10.16 正式开发stark组件(一)

2018-10-16 17:26:44

Django MTV  路由配置里面有 反向解析

参考连接:https://www.cnblogs.com/yuanchenqi/articles/7629939.html

　　　　https://www.cnblogs.com/yuanchenqi/articles/7629939.html#_label2

这个就是仿照Django的admin做的! 这是1.0版本,后面还得迭代!

明天开始整理自己博客!这几天一直在看视频!

我觉得温故而习之,可以为师矣!!明天回顾一下整理博客还是很有必要的!

放上stark1.0代码 后期继续优化,等有完整版的放到github里面

strak是创建的新的app,需要在settings里面注册一下

stark/service/stark.py

from django.conf.urls import url
from django.shortcuts import HttpResponse, render
# 超级用户  root root1234

class ModelStark(object):
    """父类默认配置类"""
    # 默认为空
    list_display = []

    def __init__(self, model, site):
        self.model = model
        self.site = site

    def add(self,  request):
        return HttpResponse("add")

    def delete(self, request, id):
        return HttpResponse("delete")

    def change(self, request, id):
        return HttpResponse("change")

    def list_view(self, request):
        data_list = self.model.objects.all()    # 【obj1,obj2,....】
        new_data_list = []
        for obj in data_list:
            temp = []
            for filed in self.list_display:     # ["pk","name","age",edit]
                if callable(filed):     # 判断循环字段是字符串还是函数
                    val = filed(self, obj)
                else:
                    val = getattr(obj, filed)
                temp.append(val)
            new_data_list.append(temp)

        '''
        [
            [1,"alex",12],

                 ]

        '''
        return render(request, "list_view.html", locals())

    def get_urls_2(self):
        """实现二级分发"""
        temp = []
        # 通过方法 找到表的名字和 app的名字
        model_name = self.model._meta.model_name
        app_label = self.model._meta.app_label
        # 反向解析,给url起名字,
        temp.append(url(r"^add/", self.add, name="%s_%s_add" % (app_label, model_name)))
        temp.append(url(r"^(\d+)/delete/", self.delete, name="%s_%s_delete" % (app_label, model_name)))
        temp.append(url(r"^(\d+)/change/", self.change, name="%s_%s_change" % (app_label, model_name)))
        temp.append(url(r"^$", self.list_view, name="%s_%s_list" % (app_label, model_name)))

        return temp

    @property
    def urls_2(self):
        # 二级分发 和一级分发一样
        return self.get_urls_2(), None, None

class StarkSite(object):
    def __init__(self):
        self._registry={}

    def register(self,model,stark_class=None):
        if not stark_class:
            stark_class=ModelStark

        self._registry[model] = stark_class(model, self)

    def get_urls(self):
        """一级分发"""
        temp = []
        for model, stark_class_obj in self._registry.items():
            model_name = model._meta.model_name
            app_label = model._meta.app_label
            # 分发增删改查
            # stark_class_obj是传入配置类的实例对象,由于该类继承了ModelStark,则解耦直接调用父类方法
            temp.append(url(r"^%s/%s/" % (app_label, model_name), stark_class_obj.urls_2))

            '''
            url(r"^app01/userinfo/",UserConfig(Userinfo).urls_2),
            url(r"^app01/book/",ModelStark(Book).urls_2), 

            '''
        return temp

    @property
    def urls(self):
        # 返回一个([], None, None)
       return self.get_urls(), None, None

# 创建单例对象
site = StarkSite()

app01/stark.py

from stark.service.stark import site, ModelStark
from django.urls import reverse         # 反向解析导入的包
from .models import *
from django.utils.safestring import mark_safe   # 防止转译

class UserConfig(ModelStark):
    """UserInfo的表的配置类"""
    def edit(self, obj):
        # return mark_safe("<a href='%s/change'>编辑</a>"%obj.pk)
        model_name = self.model._meta.model_name
        app_label = self.model._meta.app_label
        # 反向解析如果需要传参(带正则),则必须传参
        _url = reverse("%s_%s_change"%(app_label,model_name),args=(obj.pk,))
        print("_url", _url)
        return mark_safe("<a href='%s'>编辑</a>"%_url)

    def deletes(self, obj):
        # return mark_safe("<a href='%s/change'>编辑</a>"%obj.pk)
        model_name = self.model._meta.model_name
        app_label = self.model._meta.app_label
        _url = reverse("%s_%s_delete" % (app_label, model_name), args=(obj.pk,))
        print("_url", _url)
        return mark_safe("<a href='%s'>删除</a>" % _url)

    def checkbox(self, obj):
        return mark_safe('<input type="checkbox">')
    list_display = [checkbox, "pk", "name", "age", edit, deletes]

site.register(UserInfo, UserConfig)

class BookConfig(ModelStark):
    list_display = ["pk", "title"]

site.register(Book)

urls.py

from django.conf.urls import url
from django.contrib import admin
from stark.service.stark import site

urlpatterns = [
    url(r'^admin/', admin.site.urls),
    url(r'^stark/', site.urls),
]

app01/models.py

from django.db import models

class UserInfo(models.Model):
    name = models.CharField(max_length=32)
    age = models.IntegerField()

    def __str__(self):
        return self.name

class Book(models.Model):
    title = models.CharField(max_length=32)

    def __str__(self):
        return self.title

里面有注释,按照流程一步一步走,还是很清楚!

Django的admin做的最好的就是通过类来解耦,降低耦合性!!!!这篇是昨天的迭代,增加部分views东西!有不懂的可以看昨天的博客!

放上笔记!

上节回顾

1   admin的使用
    list_display
    list_display_links
    search_fields
    list_filter
    action

    class BookConfig(admin.ModelAdmin):
        list_display
        list_display_links
        search_fields
        list_filter
        action
    admin.site.register(Book,BookConfig)

2   知识点

    url()的使用

    情况1：url(r'^book/', views.book),  # book(request)

    情况2 分发：
    url(r"^yuan/", ([
                       url(r'^test01/', ([
                                             url(r'^test04/', test04),
                                             url(r'^test05/', test05),
                                         ], None, None)),
                       url(r'^test02/', test02),
                       url(r'^test03/', test03),
                   ], None, None)
       )

    单例模式
       生成单例模式的方式：
       （1）使用 __new__
       （2）使用模块
            class A()
               pass
            a=A()

            admin源码:
            1 启动文件
            class StarkConfig(AppConfig):
               name = 'stark'
               def ready(self):
                   autodiscover_modules('stark')

            2 注册 admin.py

                admin.site.register(Book,BookConfig)

                源码：

                    class AdminSite():
                         def __init__(self, name='admin'):
                             self._registry = {}

                         def register(self,model,admin_class):
                             if not admin_class:
                                  admin_class = ModelAdmin

                             self._registry[model] = admin_class(model, self)

                    site=AdminSite()

            3 设计url

                如何通过model类变量获取该模型的字符串名称和该模型所在app的字符串名称：
                print("===>", model._meta.model_name)
                print("===>", model._meta.app_label)

在ModelStark中：
       self.model: 用户当前访问的模型表

 查看页面：
      表头
      表数据
      search
      action
      分页
      filter

  增删改（modelForm）

   pop

   作业1：

       访问任何模型时都有编辑，删除，选择
   作业2：
       如果用户没有配置list_display,显示对象
    作业3:
        名称空间