导入并检查模型
导入模型并查看其中的字段
导入并检查模型 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。
Bring Your Models In
Before you can query data, you import the model class into the shell. Pull it from the app where you defined it.
>>> from blog.models import PostThe App Path Pattern
The import path is always appname.models. So a Post in the blog app lives at blog.models, matching your folder layout.
Confirm It Imported
Type the class name alone to see Django confirm the model. It echoes the class so you know the import worked.
>>> Post
<class 'blog.models.Post'>Every Model Has a Manager
Each model carries a manager called objects. It is your gateway to every query, like fetching or counting rows.
>>> Post.objectsPeek at the Fields
To list a model's columns, read its hidden _meta object. It exposes the fields Django mapped to your table.
>>> Post._meta.get_fields()Field Names at a Glance
A quick comprehension turns that into a clean list of field names, handy when you forget a column.
>>> [f.name for f in Post._meta.get_fields()]Inspect One Field
You can grab a single field by name with get_field. It returns the field object so you can read its details.
>>> Post._meta.get_field('title')Read a Field's Type
Ask a field for its type with type(). This tells you whether a column is a CharField, IntegerField, and so on.
>>> type(Post._meta.get_field('title'))Use Python's help
Plain Python tools still work. Run help on the model to read its docstring and see available attributes.
>>> help(Post)Import More Than One
Need several models? Import them together on one line so you can cross-reference data without retyping.
>>> from blog.models import Post, CommentInspect Before You Query
Inspecting first saves time. Knowing the exact field names prevents typos when you start filtering real records.
Quick Check
How do you list the fields a model defines?
Recap
You imported models with appname.models, met the objects manager, and used _meta to inspect fields before querying. 🔍
常见问题解答
「导入并检查模型」课时是免费的吗？
是的 — 「导入并检查模型」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。
「导入并检查模型」这节课中我会学到什么？
导入模型并查看其中的字段 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 2 节课，共 4 节。
「导入并检查模型」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。