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在 INSTALLED_APPS 中注册应用

让 Django 识别您的新应用

在 INSTALLED_APPS 中注册应用 是 CoddyKit 上的免费 Django Academy 课时。这是第 2 节课，共 4 节。你可以在下方免费阅读本课时的完整内容 — 然后在浏览器中使用内置代码编辑器和全天候 AI 导师进行实践。这是 Django Academy 学习路径的一部分，你的进度在网页和 CoddyKit 应用中同步。 Django Academy 课程共包含 4 节课。

本课时的部分内容尚未翻译，以英文显示。

Django Must Be Told

Creating an app folder is not enough. Django only activates an app once you add it to the INSTALLED_APPS list in settings.

Find the List

Open settings.py and look near the top for INSTALLED_APPS. It is a plain Python list of strings, one per active app.

INSTALLED_APPS = [
    "django.contrib.admin",
]

Built-in Apps Are Already There

You will see entries like django.contrib.auth and admin. These ship with Django and power features you get for free.

Add Your App

To switch on your app, add its name as a string to the list. The simple form is just the app's folder name.

INSTALLED_APPS = [
    "django.contrib.admin",
    "blog",
]

The Cleaner AppConfig Path

The recommended form points to the config class in apps.py. Using the full AppConfig path is the modern Django convention.

INSTALLED_APPS = [
    "blog.apps.BlogConfig",
]

Why Registration Matters

Once registered, Django can find your models, templates, and admin entries. Skip this step and your features simply will not load.

Unlocks Migrations

Migrations only run for apps in the list. Without registration, makemigrations ignores your models and no tables get created.

Order Can Matter

Django reads INSTALLED_APPS top to bottom. Order rarely matters, but it can affect template and static file lookups when names clash.

Mind the Commas

It is a Python list, so every entry needs a trailing comma. A missing comma is a classic, confusing beginner error here.

Verify It Loaded

After editing, run the dev server. If Django starts without an error about your app, the registration worked correctly.

python manage.py runserver

Third-Party Apps Too

Installed packages like Django REST Framework also go in this list. Registering them is what turns a pip install into working features.

Quick Check

What happens to your app's models if you forget INSTALLED_APPS?

Recap: App Switched On

You added your app to INSTALLED_APPS, ideally via its AppConfig path. That one line lets Django load your models, admin, and migrations. ✅

常见问题解答

「在 INSTALLED_APPS 中注册应用」课时是免费的吗？

是的 — 「在 INSTALLED_APPS 中注册应用」的完整文本可在网页上免费阅读。要进行交互式练习（内置代码编辑器和全天候 AI 导师）并解锁 Django Academy 课程的其余内容，请升级到 CoddyKit PRO。 Django Academy 课程共包含 4 节课。

「在 INSTALLED_APPS 中注册应用」这节课中我会学到什么？

让 Django 识别您的新应用你通过在浏览器中直接运行的动手代码来练习 Django Academy，全天候 AI 导师会在你学习这节课的过程中回答你的问题。

学习 Django Academy 需要有经验吗？

无需任何先前经验。CoddyKit 上的 Django Academy 课程适合初学者到高级学习者，你可以从这里开始或从头开始，按照自己的节奏学习。这是第 2 节课，共 4 节。

「在 INSTALLED_APPS 中注册应用」课时需要多长时间？

大多数 CoddyKit 课程大约需要 5–10 分钟。每节课都很精短且互动，所以你能稳步进步，并在网页和应用中从离开的地方继续。

我能在这节 Django Academy 课中编写并运行代码吗？

能。每节 Django Academy 课都包含内置代码编辑器，你可以在浏览器中直接编写并运行真实代码，并获得即时 AI 反馈 — 无需本地设置。

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