[英]Flask : BuildError
@app.route('/sign/<error>')
def sign(error=''):
return render_template('sign.html',er=error)
@app.route('/process', methods=['POST','GET'])
def process():
ch = request.form['box']
if ch == 'ok':
name = request.form['name']
comment = request.form['comment']
signature = Comments(name=name, comment=comment)
db.session.add(signature)
db.session.commit()
return redirect(url_for('index'))
else :
er='please check'
return redirect(url_for('sign',error=er))
sign.html have this line of code sign.html有这行代码
<div style="color: red;">{{er}}</div>this is a picture for what i get BuildError: Could not build url for endpoint 'sign'.
回溯的底部被切除,但是看起来在index.html模板中,您正在为sign
路由调用url_for
,而未指定error
的值。
Error occurred because /sign/error, error is none. 发生错误,因为/ sign / error,错误为none。 Either you can try changing
def sign(error='')
to def sign(error)
, or change er='please check'
to 'pleasecheck'(that doesn't contain blank) 您可以尝试将
def sign(error='')
更改为def sign(error)
,或将er='please check'
更改为'pleasecheck'(不包含空白)
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