from django.db import models

# Create your models here.

class Author(models.Model):

    nid = models.AutoField(primary_key=True)

    name = models.CharField(max_length=32)

    age = models.IntegerField()

    # 与AuthorDetail建立一对一的关系

    authorDetail=models.OneToOneField(to="AuthorDetail", on_delete=models.CASCADE)

    def __str__(self):

        return self.name

class AuthorDetail(models.Model):

    nid = models.AutoField(primary_key=True)

    birthday = models.DateField()

    telephone = models.BigIntegerField()

    addr = models.CharField(max_length=64)

class Publish(models.Model):

    nid = models.AutoField(primary_key=True)

    name = models.CharField(max_length=32)

    city = models.CharField(max_length=32)

    email = models.EmailField()

    def __str__(self):

        return self.name

class Book(models.Model):

    nid = models.AutoField(primary_key=True)

    title = models.CharField(max_length=32)

    publishDate = models.DateField()

    price = models.DecimalField(max_digits=5, decimal_places=2)

    # 与Publish建立一对多的关系,外键字段建立在多的一方

    publish=models.ForeignKey(to="Publish",to_field="nid", on_delete=models.CASCADE)

    # 与Author表建立多对多的关系,ManyToManyField可以建在两个模型中的任意一个，自动创建第三张表

    authors=models.ManyToManyField(to='Author',)

    def __str__(self):

        return self.title

from django.apps import AppConfig

# 经源码分析，admin就是这样先导入这个

from django.utils.module_loading import autodiscover_modules

class StarkConfig(AppConfig):

    name = 'stark'

    def ready(self):

        autodiscover_modules("stark")

from django.conf.urls import url

from django.shortcuts import HttpResponse, render, redirect

class ModelStark(object):

    """

    默认配置类

    """

    list_display = []

    def __init__(self, model):

        self.model = model

    def listview(self, request):

        print(self)  # 当前访问模型表的配置类对象

     print(self.model)  # 当前访问模型表

        data_list = self.model.objects.all()

        print(self.list_display)

        return render(request, "list_view.html", {"data_list": data_list})

    def addview(self, request):

        return HttpResponse("addview")

    def changeview(self, request, id):

        return HttpResponse("changeview")

    def delview(self, request, id):

        return HttpResponse("delview")

    def get_urls(self):

        temp = [

            url(r"^$", self.listview),

            url(r"add/$", self.addview),

            url(r"(\d+)/change/$", self.changeview),

            url(r"(\d+)/delete/$", self.delview),

        ]

        return temp

    @property

    def urls(self):

        return self.get_urls(), None, None

class AdminSite(object):

    """

        stark组件的全局类

    """

    def __init__(self):

        self._registry = {}

    def register(self, model, admin_class=None):

        # 设置配置类

        if not admin_class:

            admin_class = ModelStark

        self._registry[model] = admin_class(model)

    def get_urls(self):

        temp = []

        for model, config_obj in self._registry.items():

            model_name = model._meta.model_name

            app_label = model._meta.app_label

            temp.append(url(r"%s/%s/" % (app_label, model_name), config_obj.urls))

            # config_obj 获取的就是每个for循环中的BookConfig(Book)，publish，author遍历的对象

            '''

                      temp=[

                          #(1) url(r"app01/book/",BookConfig(Book).urls)

                          #(2) url(r"app01/book/",(BookConfig(Book).get_urls(), None, None))

                          #(3) url(r"app01/book/",([

                                                          url(r"^$", BookConfig(Book).listview),

                                                          url(r"add/$", BookConfig(Book).addview),

                                                          url(r"(\d+)/change/$", BookConfig(Book).changeview),

                                                          url(r"(\d+)/delete/$", BookConfig(Book).delview),

                                                   ], None, None))

                          ###########

                          # url(r"app01/publish/",([

                                                          url(r"^$", ModelStark(Publish).listview),

                                                          url(r"add/$",  ModelStark(Publish).addview),

                                                          url(r"(\d+)/change/$",  ModelStark(Publish).changeview),

                                                          url(r"(\d+)/delete/$",  ModelStark(Publish).delview),

                                                   ], None, None))

                      ]

                      '''

        return temp

    @property

    def urls(self):

        return self.get_urls(), None, None

site = AdminSite()