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内联编辑与只读字段

行内编辑相关行并保护字段

内联编辑与只读字段 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。

Edit Related Rows Together

Sometimes related records belong on the same page. An inline lets you edit child rows right inside their parent's edit form. 🧩

Two Inline Styles

Django offers two layouts. A TabularInline shows rows in a compact table, while StackedInline stacks each row as its own block.

Define an Inline

Create a small class that subclasses TabularInline and points its model attribute at the child model you want to embed.

class CommentInline(admin.TabularInline):
    model = Comment

Attach to the Parent

List your inline on the parent's admin. The inlines option tells Django to render those child rows inside the parent form.

class PostAdmin(admin.ModelAdmin):
    inlines = [CommentInline]

Spare Blank Rows

Inlines show empty rows for quick adding. Set extra to control how many blank slots appear, often just one is enough.

extra = 1

The FK Requirement

Inlines only work when the child has a ForeignKey to the parent. That link is how Django knows which rows belong together.

Protect a Field

Some values should be visible but never edited by hand. Add them to readonly_fields and the admin shows them locked. 🔒

readonly_fields = ("created", "updated")

Auto Timestamps

Fields like an auto_now_add date are set by Django, not people. Marking them readonly avoids confusing, unsaveable edits.

Show a Computed Value

readonly_fields can name a method too, letting you display a calculated value that has no real database column.

def word_count(self, obj):
    return len(obj.body.split())

Readonly Inside Inlines

Inlines accept readonly_fields as well. Use it to display child data clearly while keeping sensitive columns uneditable.

Permissions Still Apply

Readonly is about the form, not security. Real access is governed by user permissions, so combine both for safe editing.

Quick Check

What is required for a model to appear as an inline?

Recap

You embedded related rows with inlines and locked sensitive values using readonly_fields. Together they make admin editing rich yet safe. ✅

常见问题解答

「内联编辑与只读字段」课时是免费的吗？

是的 — 「内联编辑与只读字段」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。

「内联编辑与只读字段」这节课中我会学到什么？

行内编辑相关行并保护字段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。

「内联编辑与只读字段」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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