exports.adduser = function(db) { return function(req, res) { // Get our form values. These rely on the "name" attributes var userName = req.body.username; var userEmail = req.body.useremail; // Set our collection var collection = db.get('users'); // Submit to the DB collection.insert({ "username": userName, "email": userEmail }, function(err, doc) { if (err) { res.send("There was a problem adding the information to the database."); } else { // If it worked, set the header so the address bar doesn't still say /adduser res.location("userlist"); res.redirect("userlist"); } }); } }

插入函数如上，我提交表单之后，查看数据库中是有数据的。但是会打印处if (err)的错误信息？这是什么原因造成的，我如果把res.location("userlist");res.redirect("userlist");移到if err里会报错，不会跳转