I have a problem while using jinja2
url_for()
function.
I have a route like this:
@app.route('/article/<int:article_id>/<url_title>/', methods=['GET'])
def article_page(article_id, url_title):
article = Article.query.get(article_id)
if article == None:
abort(404)
return render_template('article.html', article=article)
in jinja template file,i want to create a url which links to article_page,so i write like this:
<h5>
<a href="{{ url_for('article_page',article_id=article.id,url_title=article.url_title) }}">{{ article.title }}</a>
</h5>
but when I run this page, I get a error:
raise BuildError(endpoint, values, method)
BuildError: ('article_page', {'article_id': 1}, None)
It seems like that the second parameter url_title
missing.
How can I use url_for()
with multiple parameters correctly?
According to url_for
documentation:
If the value of a query argument is None, the whole pair is skipped.
Make sure that url_title
is not None
.
Or specify default value for url_title
in the article_page
function.
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