项目启动时自动生成URL
效果图：
知识点：
- 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
- 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）。
- 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 models class 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 AppConfig
from django.utils.module_loading import autodiscover_modules class 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_path class 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.namespace site = StarkSite()
四、使用strak组件
web/stark.py
from django.shortcuts import HttpResponse
from stark.service.core_func import site from web import models class 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 admin
from django.urls import path, re_path from stark.service.core_func import site urlpatterns = [
path('admin/', admin.site.urls),
re_path(r'^stark/', site.urls), ]