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當我填寫表格，我得到這個錯誤，我沒有看到閃光燈的消息，儘管它把它添加到我的分貝：瓶生成錯誤
werkzeug.routing.BuildError
BuildError: ('/contacts', {}, None)
我的方法：
@app.route('/contacts/', methods=['GET','POST'])
def contact_list():
cur = g.db.execute('select contact_id, surname, firstname from address order by surname')
contacts = cur.fetchall()
return render_template("contacts.html", contacts = contacts) #refer to template
@app.route('/addcontact/', methods=['GET','POST'])
def contact_add():
if request.method == 'POST':
g.db.execute('insert into address (surname, firstname, email, mobile) values (?, ?, ?, ?)',
[request.form['firstname'], request.form['surname'], request.form['email']
, request.form['mobile']])
g.db.commit()
flash('New entry was successfully posted')
return redirect(url_for('/contacts')) #redirect to the contacts page
elif request.method != 'POST':
return render_template('addcontact.html')
我的HTML ：
<html>
<body>
<h1>Add new contact</h1>
<form action='/addcontact/' method="post">
<dl>
<dt>First Name:
<dd><input type="text" size=30 name="firstname">
<dt>Surname:
<dd><input type="text" size=30 name="surname">
<dt>Email:
<dd><input type="text" size=30 name="email">
<dt>Mobile:
<dd><input type="text" size=30 name="mobile">
<dd><input type="submit" value="Add New Contact">
</dl>
</form>
<a href="/">Home</a>
<a href="/contact">List of contacts</a>