背景：我正在制作遵循REST约定的节点应用。它是一个简单的应用程序，允许经过身份验证的用户发布猫的图片，这些图片显示在索引页面上。
问题：当用户点击按钮添加新猫时，此代码会运行：
router.get('/cats/new', isAuthenticated, function(req,res) {
console.log('went to /cats/new');
res.render('new', {user: req.user});
});
但是，用户永远不会访问new页面，因为此代码也会运行：
router.get('/cats/:id', function(req,res) {
var id = req.params.id;
Cat.findById(id).populate('comments').exec(function(err, cat) {
if (err) {
console.log('entering get /cats/:id');
console.log(err);
} else {
console.log('no errror yet');
console.log(cat.comments);
res.render('show', {cat:cat});
}
});
});
我不明白为什么会这样，我看着负责渲染new的按钮，看起来很好; <a class="btn btn-primary" href="/cats/new">Add new cat</a>。
如果我将router.get('/cats/new..')更改为cat/new，则此错误会消失。
当我尝试编辑有关猫的详细信息时，会发生同样的事情。以下路线应该运行并将用户重定向到user页面：
router.put('/cats/:id', function(req,res) {
console.log('beginning /cat/:id');
Cat.findByIdAndUpdate(
req.params.id, req.body.cat, function(err, updatedCat) {
if (err) {
console.log(err);
} else {
console.log('------------ req.body.cat');
console.log(req.body.cat);
console.log('------------ updated cat');
console.log('updated cat');
res.redirect('user');
console.log('not redirecting');
}
});
});
但是，用户返回router.get('/cats/:id..)。事实上，我的控制台打印not redirecting。
要使用put和delete请求，我使用的是method-override。
我发布以下/cats/的整个路线文件：
var express = require('express');
var router = express.Router();
var User = require('../models/user.js');
var Cat = require('../models/cat.js');
var Comment = require('../models/comment.js');
//middleware
function isAuthenticated(req,res,next) {
req.isAuthenticated() ? next() : res.redirect('/login');
}
router.get("/", function(req,res) {
res.redirect("cats");
});
router.get('/cats', function(req,res) {
Cat.find({}, function(err, cats) {
if (err) {
console.log(err);
} else {
res.render('cats', {cats: cats});
}
});
});
router.get('/cats/new', isAuthenticated, function(req,res) {
console.log('went to /cats/new');
res.render('new', {user: req.user});
});
router.post('/cats', isAuthenticated, function(req,res) {
console.log('went to post /cats');
var name = req.body.name;
var image = req.body.url;
var owner = req.user.username
var description = req.body.description;
cat = new Cat({
name: name,
image: image,
owner: owner,
description: description
});
cat.save();
User.findById(req.user._id, function(err, user) {
if (err) {
console.log(err);
} else {
user.cats.push(cat);
user.save();
}
})
res.redirect('cats');
});
router.get('/cats/:id', function(req,res) {
var id = req.params.id;
Cat.findById(id).populate('comments').exec(function(err, cat) {
if (err) {
console.log('entering get /cats/:id');
console.log(err);
} else {
console.log('no errror yet');
console.log(cat.comments);
res.render('show', {cat:cat});
}
});
});
router.post('/cats/:id', isAuthenticated, function(req,res) {
console.log(isAuthenticated);
var id = req.params.id;
Cat.findById(id, function(err, cat) {
console.log('findById running');
if (err) {
console.log(err);
console.log('err finding cat');
res.redirect('/cats');
} else {
console.log('before Comment.create');
Comment.create(req.body.comment, function(err, comment) {
console.log('after Comment.create');
if (err) {
console.log(err);
} else {
console.log('right after 2nd else');
comment.author.id = req.user._id;
console.log(req.user._id);
console.log(req.user.username);
comment.author.username = req.user.username;
comment.cat = id;
comment.save();
console.log('after saving comment');
cat.comments.push(comment);
cat.save();
console.log('saved cat');
User.findById(req.user._id, function(err, user) {
if (err) {
console.log(err);
} else {
user.comments.push(comment);
user.save();
console.log('saved user');
}
});
console.log(comment);
res.redirect("/cats/" + cat._id);
}
});
}
});
});
router.get('/cats/:id/edit', function(req,res) {
var id = req.params.id;
Cat.findById(id, function(err, cat) {
if (err) {
console.log(err);
} else {
res.render('edit.ejs', {cat:cat});
}
});
});
router.put('/cats/:id', function(req,res) {
console.log('beginning /cat/:id');
Cat.findByIdAndUpdate(
req.params.id, req.body.cat, function(err, updatedCat) {
if (err) {
console.log(err);
} else {
console.log('------------ req.body.cat');
console.log(req.body.cat);
console.log('------------ updated cat');
console.log('updated cat');
res.redirect('user');
console.log('not redirecting?');
}
});
});
module.exports = router;