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在工厂中注册蓝图

在组装应用期间连接所有蓝图

在工厂中注册蓝图 是 CoddyKit 上的免费 Flask 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 Flask Academy 学习路径的一部分，你的进度在网页和 CoddyKit 应用中同步。 Flask 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。

The Final Assembly

With the app built and extensions bound, the last factory job is wiring up your routes. You do that by registering blueprints. 🧩

A Quick Blueprint Recall

A blueprint groups related routes into a reusable module. The factory is exactly where you attach those groups to the app.

from flask import Blueprint
main = Blueprint("main", __name__)

Register Inside create_app

Import each blueprint and call app.register_blueprint on the fresh app, all within the factory body.

def create_app():
    app = Flask(__name__)
    from .main import main
    app.register_blueprint(main)
    return app

Import Inside the Function

Notice the blueprint import sits inside create_app. This deferred import is the trick that breaks circular import chains.

Add a URL Prefix

Give a blueprint its own path namespace with url_prefix at registration time, keeping related routes neatly grouped.

app.register_blueprint(api, url_prefix="/api")

Register Several

Real apps have many blueprints. Register each one in the factory, and each contributes its own slice of routes to the app.

app.register_blueprint(auth)
app.register_blueprint(blog)
app.register_blueprint(api, url_prefix="/api")

Order Is Predictable

Because registration happens in one place, the setup order is obvious and easy to read: config, extensions, then blueprints.

Everything in One View

The factory reads like a recipe: make the app, load config, init extensions, register blueprints, return. One glance shows the whole wiring. 👀

Endpoints Get Namespaced

Blueprint endpoints are prefixed by the blueprint name, so url_for uses blueprint.view to link across modules without clashes.

url_for("main.home")

Fresh Wiring Every Time

Each call to create_app registers blueprints onto a brand new app, so tests and prod never share route state.

The Complete Pattern

Config, extensions via init_app, and blueprints via register_blueprint, all inside the factory. That is the full application factory pattern.

Quick Check

Where should blueprints be registered in the factory pattern?

Recap

You finished the pattern: register blueprints inside create_app with deferred imports and optional prefixes. Config, extensions, blueprints, return. 🏁

常见问题解答

「在工厂中注册蓝图」课时是免费的吗？

是的 — 「在工厂中注册蓝图」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 Flask Academy 课程的其余内容，请升级到 CoddyKit PRO。 Flask Academy 课程共包含 4 节课。

「在工厂中注册蓝图」这节课中我会学到什么？

在组装应用期间连接所有蓝图你通过在浏览器中直接运行的动手代码来练习 Flask 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 Flask Academy 需要有经验吗？

无需任何先前经验。CoddyKit 上的 Flask 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。

「在工厂中注册蓝图」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 Flask Academy 课中编写并运行代码吗？

能。每节 Flask 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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