[英]How to redirect user to a different path on the same domain with a click of a button in express?
[英]Express APP how to redirect user to /:id path from server side
我正在学习 Node.js 并且发现将用户重定向到 an:id 路径时遇到了一些麻烦。 我想在那里打印他的用户名。 因此,为了进行概述,它是一个登录页面,其中包含我要求输入别名和 email 的表单。 当用户单击提交时,我想将他移动到 /:id 路径以打印其用户名。 我的代码如下:
var express = require("express"),
app = express(),
request = require("request"),
mongoose = require("mongoose"),
bodyParser = require("body-parser");
app.set("view engine", "ejs")
app.use(express.static("public"));
app.use(bodyParser.urlencoded({extended: true}));
mongoose.connect("mongodb://localhost/Scape_Room", {useNewUrlParser: true, useUnifiedTopology: true});
var userSchema = new mongoose.Schema({
email: String,
alias: String,
});
var user = mongoose.model ("user",userSchema);
app.get("/", function(req, res){
res.render("index")
})
app.post("/newuser", function(req,res){
var name = req.body.name;
var email = req.body.email;
var newUser = {name:name, email:email}
user.create(newUser, function(err,newlyUser){
if(err){
console.log(err)
} else {
res.redirect("/start/:id")
}
})
})
app.get("/start/:id", function(req,res){
user.findById(req.params.id, function(err, foundUser){
if(err){
console.log(err)
} else{
res.render("startPoint", {user:foundUser})
}
})
})
app.listen(3000, function(err){
console.log("Server listening")
})
错误如下: { CastError: Cast to ObjectId failed for value ":id" at path "_id" for model "user"
我尝试过: - 将路径更改为:_id - 将 start/ 添加到路由中
当你使用redirect()
方法时,你必须传递一个真实的路由 url 而不是一个 id。
使用 node.js 最佳实践完成代码。
const express = require("express")
const request = require("request");
const mongoose = require("mongoose");
const bodyParser = require("body-parser");
const app = express();
app.set("view engine", "ejs")
app.use(express.static("public"));
app.use(bodyParser.urlencoded({ extended: true }));
mongoose.connect("mongodb://localhost/Scape_Room", { useNewUrlParser: true, useUnifiedTopology: true });
const userSchema = new mongoose.Schema({
email: String,
alias: String,
});
const user = mongoose.model("user", userSchema);
app.get("/", function (req, res) {
res.render("index");
});
app.post("/newuser", function (req, res) {
const { name, email } = req.body;
if (!name || !email) {
// here you must handle missing req.body. lets log console for now
console.log("Name - Email missing!");
return res.end();
}
const newUser = { name: name, email: email }
user.create(newUser, function (err, newlyUser) {
if (err) {
console.log(err);
return res.end();
}
if (!newlyUser) {
console.log("Couldn't save user!");
return res.end();
}
if (!newlyUser.id) {
console.log("No user id found");
return res.end();
}
res.redirect(`/start/${newlyUser.id}`);
});
});
app.get("/start/:id", function (req, res) {
user.findById(req.params.id, function (err, user) {
if (err) {
console.log(err);
} else {
res.render("startPoint", { user });
}
})
})
app.listen(3000, function (err) {
console.log("Server listening")
});
使用类似下面的东西
app.post("/newuser", function(req,res){
var name = req.body.name;
var email = req.body.email;
var newUser = {name:name, email:email}
user.create(newUser, function(err,newlyUser){
if(err){
console.log(err)
} else {
res.redirect(`/start/${newlyUser._id}`)
}
})
})
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