效果图：

 

 

 

Handler类里处理的增删改查、路由分发、给URL设置别名等包括以后还要添加的很多功能，每一个数据库的类都需要，所以我们要把Handler提取成一个基类。提取成基类后，每一个数据表都可以继承这个基类，然后有需要的话可以在这个基类的基础上重写函数，定制自己的方法。

 

Handler下新增函数get_urls是为了解耦Stark类下的get_urls

一、stark组件

stark/service/core_func.py

from django.urls import re_pathfrom django.shortcuts import HttpResponse, renderclass StarkHandler(object):    def __init__(self, model_class, prev=None):        self.model_class = model_class        self.prev = prev    def list_view(self, request):        """        列表页面        :param request:        :return:        """        data_list = self.model_class.objects.all()        return render(request, 'stark/data_list.html', {
   'data_list': data_list})    def add_view(self, request):        """        添加页面        :param request:        :return:        """        return HttpResponse('添加页面')    def edit_view(self, request, pk):        """        编辑页面        :param request:        :return:        """        return HttpResponse('编辑页面')    def delete_view(self, request, pk):        """        删除页面        :param request:        :param pk:        :return:        """        return HttpResponse('删除页面')    def get_urls(self):        app_name, model_name = self.model_class._meta.app_label, self.model_class._meta.model_name        if self.prev:            patterns = [                re_path(r'^list/$', self.list_view, name="%s_%s_%s_list" % (app_name, model_name, self.prev)),                re_path(r'^add/$', self.add_view, name="%s_%s_%s_add" % (app_name, model_name, self.prev)),                re_path(r'^edit/(\d+)/$', self.edit_view, name="%s_%s_%s_edit" % (app_name, model_name, self.prev)),                re_path(r'^delete/(\d+)/$', self.delete_view,                        name="%s_%s_%s_delete" % (app_name, model_name, self.prev)),            ]        else:            patterns = [                re_path(r'^list/$', self.list_view, name="%s_%s_list" % (app_name, model_name,)),                re_path(r'^add/$', self.add_view, name="%s_%s_add" % (app_name, model_name,)),                re_path(r'^edit/(\d+)/$', self.edit_view, name="%s_%s_edit" % (app_name, model_name,)),                re_path(r'^delete/(\d+)/$', self.delete_view,                        name="%s_%s_delete" % (app_name, model_name,)),            ]        patterns.extend(self.extra_urls())        return patterns    def extra_urls(self):        return []class StarkSite(object):    def __init__(self):        self._registry = []        self.app_name = 'stark'        self.namespace = 'stark'    def register(self, model_class, handler_class=None, prev=None):        """        :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        :param prev: 生成URL的前缀        :return:        """        if not handler_class:            handler_class = StarkHandler        self._registry.append({
    'model_class': model_class, 'handler': handler_class(model_class, prev), 'prev': prev})    def get_urls(self):        patterns = []        for item in self._registry:            model_class = item['model_class']            handler = item['handler']            prev = item['prev']            app_name, model_name = model_class._meta.app_label, model_class._meta.model_name            if prev:                patterns.append(                    re_path(r'^%s/%s/%s/' % (app_name, model_name, prev,), (handler.get_urls(), None, None)))            else:                patterns.append(re_path(r'^%s/%s/' % (app_name, model_name,), (handler.get_urls(), None, None)))        return patterns    @property    def urls(self):        return self.get_urls(), self.app_name, self.namespacesite = StarkSite()

 

二、业务处理

web/stark.py

from django.urls import re_pathfrom django.shortcuts import HttpResponsefrom stark.service.core_func import site, StarkHandlerfrom web import modelsclass DepartmentHandler(StarkHandler):    def extra_urls(self):        """        增加额外的URL        :return:        """        # 给部门增加了详情页：/stark/web/department/private/detail/1        return [            re_path(r'^detail/(\d+)', self.detail_view)        ]    def detail_view(self, request, pk):        return HttpResponse('详细页面')class UserInfoHandler(StarkHandler):    def get_urls(self):        """        修改url        :return:        """        # 用户信息只有list和add的url        patterns = [            re_path(r'^list/$', self.list_view),            re_path(r'^add/$', self.add_view),        ]        return patternssite.register(models.Department, DepartmentHandler, prev='private')  # 给部门的url增加了前缀：/stark/web/department/private/site.register(models.UserInfo, UserInfoHandler)