js.And我在express.js中创建了一个简单的博客。 我使用Typicode/lowdb as database来创建/更新/删除基于data.json文件上的id的帖子。并使用json数组中的slug数据创建/更新/删除带有节点的markdown帖子.js文件系统API 。在降价帖子的删除方上,我收到了一条我不明白的错误。
{ [Error: ENOENT, unlink 'C:\Users\path\to\publicfolder\undefined.md']
errno: -4058,
code: 'ENOENT',
path: 'C:\\Users\\path\\to\\publicfolder\\undefined.md' }
我使用 fs.unlink 这样删除降价帖子:
var oldSlug = "public/"+req.params.slug+".md";
fs.unlink(oldSlug, function(err) {
if(err) {
console.log(err);
} else {
console.log("Deleted the old markdown file: " + oldSlug +"");
}
});
以下是部分公开的代码示例:
创建/更新/删除帖子的示例 - Post.js
exports.index = function (req, res) {
res.render('post/index', { posts: db.list()});
};
exports.form = function (req, res) {
res.render('post/form');
};
exports.edit = function (req, res) {
var post = db.getById(req.params.id);
res.render('post/edit', {post: post})
}
exports.update = function (req, res) {
var slugTitle = slug(req.body.name).toLowerCase().split('.').join("");
var description = req.body.desc;
db.update({id: req.body.id, name: req.body.name, desc: req.body.desc,
slug: slugTitle});
//using this to rename and update markdown posts it work's
var oldPath = "public/"+req.body.slug+".md";
var newPath = "public/"+slugTitle+".md";
fs.unlink(oldPath, function(err) {
if(err) {
console.log(err);
} else {
console.log("Deleted the old markdown file : oldPath ");
}
});
fs.writeFile(newPath, description, function(err) {
if(err) {
console.log(err);
} else {
console.log("The post was updated as: newPath ");
}
});
res.redirect('/post');};
exports.remove = function (req, res) {
db.remove(req.params.id);
//using this to delete markdown posts i get the error
//changing req.params.slug to req.body.slug still gives the error
var oldSlug = "public/"+req.params.slug+".md";
fs.unlink(oldSlug, function(err) {
if(err) {
console.log(err);
} else {
console.log("Deleted the markdown file: " + oldSlug +"");
}
});
res.redirect('/post');};
Server.js上的示例
app.get('/post', post.index);
app.get('/post/create', post.form);
app.post('/post/create', post.save);
app.get('/post/details/:id', post.details);
app.get('/post/edit/:id', post.edit);
app.post('/post/update', post.update);
app.get('/post/delete/:id', post.remove);
http.createServer(app).listen(app.get('port'), function(){
console.log("Express server listening on port " + app.get('port'));
});
index.jade示例
doctype
html
head
title
body
h1 Posts
ul
each item in posts
li Item #{item.name} - #{item.desc} - #{item.slug}
a(href='/post/details/#{item.id}') Details -
a(href='/post/edit/#{item.id}') Edit -
a(href='/post/delete/#{item.id}') Delete
div
p
a(href='post/create') Add new
问题在于post.js文件中的exports.remove函数,但为什么?我相信我正在识别要删除的markdown文件,该文件对应于数据库中文档中的Slug参数或不是吗?我希望我能在代码中理解。
答案 0 :(得分:0)
问题是您没有将变量slug
传递到remove
路线的任何位置。由于您使用的是GET,因此它不能来自req.body,因此您必须将其传递给URL路径或作为查询字符串。
尝试更改这些行:
post.js
var oldSlug = "public/"+req.query.slug+".md";
index.jade
a(href='/post/delete/#{item.id}?slug=#{item.slug}') Delete