stark - 注册表、生成url

一、配置

stark组件开发，仿django自带得admin组件。

1. startapp stark

2. settings: 'stark.apps.StarkConfig'

3. 启动就执行

   from django.apps import AppConfig
   from django.utils.module_loading import autodiscover_modules

   class StarkConfig(AppConfig):
       name = 'stark'

       # 程序启动时，扫描app下得指定文件（stark.py）并执行
       def ready(self):
           autodiscover_modules('stark')      

4.models.py (一对一，一对多，多对多)

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",to_field="nid", 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)

    def __str__(self):
        return str(self.telephone)

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(verbose_name='名称', max_length=32)
    publishDate = models.DateField()
    price = models.DecimalField(verbose_name='价格', 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("Author")

    def __str__(self):
        return self.title

models.py

makemigrations

migrate

createsuperuser （yuan yuan1234）

5.admin.py

from django.contrib import admin

# Register your models here.

from .models import *

class BookConfig(admin.ModelAdmin):
    list_display = ['title', 'price', 'publish']
    list_filter = ['title', 'publish', 'authors']
    # list_display_links = ['price']
    def patch_init(self, request, queryset):
        print(queryset)   # <QuerySet [<Book: shu 2>, <Book: gOy>]>
        queryset.update(price=100)

    patch_init.short_description = '批量初始化'

    actions = [patch_init]

admin.site.register(Book, BookConfig)
admin.site.register(Author)
admin.site.register(AuthorDetail)
admin.site.register(Publish)

admin.py

二、注册表

知识点：

单例对象，全局得！

　　site = StarkSite()

注册：{ ... }

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

stark.site.register(Book, BookConfig)

stark.site.register(Publish)

print(stark.site._registry)

{<class 'app01.models.Book'>: <app01.stark.BookConfig object at 0x000002423EC9F710>,

<class 'app01.models.Publish'>: <stark.service.stark.ModelStark object at 0x000002423EC9F748>,

 

stark/service/stark.py (单例)

class ModelStark(object):
    list_display = []

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

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)

site = StarkSite()

app01/stark.py

from stark.service import stark
from .models import *

class BookConfig(stark.ModelStark):
    pass

stark.site.register(Book, BookConfig)
stark.site.register(Publish)
stark.site.register(Author)
stark.site.register(AuthorDetail)

print(stark.site._registry)

"""
{<class 'app01.models.Book'>: <app01.stark.BookConfig object at 0x000002423EC9F710>,
<class 'app01.models.Publish'>: <stark.service.stark.ModelStark object at 0x000002423EC9F748>,
<class 'app01.models.Author'>: <stark.service.stark.ModelStark object at 0x000002423EC9F898>,
<class 'app01.models.AuthorDetail'>: <stark.service.stark.ModelStark object at 0x000002423EC9FCC0>}

"""

三、生成url

知识点：

　　1. url分发：

url(r'^stark/', ([],None,None))

url(r'^stark/', stark.site.urls)

@property
def urls(self):
　　return self.get_urls(), None, None

　　2. 用户可以自定制配置页面，所以调用配置类 stark_class_obj.urls2

# 分发增删改查
temp.append(url(r'%s/%s/'%(app_label,model_name), stark_class_obj.urls2))

　　

　　3. 名称空间，之后可以反向解析，灵活应用

model_name = self.model._meta.model_name
app_label = self.model._meta.app_label

# print(model_name, app_label)
"""
book app01
publish app01
author app01
authordetail app01
"""
temp.append(url(r'add/', self.add_view, name="%s_%s_add" % (app_label, model_name)))
temp.append(url(r'(\d+)/delete/', self.delete_view, name="%s_%s_delete" % (app_label, model_name)))
temp.append(url(r'(\d+)/change/', self.change_view, name="%s_%s_change" % (app_label, model_name)))
temp.append(url(r'^$', self.list_view, name="%s_%s_list" % (app_label, model_name)))

　　

　　4.ModelStark

ModelStark()
    self.model:用户访问的模型表

　　

  

urls.py

from django.conf.urls import url
from django.contrib import admin

from stark.service import stark

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

stark/service/stark.py (url分发)

from django.conf.urls import url
from django.shortcuts import HttpResponse, reverse, redirect

class ModelStark(object):
    list_display = []

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

    def add_view(self, request):
        return HttpResponse('add_view')

    def delete_view(self, request, delete_id):
        return HttpResponse('delete_view')

    def change_view(self, request, change_id):
        return HttpResponse('change_view')

    def list_view(self, request):
        return HttpResponse('list_view')

    def get_urls2(self):
        temp = []

        model_name = self.model._meta.model_name
        app_label = self.model._meta.app_label

        # print(model_name, app_label)
        """
        book app01
        publish app01
        author app01
        authordetail app01
        """
        temp.append(url(r'add/', self.add_view, name="%s_%s_add" % (app_label, model_name)))
        temp.append(url(r'(\d+)/delete/', self.delete_view, name="%s_%s_delete" % (app_label, model_name)))
        temp.append(url(r'(\d+)/change/', self.change_view, 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 urls2(self):

        return self.get_urls2(), 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):
        temp = []

        # 模型表，配置类对象
        for model, stark_class_obj in self._registry.items():
            # print(model,'---',stark_class_obj)
            """
            <class 'app01.models.Book'> --- <app01.stark.BookConfig object at 0x000001F03A8BF7F0>
            <class 'app01.models.Publish'> --- <stark.service.stark.ModelStark object at 0x000001F03A8BF748>
            """
            model_name = model._meta.model_name
            app_label = model._meta.app_label

            # 分发增删改查
            temp.append(url(r'%s/%s/'%(app_label,model_name), stark_class_obj.urls2))
　　　　　　

　　　　 　　"""
　　　　    　　path('app01/userinfo/',UserConfig(Userinfo,site).urls2),
　　　　　　    path('app01/book/',ModelStark(Book,site).urls2),
　　　　　　 """

　　　　 return temp

    @property
    def urls(self):

        return self.get_urls(), None, None

site = StarkSite()