Django中文版指南:从入门到数据建模

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《Django_Book-中文版.pdf》是一本介绍Django Web框架的中文教材,适合Python开发者和希望学习Django的读者。本书详细地讲解了Django的基础知识和核心概念,从Django的历史和所需编程知识开始,引导读者逐步深入。 第1章概述了Django的简介,包括什么是Web框架,MVC(模型-视图-控制器)设计模式,以及Django的发展历程。章节末尾提到了如何高效阅读本书,以及读者需要具备的Python基础知识,特别是对于新特性的了解和获取帮助的方式。 第2章是入门章节,涉及Python和Django的安装过程,包括官方发行版、Subversion版本和不同数据库的支持(如PostgreSQL、SQLite3和MySQL)。此外,还介绍了如何启动一个新的Django项目,以及使用开发服务器的基本操作,明确了后续章节的讨论重点。 在第三章,读者将学习动态网页的基础,包括URL映射到视图、Django处理请求的工作原理、URL配置的松耦合性和错误处理(如404错误)。作者强调了使用漂亮URL的重要性,并介绍了带有通配符的URL匹配模式以及Django的自定义错误页面。 第四章深入探讨Django的模板系统,涵盖了模板的基本知识、模板对象的创建、渲染过程,以及上下文、标签和过滤器的使用。读者可以在这个阶段了解到模板在视图中的应用、模板加载机制和一些高级特性,如模板继承。 第五章着重于数据库操作,讲述了在视图中直接查询数据库的笨拙方法,以及推荐的 MTV(模型-模板-视图)开发模式。章节还包括数据库配置、创建第一个Django应用程序的过程,为数据建模打下坚实的基础。 《Django Book》的后续章节将围绕这些主题展开更深入的内容,旨在帮助读者掌握Django框架的核心技术,构建高效、可维护的Web应用。无论你是初学者还是进阶用户,这本书都是理解Django不可或缺的资源。

Traceback (most recent call last): File "D:\PyCharm Community Edition 2022.3.3\plugins\python-ce\helpers\pydev\pydevconsole.py", line 364, in runcode coro = func() File "<input>", line 1, in <module> File "D:\PyCharm Community Edition 2022.3.3\plugins\python-ce\helpers\pydev\_pydev_bundle\pydev_import_hook.py", line 21, in do_import module = self._system_import(name, *args, **kwargs) File "D:\PythonProject\Django_dianshang\dianshang\utils\loaddata.py", line 2, in <module> from dianshang.goods.models import * File "D:\PyCharm Community Edition 2022.3.3\plugins\python-ce\helpers\pydev\_pydev_bundle\pydev_import_hook.py", line 21, in do_import module = self._system_import(name, *args, **kwargs) File "D:\PythonProject\Django_dianshang\dianshang\goods\models.py", line 7, in <module> class Category(models.Model): File "D:\anaconda3\envs\djangopro\lib\site-packages\django\db\models\base.py", line 129, in __new__ app_config = apps.get_containing_app_config(module) File "D:\anaconda3\envs\djangopro\lib\site-packages\django\apps\registry.py", line 260, in get_containing_app_config self.check_apps_ready() File "D:\anaconda3\envs\djangopro\lib\site-packages\django\apps\registry.py", line 137, in check_apps_ready settings.INSTALLED_APPS File "D:\anaconda3\envs\djangopro\lib\site-packages\django\conf\__init__.py", line 102, in __getattr__ self._setup(name) File "D:\anaconda3\envs\djangopro\lib\site-packages\django\conf\__init__.py", line 82, in _setup raise ImproperlyConfigured( django.core.exceptions.ImproperlyConfigured: Requested setting INSTALLED_APPS, but settings are not configured. You must either define the environment variable DJANGO_SETTINGS_MODULE or call settings.configure() before accessing settings.

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Traceback (most recent call last): File "D:\PyCharm Community Edition 2022.3.3\plugins\python-ce\helpers\pydev\pydevconsole.py", line 364, in runcode coro = func() File "<input>", line 1, in <module> File "D:\PyCharm Community Edition 2022.3.3\plugins\python-ce\helpers\pydev\_pydev_bundle\pydev_import_hook.py", line 21, in do_import module = self._system_import(name, *args, **kwargs) File "D:\PythonProject\Django_dianshang\utils\loaddata.py", line 2, in <module> from goods.models import * File "D:\PyCharm Community Edition 2022.3.3\plugins\python-ce\helpers\pydev\_pydev_bundle\pydev_import_hook.py", line 21, in do_import module = self._system_import(name, *args, **kwargs) File "D:\PythonProject\Django_dianshang\goods\models.py", line 7, in <module> class Category(models.Model): File "D:\anaconda3\envs\djangopro\lib\site-packages\django\db\models\base.py", line 129, in __new__ app_config = apps.get_containing_app_config(module) File "D:\anaconda3\envs\djangopro\lib\site-packages\django\apps\registry.py", line 260, in get_containing_app_config self.check_apps_ready() File "D:\anaconda3\envs\djangopro\lib\site-packages\django\apps\registry.py", line 137, in check_apps_ready settings.INSTALLED_APPS File "D:\anaconda3\envs\djangopro\lib\site-packages\django\conf\__init__.py", line 102, in __getattr__ self._setup(name) File "D:\anaconda3\envs\djangopro\lib\site-packages\django\conf\__init__.py", line 82, in _setup raise ImproperlyConfigured( django.core.exceptions.ImproperlyConfigured: Requested setting INSTALLED_APPS, but settings are not configured. You must either define the environment variable DJANGO_SETTINGS_MODULE or call settings.configure() before accessing settings.

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