项目启动时自动生成URL

效果图：

 

 

 

知识点：

1. Django启动前通过apps下的ready方法执行一个可以生成URL的py文件
2. include函数主要返回有三个元素的一个元组。第一个是url配置（urlpatterns），第二个是app（app_name），第三个是命名空间（namespace）。
3. 通过单例模式，我们反复操作一个对象。

 

项目名：stark_practice

业务app：web

stark app：stark

一、在业务表中生成数据库

web/models.py

from django.db import modelsclass Department(models.Model):    """    部门表    """    title = models.CharField(verbose_name='部门名称', max_length=32)class UserInfo(models.Model):    """    用户表    """    name = models.CharField(verbose_name='姓名', max_length=32)    age = models.CharField(verbose_name='年龄', max_length=32)    email = models.CharField(verbose_name='邮箱', max_length=32)    department = models.ForeignKey(verbose_name='部门', to='Department', on_delete=models.CASCADE)

 

二、加载django项目时自动执行stark文件

stark.apps.py

from django.apps import AppConfigfrom django.utils.module_loading import autodiscover_modulesclass StarkConfig(AppConfig):    name = 'stark'    def ready(self):         autodiscover_modules('stark')  # 执行名为stark的py文件

 

三、stark组件

stark/service/core_function.py

from django.urls import re_pathclass StarkSite(object):    def __init__(self):        self._registry = []        self.app_name = 'stark'        self.namespace = 'stark'    def register(self, model_class, handler_class):        """        :param model_class: 是models中的数据库表对应的类。        :param handler_class: 处理请求的视图函数所在的类        :return:        """        """        self._registry = [           {'model_class': model.Department,'handler':DepartmentHandler(models.Department)},           {'model_class': model.UserInfo,'handler':UserInfo(models.UserInfo)},            {'model_class': model.Host,'handler':Host(models.Host)},        ]        """        # 注意：handler_class接收的第一个参数是数据库表对应的类        self._registry.append({
   'model_class': model_class, 'handler': handler_class(model_class)})    def get_urls(self):        patterns = []        for item in self._registry:            model_class = item['model_class']            handler = item['handler']            app_name = model_class._meta.app_label  # 获取当前类所在的app            model_name = model_class._meta.model_name  # 获取当前类所在的表名称            patterns.append(re_path(r'%s/%s/list' % (app_name, model_name), handler.list_view))            patterns.append(re_path(r'%s/%s/add' % (app_name, model_name), handler.add_view))            patterns.append(re_path(r'%s/%s/edit' % (app_name, model_name), handler.edit_view))            patterns.append(re_path(r'%s/%s/delete' % (app_name, model_name), handler.delete_view))        return patterns    @property    def urls(self):        return self.get_urls(), self.app_name, self.namespacesite = StarkSite()

 

四、使用strak组件

web/stark.py

from django.shortcuts import HttpResponsefrom stark.service.core_func import sitefrom web import modelsclass DepartmentHandler(object):    def __init__(self, model_class):        self.model_class = model_class    def list_view(self, request):        """        列表页面        :param request:        :return:        """        return HttpResponse('列表页面')    def add_view(self, request):        """        添加页面        :param request:        :return:        """        return HttpResponse('添加页面')    def edit_view(self, request):        """        编辑页面        :param request:        :return:        """        return HttpResponse('编辑页面')    def delete_view(self, request):        """        删除页面        :param request:        :return:        """        return HttpResponse('删除页面')class UserInfoHandler:    def __init__(self, model_class):        self.model_class = model_class    def list_view(self, request):        """        列表页面        :param request:        :return:        """        return HttpResponse('列表页面')    def add_view(self, request):        """        添加页面        :param request:        :return:        """        return HttpResponse('添加页面')    def edit_view(self, request):        """        编辑页面        :param request:        :return:        """        return HttpResponse('编辑页面')    def delete_view(self, request):        """        删除页面        :param request:        :return:        """        return HttpResponse('删除页面')site.register(models.Department, DepartmentHandler)site.register(models.UserInfo, UserInfoHandler)

 

五、注册URL

stark_practice/urls.py

from django.contrib import adminfrom django.urls import path, re_pathfrom stark.service.core_func import siteurlpatterns = [    path('admin/', admin.site.urls),    re_path(r'^stark/', site.urls),]