“werkzeug.routing.BuildError：无法为端点'success'构建url。您是否忘记指定值['name']？”
如何解决这个错误？我尝试了很多事情，但无法自己解决。
http_methods.py：
from flask import Flask, redirect, url_for, request
app = Flask(__name__)
@app.route('/success/<name>')
def success(name):
return 'welcome %s' % name
@app.route('/login', methods=['POST', 'GET'])
def login():
if request.method == 'POST':
user = request.form['nm']
return redirect(url_for('success', name = user))
else:
user = request.args.get('nm')
return redirect(url_for('success', name = user))
if __name__ == "__main__":
app.run(debug=True)
我在登录方法中遇到错误，未指定 ['name'] 的值；如何解决这个错误？
登录.html：
<!DOCTYPE html>
<html lang="en">
<body>
<form action="http://127.0.0.1:5000/login" method="POST">
<p>Enter name:</p>
<p><input type="text" name="nm" value="nm"/></p>
<p><input type="submit" value="submit"/></p>
</form>
</body>
</html>
输出：
File "/Users/chirag.kanzariya/pythonprojects/v_python/lib/python3.7/site-packages/flask/helpers.py", line 345, in url_for
force_external=external)
File "/Users/chirag.kanzariya/pythonprojects/v_python/lib/python3.7/site-packages/werkzeug/routing.py", line 1776, in build
raise BuildError(endpoint, values, method, self)
werkzeug.routing.BuildError: Could not build url for endpoint 'success'. Did you forget to specify values ['name']?
127.0.0.1 - - [29/Jan/2019 14:48:00] "GET /login?__debugger__=yes&cmd=resource&f=style.css HTTP/1.1" 200 -
127.0.0.1 - - [29/Jan/2019 14:48:00] "GET /login?__debugger__=yes&cmd=resource&f=jquery.js HTTP/1.1" 200 -
127.0.0.1 - - [29/Jan/2019 14:48:00] "GET /login?__debugger__=yes&cmd=resource&f=debugger.js HTTP/1.1" 200 -
127.0.0.1 - - [29/Jan/2019 14:48:00] "GET /login?__debugger__=yes&cmd=resource&f=ubuntu.ttf HTTP/1.1" 200 -
127.0.0.1 - - [29/Jan/2019 14:48:00] "GET /login?__debugger__=yes&cmd=resource&f=console.png HTTP/1.1" 200 -
127.0.0.1 - - [29/Jan/2019 14:48:00] "GET /login?__debugger__=yes&cmd=resource&f=console.png HTTP/1.1" 200 -
我现在正在使用 python 3.7 和 Flask 1.0.2 版本。
小智 6
看看这个。在您的登录功能中，我在打开登录页面时为第一个 GET 请求添加了一个 render_template。这也可能会防止您现在遇到的错误。请记住，这不包含任何错误处理，例如如果您的登录过程中未知用户会发生什么。
@app.route('/success/<name>')
def success(name):
return 'welcome %s' % name
@app.route('/login', methods=['POST', 'GET'])
def login():
if request.method == 'POST':
user = request.form['nm']
return redirect(url_for('success', name = user))
return render_template(login.html)
if __name__ == "__main__":
app.run(debug=True)