Sails.js Can't set headers after they are sent

问题

I am using sailsjs v0.10.5.

I am trying to redirect to login after verifying user email and update the database before redirect.

I am using redirection in my update callback. But it sending the error after updating the database

'Cant send headers after they are sent'. 

The following is the code am using for redirection:

verifyEmail: function(req, res){
var userId = req.param('userId');
User.update({id: userId},{isVerified: true}).exec(function(err, user) {
  if (!err) { 
      req.flash('error', 'Your email is verified please login');
      res.redirect('/login'); }else { return res.send(user, 400); }
  });

回答1:

Update waterline function is asynchronous, are you sure there isnt some res method later in the scope that may be fired before?

回答2:

Its recommended to use return res.* for so-called "terminal methods" see http://sailsjs.org/#/documentation/reference/res/res.forbidden.html?q=notes

来源：https://stackoverflow.com/questions/26424515/sails-js-cant-set-headers-after-they-are-sent