如何使用Flask蓝图修复端点错误 [英] How do I fix an endpoint error with flask blueprints
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问题描述
我正在学习带有蓝图的烧瓶,并且我有以下代码示例:
I am learning flask with blueprints and I have the following code example:
from flask import Flask, render_template, Blueprint, g
bp = Blueprint('language', __name__, url_prefix='/<int:language_id>', static_folder='static')
app = Flask(__name__)
@bp.url_defaults
def add_language_id(endpoint, values):
if 'language_id' in g:
values.setdefault('language_id', g.site_id)
else:
g.language_id = 1 # English
@bp.url_value_preprocessor
def pull_language_id(endpoint, values):
g.language_id = values.pop('language_id')
@bp.route('/')
def index():
return render_template('main.html')
@bp.route('/lang')
def language():
return render_template('lang.html')
app.register_blueprint(bp)
if __name__ == '__main__':
app.run()
但是我遇到了这个错误:
But I'm getting this error:
werkzeug.routing.BuildError:无法为端点建立URL值['language_id']的语言".您的意思是"language.index"代替?
werkzeug.routing.BuildError: Could not build url for endpoint 'language' with values ['language_id']. Did you mean 'language.index' instead?
这是HTML代码:
<ul>
<li>
<a href="{{ url_for('language', language_id=1) }}">English</a>
</li>
</ul>
如何纠正此错误?
推荐答案
好像您在URL链接中缺少蓝图名称(语言
):
Looks like you are missing the Blueprint name (language
) in your url link:
从这里:
bp = Blueprint('language', __name__, url_prefix='/<int:language_id>', static_folder='static')
因此,您的链接将需要附加:
So your link will need to be appended:
<a href="{{ url_for('language.language', language_id=1) }}">English</a>
我还建议给它命名不同的名称,以免与您可能具有的任何其他命名约定冲突.
I would also suggest naming it something different so it doesn't conflict with any other naming convention you might have.
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