Django Academy · 课时

编写基于函数的视图

创建一个返回响应的视图

编写基于函数的视图 是 CoddyKit 上的免费 Django Academy 课时。这是第 1 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。

What a View Really Is

A Django view is just a Python function that takes a request and returns a response. That is the whole contract. 🙂

The First Argument: request

Every view's first parameter is the request object. Django hands it to you automatically when a URL matches your view.

Importing HttpResponse

To send something back, you return an HttpResponse. Import it from django.http before you use it.

from django.http import HttpResponse

Your First View

Here is a complete, working view. It takes request and returns plain text in a response.

from django.http import HttpResponse

def home(request):
    return HttpResponse('Hello, Django!')

Where Views Live

By convention, views go in your app's views.py file. Keeping them there makes them easy to find and wire up later.

You Must Return Something

A view that returns None raises an error. Django expects an HttpResponse every single time, with no exceptions.

Returning HTML

The response body is just a string, so you can put HTML inside it. The browser renders it like any page.

def home(request):
    return HttpResponse('<h1>Welcome</h1>')

Views Are Plain Functions

A view is normal Python, so you can run logic inside it: build a message, check a condition, then return your response.

def greet(request):
    name = 'friend'
    return HttpResponse('Hi ' + name)

Naming Your View

Name views after what they do, like home or about. Clear names make your URL file readable when you connect them.

Function-Based vs Class-Based

This style is a function-based view, the simplest kind. Class-based views come later; functions are perfect to start with.

Nothing Runs Until It Is Mapped

A view does nothing on its own. It only runs when a URL points to it, which is the very next step you will learn.

Quick Check

Let's confirm the core contract of a Django view.

Recap: You Wrote a View

A view is a function that takes request and returns an HttpResponse. You import it, write your logic, and live in views.py. 🎉

常见问题解答

「编写基于函数的视图」课时是免费的吗？

是的 — 「编写基于函数的视图」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。

「编写基于函数的视图」这节课中我会学到什么？

创建一个返回响应的视图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 1 节课，共 4 节。

「编写基于函数的视图」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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