小编Dar*_*vey的帖子

我找到了以下查询并欣赏它,如果有人可以帮我解释这意味着什么.

select * from table1, table2

ReferenceError：代码中未定义错误：

app.post('/register', function(req, res) {
  var hash = bcrypt.hashSync(req.body.password, bcrypt.genSaltSync(10));
  var user = new User({
    firstName: req.body.firstName,
    lastName: req.body.lastName,
    email: req.body.email,
    password: hash,
  });
  user.save(function(err) {
    if (err) {
      var err = 'Something bad happened, try again!';
      if(err.code === 11000) {
        error = 'That email is already taken, try another.';
      }
      res.render('register.jade', { error: error });
    } else {
      res.redirect('/dashboard');
    }
  });
});

具体来说，我认为错误就在这一行：

  res.render('register.jade', { error: error });

谁能告诉我如何解决这个问题。我以为我在输入时定义了它：

  if(err.code === 11000) {
        error = 'That email is already …