Javascript 将两个功能合并为一个条带和Passport

我现在已经设置好了，所以用户只需使用他们的电子邮件和密码即可注册。简单易行，我希望他们能够从

select

元素中选择一个计划。我知道如何使用

req.body.plan

访问请求的部分，如果选择的

name

是

plan

我目前有两个独立的控制器函数，以稍微不同的方式来实现这一点。我有它，所以

postSignup

使用passport.js为用户注册，一切都很好。我还有一个

postPlan

，当用户在

/billing

上选择一个计划，然后提交一个表单，让他们将该计划分配给他们。我一直坚持的部分是

User.findById（req.User.id，function（err，User）{

部分，更具体地说是

req.User.id

。我如何将下面的两个函数合并，以便根据注册表单中的select元素设置用户的计划

后期计划

exports.postPlan = function(req, res, next){
  var plan = req.body.plan;
  console.log("plan: ",req.body.plan);
  var stripeToken = null;

  if(plan){
    plan = plan.toLowerCase();
  }

  if(req.user.stripe.plan == plan){
    req.flash('info', {msg: 'The selected plan is the same as the current plan.'});
    return res.redirect(req.redirect.success);
  }

  if(req.body.stripeToken){
    stripeToken = req.body.stripeToken;
  }

  if(!req.user.stripe.last4 && !req.body.stripeToken){

    req.flash('errors', {msg: 'Please add a card to your account before choosing a plan.'});
    return res.redirect(req.redirect.failure);
  }

  User.findById(req.user.id, function(err, user) {
    if (err) return next(err);

    user.setPlan(plan, stripeToken, function (err) {
      var msg;

      if (err) {
        if(err.code && err.code == 'card_declined'){
          msg = 'Your card was declined. Please provide a valid card.';
        } else if(err && err.message) {
          msg = err.message;
        } else {
          msg = 'An unexpected error occurred.';
        }

        req.flash('errors', { msg:  msg});
        return res.redirect(req.redirect.failure);
      }
      req.flash('success', { msg: 'Plan has been updated.' });
      res.redirect(req.redirect.success);
    });
  });
};

注册后

    exports.postSignup = function(req, res, next){
      req.assert('email', 'Please sign up with a valid email.').isEmail();
      req.assert('password', 'Password must be at least 6 characters long').len(6);

      var errors = req.validationErrors();

      if (errors) {
        req.flash('errors', errors);
        req.flash('form', {
          email: req.body.email
        });
        return res.redirect('/signup');
      }
      // calls next middleware to authenticate with passport
      passport.authenticate('signup', {
        successRedirect: '/dashboard', // Select redirect for post signup
        failureRedirect: '/signup',
        failureFlash : true
      })(req, res, next);
        next();
    };

当前想法

    exports.postSignup = function(req, res, next){
  req.assert('email', 'Please sign up with a valid email.').isEmail();
  req.assert('password', 'Password must be at least 6 characters long').len(6);

  var errors = req.validationErrors();

  if (errors) {
    req.flash('errors', errors);
    req.flash('form', {
      email: req.body.email
    });
    return res.redirect('/signup');
  }
  // calls next middleware to authenticate with passport
  passport.authenticate('signup', {
    successRedirect: '/dashboard', // Select redirect for post signup
    failureRedirect: '/signup',
    failureFlash : true
  });
  // var plan = req.body.plan;
  var plan = 'silver';
  var stripeToken = null;
  if(req.body.stripeToken){
    stripeToken = req.body.stripeToken;
  }
  User.findById({"email":req.body.email}, function(err, user) {
    if (err) return next(err);
    console.log("Ran here");
    user.setPlan(plan, stripeToken, function (err) {
      var msg;
      if (err) {
        if(err && err.message) {
          msg = err.message;
        } else {
          msg = 'An unexpected error occurred.';
        }
        req.flash('errors', { msg:  msg});
        return res.redirect(req.redirect.failure);
      }
      req.flash('success', { msg: 'Thanks for signing up! ' });
      res.redirect(req.redirect.success);
    });
  });

  (req, res, next);
    next();
};

上述当前尝试的错误消息

{
  "message": "Cast to ObjectId failed for value \"{ email: 'snappierjaguar@gmail.com' }\" at path \"_id\" for model \"User\"",
  "error": {
    "message": "Cast to ObjectId failed for value \"{ email: 'snappierjaguar@gmail.com' }\" at path \"_id\" for model \"User\"",
    "name": "CastError",
    "stringValue": "\"{ email: 'snappierjaguar@gmail.com' }\"",
    "kind": "ObjectId",
    "value": {
      "email": "snappierjaguar@gmail.com"
    },
    "path": "_id"
  }
}