stark组件开发之自动生成URL

本文主要是介绍stark组件开发之自动生成URL，对大家解决编程问题具有一定的参考价值，需要的程序猿们随着小编来一起学习吧！

创建一个新的django project，新建3个app并进行注册(app01/app02/stark)

luffy_stark/settings.py

INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'app01.apps.App01Config',
    'app02.apps.App02Config',
    'stark.apps.StarkConfig',
]

创建基础业务表

app01/models.py

from django.db import models

# Create your models here.


class Depart(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,
    )
    depart = models.ForeignKey(
        verbose_name="部门",
        to="Depart",
        on_delete=models.CASCADE,
    )

app02/models.py

from django.db import models

# Create your models here.


class Host(models.Model):
    """主机表"""
    host = models.CharField(
        verbose_name="主机名称",
        max_length=32,
    )
    ip = models.GenericIPAddressField(
        verbose_name="ip",
        protocol="both",
    )

在stark app下的apps.py中书写ready方法

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")

在stark app下的service目录下的v1.py书写一个类，该类有4个方法，第一个__init__初始化方法为类绑定了3个变量，第二个register方法为每个models中的数据表类及处理请求的视图函数的类构建成一个字典放入到类变量中的列表，第三个get_urls方法自动为每个models中的数据表类生成URL并绑定对应的视图函数，数据格式为路由格式，添加到一个列表中，第四个urls方法返回一个含有3个元素的元组，第一个元素为get_urls方法返回的列表，该列表有子路由，第二个元素为类变量所定义的app_name，第三个元素为类变量所定义的namespace

stark/service/v1.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中的数据库相关的类
        :param handler_class: 处理请求的视图函数所在的类
        :return:
        """
        self._registry.append({"model_class": model_class, "handler_class": handler_class(model_class),})
        """
        self._registry = [
            {"model_class": models.Depart, "handler_class": DepartHandler(models.Depart)},
            {"model_class": models.UserInfo, "handler_class": UserInfoHandler(models.UserInfo)},
            {"model_class": models.Host, "handler_class": HostHandler(models.Host)},
        ]
        """

    def get_urls(self):
        patterns = []
        for item in self._registry:
            model_class = item["model_class"]
            handler = item["handler_class"]
            # model_class._meta.app_label = app01/app01/app02/app02
            # model_class._meta.model_name = depart/userinfo/host/role
            app_label, model_name = model_class._meta.app_label, model_class._meta.model_name
            patterns.append(re_path(r'^%s/%s/list/$' % (app_label, model_name), handler.changelist_view),)
            patterns.append(re_path(r'^%s/%s/add/$' % (app_label, model_name), handler.add_view),)
            patterns.append(re_path(r'^%s/%s/change/(\d+)/$' % (app_label, model_name), handler.change_view),)
            patterns.append(re_path(r'^%s/%s/del/(\d+)/$' % (app_label, model_name), handler.delete_view),)
        return patterns

    @property
    def urls(self):
        return self.get_urls(), self.app_name, self.namespace


site = StarkSite()

"""
patterns = [
        <URLPattern '^app01/depart/list/$'>,
        <URLPattern '^app01/depart/add/$'>,
        <URLPattern '^app01/depart/change/(\d+)/$'>,
        <URLPattern '^app01/depart/del/(\d+)/$'>,
        <URLPattern '^app01/userinfo/list/$'>,
        <URLPattern '^app01/userinfo/add/$'>,
        <URLPattern '^app01/userinfo/change/(\d+)/$'>,
        <URLPattern '^app01/userinfo/del/(\d+)/$'>,
        <URLPattern '^app02/host/list/$'>,
        <URLPattern '^app02/host/add/$'>,
        <URLPattern '^app02/host/change/(\d+)/$'>,
        <URLPattern '^app02/host/del/(\d+)/$'>,
]
"""

app01/stark.py

from stark.service.v1 import site
from app01 import models
from django.shortcuts import HttpResponse


class DepartHandler(object):
    def __init__(self, model_class):
        self.model_class = model_class

    def changelist_view(self, request):
        """
        列表页面
        :param request:
        :return:
        """
        return HttpResponse("部门列表页面")

    def add_view(self, request):
        """
        添加页面
        :param request:
        :return:
        """
        pass

    def change_view(self,request, pk):
        """
        编辑页面
        :param request:
        :param pk:
        :return:
        """
        pass

    def delete_view(self, request, pk):
        """
        删除页面
        :param request:
        :param pk:
        :return:
        """
        pass


class UserInfoHandler(object):
    def __init__(self, model_class):
        self.model_class = model_class

    def changelist_view(self, request):
        """
        列表页面
        :param request:
        :return:
        """
        return HttpResponse("用户列表页面")

    def add_view(self, request):
        """
        添加页面
        :param request:
        :return:
        """
        pass

    def change_view(self,request, pk):
        """
        编辑页面
        :param request:
        :param pk:
        :return:
        """
        pass

    def delete_view(self, request, pk):
        """
        删除页面
        :param request:
        :param pk:
        :return:
        """
        pass


site.register(models.Depart, DepartHandler)
site.register(models.UserInfo, UserInfoHandler)

app02/stark.py

from stark.service.v1 import site
from app02 import models
from django.shortcuts import HttpResponse


class HostHandler(object):
    def __init__(self, model_class):
        self.model_class = model_class

    def changelist_view(self, request):
        """
        列表页面
        :param request:
        :return:
        """
        return HttpResponse("主机列表页面")

    def add_view(self, request):
        """
        添加页面
        :param request:
        :return:
        """
        pass

    def change_view(self,request, pk):
        """
        编辑页面
        :param request:
        :param pk:
        :return:
        """
        pass

    def delete_view(self, request, pk):
        """
        删除页面
        :param request:
        :param pk:
        :return:
        """
        pass


site.register(models.Host, HostHandler)

luffy_stark/urls.py

from django.contrib import admin
from django.urls import path, re_path
from stark.service.v1 import site


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

将数据库迁移好后，启动django项目(在修改配置中加入--noreload)，浏览器输入路由查看

 此时，已经能够自动生成URL了，我们再新建一个model类看一下，在app02下的models.py中新建一个Role类

app02/models.py

from django.db import models


class Role(models.Model):
    """角色"""
    title = models.CharField(
        verbose_name="角色名称",
        max_length=32,
    )

app02/stark.py

from stark.service.v1 import site
from app02 import models
from django.shortcuts import HttpResponse


class RoleHandler(object):
    def __init__(self, model_class):
        self.model_class = model_class

    def changelist_view(self, request):
        """
        列表页面
        :param request:
        :return:
        """
        return HttpResponse("角色列表页面")

    def add_view(self, request):
        """
        添加页面
        :param request:
        :return:
        """
        pass

    def change_view(self,request, pk):
        """
        编辑页面
        :param request:
        :param pk:
        :return:
        """
        pass

    def delete_view(self, request, pk):
        """
        删除页面
        :param request:
        :param pk:
        :return:
        """
        pass


site.register(models.Role, RoleHandler)

做数据库迁移，python manage.py makemigrations/python manage.py migrate，然后重新启动django项目，查看是否为Role数据表类自动创建了URL

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