ForeignKey('BBS_user',on_delete=models.CASCADE,) #版主 def __str__(self): return self.name class BBS_user(models.Model): #用户表。继承django自带的用户认证系统 user = models.OneToOneField(User,on_delete=models.CASCADE,) #用户 signature = models.CharField(max_length=100,default='这家伙没有签名') #签名 photo = models.ImageField(upload_to="upload_imgs/", default="upload_imgs/user_1.jpg") #头像默认一个图片,upload_to会自动在根目录创建一个文件夹,支持上传 def __str__(self): return self.user.username
6、生成数据表
python manage.py makemigrations app01
python manage.py migrate
7、生成admin的超级管理员
python manage.py createsuperuser
8、修改mblog/admin.py内容
from django.contrib import admin from app01 import models class BBS_admin(admin.ModelAdmin): list_display = ('title','summary','author','view_count','ranking','created_at','update_at') #上面一行作用是在admin中显示需要显示的字段 list_filter = ('created_at',) #是一个元组,末尾要加逗号 search_fields = ('title','summary','author__user__username') #在admin中创建搜索,如果是外键的字段则用'auther__user__username'形式,此处要主要。 admin.site.register(models.BBS,BBS_admin) admin.site.register(models.Category) admin.site.register(models.BBS_user)
登录admin 127.0.0.1:8000/admin
9、创建模板和静态文件的文件夹
创建文件夹BBS_Pro/app01/templates/app01 这里放app01的所有模板;创建文件夹BBS_Pro/statics 这里放所有用到的静态文件。
Settings中增加内容:
STATICFILES_DIRS = [ os.path.join(BASE_DIR, "statics"), ]
Settings中修改TEMPLATES 的DIRS内容
'DIRS': [os.path.join(BASE_DIR, 'templates')],
10、创建文件app01/urls.py
from django.urls import path,include from app01 import views urlpatterns = [ path('',views.index,name='index'), ]
11、修改BBS_Pro/urls.py
from django.contrib import admin from django.urls import path,include urlpatterns = [ path('admin/', admin.site.urls), path('bbs/',include('app01.urls')), ]
12、修改app01/views.py内容
from django.shortcuts import render from .models import BBS def index(request): bbs_lists =BBS.objects.all() return render(request,'app01/index.html',{'bbs_lists':bbs_lists})
13、创建共享模版BBS_Pro/templates/base.html
Base.html可用bootstrap里面的模板修改,在需要的区域进行如下标记,便于其他模板补充
{% block page_content %}
{% endblock %}
具体页面代码如下:
<!DOCTYPE html> <html lang="zh-CN"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="width=device-width, initial-scale=1"> <!-- 上述3个meta标签*必须*放在最前面,任何其他内容都*必须*跟随其后! --> <meta name="description" content=""> <meta name="author" content=""> <link rel="icon" href="/static/image/favicon.ico"> <title>页面头名称</title> <!-- Bootstrap core CSS --> <link href="/static/css/bootstrap.min.css" rel="stylesheet"> <!-- Custom styles for this template --> <link href="navbar.css" rel="stylesheet"> </head> <body> <div class="container"> <!-- Static navbar --> <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="#navbar" aria-expanded="false" aria-controls="navbar"> <span class="sr-only">Toggle navigation</span> <span class="icon-bar"></span> <span class="icon-bar"></span> <span class="icon-bar"></span> </button> <a class="navbar-brand" href="#">项目测试名称</a> </div> <div id="navbar" class="navbar-collapse collapse"> <ul class="nav navbar-nav"> <li class="active"><a href="#">全部</a></li> </ul> <ul class="nav navbar-nav navbar-right"> <li class="dropdown"> <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">列表 <span class="caret"></span></a> <ul class="dropdown-menu"> <li><a href="#">Action</a></li> <li><a href="#">Another action</a></li> <li><a href="#">Something else here</a></li> <li role="separator" class="divider"></li> <li class="dropdown-header">Nav header</li> <li><a href="#">Separated link</a></li> <li><a href="#">One more separated link</a></li> </ul> </li> </ul> </div><!--/.nav-collapse --> </div><!--/.container-fluid --> </nav> <!-- Main component for a primary marketing message or call to action --> <div class="jumbotron"> {% block page_content %} {% endblock %} </div> </div> <!-- /container --> <!-- Bootstrap core JavaScript ================================================== --> <!-- Placed at the end of the document so the pages load faster --> <script src="/static/js/jquery.min.js"></script> <script>window.jQuery || document.write('<script src="../../assets/js/vendor/jquery.min.js"></script>')</script> <script src="/static/js/bootstrap.min.js"></script> </body> </html>
14、新增模板index.html
app01/templates/app01/index.html
{% extends 'base.html' %} {% block page_content %} {% for bbs_list in bbs_lists %} <h4><a href="#">{{ bbs_list.title }}</a></h4> <h5>{{ bbs_list.summary}}</h5> <hr> {% endfor %} {% endblock %}
15、修改views.py
定义index
from django.shortcuts import render from .models import BBS def index(request): bbs_lists =BBS.objects.all() return render(request,'app01/index.html',{'bbs_lists':bbs_lists})
16、查看效果 127.0.0.1/bbs
通过127.0.0.1/admin手工添加一些后台数据。
17、做bbs的详细页面
修改app01/urls.py内容,增加url:
path('<int:bbs_id>/',views.bbs_detail,name='bbs_detail'),
18、修改views.py
定义bbs_detail
def bbs_detail(request,bbs_id): #传的参数给url用 bbss =BBS.objects.get(id=bbs_id) return render(request,'app01/detail.html',{'bbs_obj':bbss}) #字典给模板用
19、新建模板detail.html
app01/templates/app01/detail.html
{% extends 'base.html' %} {% block page_content %} <h4>{{ bbs_obj.title }}</h4> <h5>{{ bbs_obj.summary}}</h5> <h5>{{ bbs_obj.content}}</h5> <h5>{{ bbs_obj.author}}</h5> <h5>{{ bbs_obj.view_count}}</h5> <h5>{{ bbs_obj.ranking}}</h5> <h5>{{ bbs_obj.created_at}}</h5> <h5>{{ bbs_obj.update_at}}</h5> <hr> {% endblock %}
20、修改index.html中的链接
{% extends 'base.html' %} {% block page_content %} {% for bbs_list in bbs_lists %} <h4><a href="/bbs/{{bbs_list.id}}">{{ bbs_list.title }}</a></h4> <h5>{{ bbs_list.summary}}</h5> <hr> {% endfor %} {% endblock %}
首页中点击bbs标题可链接进入bbs的详细内容页面。