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状态码与 HttpResponse 子类

使用 JsonResponse、重定向与 404 辅助工具

状态码与 HttpResponse 子类 是 CoddyKit 上的免费 Django Academy 课时。这是第 4 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 Status Codes Mean

Every response carries a status code. The number tells the browser if things went well, moved, or broke. 🚦

The Friendly 2xx Codes

Codes in the 2xx range mean success. 200 is the everyday OK, and 201 signals that something new was created.

Redirects in the 3xx Range

A 3xx code tells the browser to go elsewhere. 301 is a permanent move, while 302 is a temporary redirect.

Client Errors: 4xx

The 4xx codes blame the request. 404 means not found, 403 means forbidden, and 400 means a bad request.

JsonResponse for APIs

Use JsonResponse to send data as JSON. Pass a dict and Django sets the right content type for you.

return JsonResponse({"name": "Ada"})

Redirecting with redirect

The redirect shortcut returns a 302 to another URL or view name, so users land exactly where you want them.

return redirect('home')

HttpResponseRedirect

Behind redirect sits HttpResponseRedirect. Give it a URL and it builds the 302 response for you directly.

return HttpResponseRedirect('/login/')

Permanent Redirects

For a permanent move, use HttpResponsePermanentRedirect, which sends a 301 so browsers remember the new address.

Raising a 404

Raise Http404 when a record is missing. Django catches it and shows your not-found page with a 404 code.

raise Http404("No such post")

get_object_or_404

The get_object_or_404 helper fetches a row or raises Http404 automatically, saving you a manual check.

post = get_object_or_404(Post, pk=3)

Pick the Right Subclass

Choosing the right subclass sets a correct status with no manual numbers, keeping your views clear and honest.

Quick Check

Which response sends JSON with the correct content type?

Recap: Speak in Codes

Status codes and HttpResponse subclasses like JsonResponse, redirect, and Http404 let your views answer clearly. 🚀

常见问题解答

「状态码与 HttpResponse 子类」课时是免费的吗？

是的 — 「状态码与 HttpResponse 子类」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。

「状态码与 HttpResponse 子类」这节课中我会学到什么？

使用 JsonResponse、重定向与 404 辅助工具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 4 节课，共 4 节。

「状态码与 HttpResponse 子类」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。

此课程中的所有课时

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