python - models.DoesNotExist - 使用 python 烧瓶的 Web 应用程序

Question

每个人。任何人。下面是我的 models.py 文件，我在数据库中创建了一个表

class Staff(UserMixin, MongoModel):
    full_name = fields.CharField(required=True, blank=False)
    job_position = fields.CharField(required=True, blank=False)
    email = fields.EmailField(required=True, blank=False)
    password = fields.CharField(required=True, blank=False)

    def get_id(self):
        return str(self.pk)

我正在使用烧瓶登录进行登录身份验证

 login_manager = LoginManager()
 login_manager.login_view = 'login'
 login_manager.init_app(app)


 @login_manager.user_loader
 def load_user(staff_id):
     staff = Staff.objects.get({"_id": ObjectId(staff_id)})
     return staff

这是登录页面的路径

@app.route("/login", methods=['GET', 'POST'])
def login():
    form = LoginForm()

    if form.validate_on_submit():
        email = form.email.data
        password = form.email.data
        remember = form.remember.data
        staff = Staff.objects.raw({"email": email, "password": password})
        if staff.count() == 0:
            return "Invalid email or password"
        login_user(staff.first())
        remember = remember
        return redirect(url_for('dashboard'))
    return render_template("login.html", form=form)

它返回一个model.DoesNotExist，它显然存在，但我一定做错了什么