带有 Flask 的 AJAX POST 请求返回方法不允许错误

如何解决带有 Flask 的 AJAX POST 请求返回方法不允许错误

我最近开始学习 Flask。我正在尝试构建一个简单的注册表单，但出现 Method not allowed 错误。我花了一些时间在这里和谷歌上阅读解决方案，但没有任何成功。我希望有人能帮我解决这个问题。

      <form method="POST" id="registerform">
        <div class="form-group">
          <small><label for="email">Email address</label></small>
          <input type="email" class="form-control" id="email" aria-describedby="emailHelp" placeholder="Enter email">
        </div>
        <div class="form-group">
          <label for="password">Password</label>
          <input type="password" class="form-control" id="password" placeholder="Password">
        </div>
        <div class="form-group">
          <label for="password2">Repeat Password</label>
          <input type="password" class="form-control" id="password2" placeholder="Repeat Password">
        </div>
        <button type="submit" class="btn btn-primary">Register</button>
      </form>
    </div>
    <div class="col"></div>
  </div>
</div>

$(document).ready(function() {
  $("#registerform").on('submit',function(e) {
    e.preventDefault();
    
    $.ajax({
      method: "POST",url: "/register",dataType: "html",data: $("#registerform").serialize(),success: function(data) {
        if (data == 'Registration succesful,please check your mail to activate account') {
          $('#msg').html('<div class="alert alert-success" role="alert" id="msg2">' + data + '</div>');
        } else {
          $('#msg').html('<div class="alert alert-success" role="alert" id="msg2">' + data + '</div>');
        }
      }
    });
  });
});

@app.route('/register',methods =['GET','POST']) 
def register(): 
    msg = '' 
    if request.method == 'POST' and 'password' in request.form and 'email' in request.form and 'password2' in request.form: 
        password = request.form['password']
        password2 = request.form['password2'] 
        email = request.form['email'] 

        #sql QUEIRES AND OTHER STUFFS HERE#

        msg = 'Registration succesful,please check your mail to activate account.'
    else: 
        msg = 'Please fill out the form !'
    
    return msg

先谢谢你！