回答編集履歴
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[https://flask.palletsprojects.com/en/2.0.x/blueprints/#building-urls](https://flask.palletsprojects.com/en/2.0.x/blueprints/#building-urls)
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----
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application.html
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```html
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<!DOCTYPE html>
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<html lang="ja">
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<head>
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<meta charset="UTF-8">
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<title>{{title}}</title>
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</head>
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<body>
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{% block body %}
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{% endblock %}
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</body>
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</html>
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```
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index.html
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```html
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{% extends 'application.html' %}
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{% block body %}
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{% include 'nav.html' %}
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{% endblock %}
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```
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nav.html
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```html
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<nav id="admin_nav">
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<h1>
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</h1>
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<ul class="admin_nav">
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<li class="admin_nav_home">
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<a href="{{ url_for('views.home') }}">Home</a>
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</li>
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</ul>
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</nav>
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```
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app.py
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```python
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from flask import Flask
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from views import skip_view
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app = Flask(__name__)
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app.register_blueprint(skip_view.app)
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if __name__ == "__main__":
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app.run(debug=True)
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```
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skip_view.py
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```python
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from flask import Blueprint, render_template
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# Blueprintのオブジェクトを生成する
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app = Blueprint('views', __name__)
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@app.route('/')
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def home():
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title = "管理画面"
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return render_template('index.html', title=title)
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````
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で実行を確認できました。
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nav.html
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```html
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<a href="{{ url_for('.home') }}">Home</a>
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```
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でも動きます。
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nav.html
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```html
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<a href="{{ url_for('home') }}">Home</a>
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```
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で`werkzeug.routing.BuildError: Could not build url for endpoint 'home'. Did you mean 'views.home' instead?`が再現できます。
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