Xadmin组件

    ‘Xadmin.apps.XadminConfig‘,
    ‘app01.apps.App01Config‘,
    ‘app02.apps.App02Config‘,

#Xadmin/service/apps.py
from django.apps import AppConfig
from django.utils.module_loading import autodiscover_modules

class XadminConfig(AppConfig):
    name = ‘Xadmin‘

    def ready(self):   #当加载这个类的时候，这个方法自动执行
        autodiscover_modules(‘Xadmin‘)  #通过此步设置，Django一启动就是扫描每一个叫Xadmin.py的文件

from django.conf.urls import url
from django.shortcuts import HttpResponse,render,redirect

#定义默认的样式类
class ModelXadmin(object):
    def __init__(self,model,site):

        self.model=model
        self.site=site      #site为单例对象

    def list_view(self, request):
        print("self.model",self.model)  #用户访问的是哪张表，self.model就是哪张表，这就是urls跨类定义最大的意义所在
        #这里首先要弄清楚self是什么，我们一层一层的找，self->list_view->get_urls2->urls2->admin_class_obj,
        #所以这里self.model就相当于admin_class_obj.mode,如果我们对Book进行注册的话会在site,_registry生成一个键值
        #{Book：ModelXadmin(Book,site)},所以admin_class_obj=ModelXadmin(Book,site)，而ModelXadmin(Book,site).Book=Book

        data_list=self.model.objects.all()
        print("data_list",data_list)
        return render(request, ‘list_view.html‘,{"data_list":data_list})

    def add_view(self, request):
        return render(request, ‘add_view.html‘)

    def change_view(self, request, id):
        return render(request, ‘change_view.html‘)

    def delete_view(self, request, id):
        return render(request, ‘delete_view.html‘)

    def get_urls2(self):
        temp = []
        temp.append(url(r"^$", self.list_view))
        temp.append(url(r"^add/$", self.add_view))
        temp.append(url(r"^(\d+)/change/$", self.change_view))
        temp.append(url(r"^(\d+)/delete/$", self.delete_view))
        return temp

    @property
    def urls2(self): #urls2跨类定义
        return self.get_urls2(), None, None

# 定义一个类，用对创建单例对象
class XadminSite(object):
    def __init__(self, name=‘admin‘):  #self为单例对象site
        self._registry = {}

    def get_urls(self):
        print(self._registry)  # {Book:ModelAdmin(Book),.......}

        temp = []
        for model, admin_class_obj in self._registry.items():
            # admin_class_obj是上面ModelXadmin类的实例化对象，把urls定义在ModelXadmin类中
            app_name = model._meta.app_label
            model_name = model._meta.model_name

            temp.append(url(r‘^{0}/{1}/‘.format(app_name, model_name), admin_class_obj.urls2), )

            ‘‘‘
            url(r"app01/book",ModelXadmin(Book,site).urls2)
            url(r"app01/publish",ModelXadmin(Publish,site).urls2)
            url(r"app02/order",ModelXadmin(Order,site).urls2)
            
            ‘‘‘
        return temp

    @property
    def urls(self):
        return self.get_urls(),None,None

    def register(self, model, admin_class=None, **options):
        if not admin_class:
                 admin_class = ModelXadmin  #使用默认的样式
        self._registry[model] = admin_class(model, self) # {Book:ModelAdmin(Book),Publish:ModelAdmin(Publish)}

site=XadminSite()   #创建单例对象

print("app01 Xadmin")
from Xadmin.service.Xadmin import site,ModelXadmin
from app01.models import *  #导入所有表进行注册

#定义我们自己的样式
class BookConfig(ModelXadmin):
    list_display=["title","prcie"]

site.register(Book,BookConfig)  #注册book表

class BookConfig(ModelXadmin):
    list_display=["name"]

site.register(Publish,BookConfig)  
site.register(Author)       
site.register(AuthorDetail) 

print("app02 Xadmin")
from Xadmin.service.Xadmin import site
from app02.models import *

site.register(Order)
site.register(Food)

print("_registry",site._registry)  #6个表