我是Node js的新手，并尝试创建一个博客系统。当我试图在categories.js文件中控制发布的值时，我得到了值＆＃34; undefined＆＃34;。我使用post.js添加新帖子和category.js来添加新类别。
这是我的app.js文件。
var createError = require('http-errors');
var express = require('express');
var expressValidator = require('express-validator');
var path = require('path');
var cookieParser = require('cookie-parser');
var session = require('express-session');
var multer = require('multer');
var upload = multer({dest: './public/images/uploads'});
var flash = require('connect-flash');
var logger = require('morgan');
var mongodb = require('mongodb');
var db = require('monk')('localhost/nodeblog');
var indexRouter = require('./routes/index');
var posts = require('./routes/posts');
var categ = require('./routes/categories');
var app = express();
app.locals.moment = require('moment');
// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'jade');
app.use(logger('dev'));
app.use(express.json());
app.use(express.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));
// Session
app.use(session({
secret: 'secret',
resave: true,
saveUninitialized: true
}));
// Validator
app.use(expressValidator({
errorFormatter: function(param, msg, value) {
var namespace = param.split('.')
, root = namespace.shift()
, formParam = root;
while(namespace.length) {
formParam += '[' + namespace.shift() + ']';
}
return {
param: formParam,
msg: msg,
value: value
};
}
}));
// Connect Flash
app.use(require('connect-flash')());
app.use(flash());
app.use(function (req, res, next) {
res.locals.messages = require('express-messages')(req, res);
next();
});
// Make our db accessible to our router
app.use(function(req, res, next) {
req.db = db;
next();
});
app.use('/', indexRouter);
app.use('/posts', posts);
app.use('/categories', categ);
// catch 404 and forward to error handler
app.use(function(req, res, next) {
next(createError(404));
});
// error handler
app.use(function(err, req, res, next) {
// set locals, only providing error in development
res.locals.message = err.message;
res.locals.error = req.app.get('env') === 'development' ? err : {};
// render the error page
res.status(err.status || 500);
res.render('error');
});
module.exports = app;
这是我的post.js文件
var express = require('express');
var router = express.Router();
var mongodb = require('mongodb');
var multer = require('multer');
var upload = multer({dest: './public/images/uploads'});
var db = require('monk')('localhost/nodeblog');
router.get('/add', function(req, res, next) {
var categories = db.get('categories');
categories.find({}, {}, function(err, categories) {
res.render('addpost', {
"title" : "Add Post",
"categories": categories
});
});
});
router.post('/add', upload.single('profileimage'), function(req, res, next) {
// Getting Form Values
var title = req.body.title;
console.log(title);
var category = req.body.category;
var body = req.body.body;
var author = req.body.author;
var date = new Date();
if(req.file) {
var profileimage = req.file.filename;
} else {
var profileimage = 'noimage.png';
}
// Form Validation
req.checkBody('title', 'Title Field is required').notEmpty();
req.checkBody('body', 'Body field is required').notEmpty();
// Check for Errors
var errors = req.validationErrors();
if(errors) {
res.render('addpost', {
"errors": errors,
"title": title,
"body": body
});
} else {
var posts = db.get('posts');
// Submitting values to DB
posts.insert({
"title": title,
"body": body,
"category": category,
"date": date,
"author": author,
"profileimage": profileimage
}, function(err, post) {
if(err) {
res.send("There is an issue in submitting the post");
} else {
req.flash('success','Post Submitted Successfully');
res.location('/');
res.redirect('/');
}
});
}
});
module.exports = router;
这是我的分类文件。
var express = require('express');
var router = express.Router();
router.get('/add', function(req, res, next) {
res.render('addcategory', {
"title" : "Add Category"
});
});
router.post('/add', function(req, res, next) {
// Getting Form Values
var title = req.body.title;
//console.log(req.body);
console.log(title);
});
module.exports = router;
这是addcategory jade文件。
extends layout
block content
h1=title
ul.errors
if errors
each error, i in errors
li.alert.alert-danger #{error.msg}
form(method='post', action='/categories/add', enctype='multipart/form-data')
.form-group
label Title:
input.form-control(name='title',type='text')
input.btn.btn-default(name='submit',type='submit',value='Save')
这是post jade文件。
扩展布局
block content
h1=title
ul.errors
if errors
each error, i in errors
li.alert.alert-danger #{error.msg}
form(method='post', action='/posts/add', enctype='multipart/form-data')
.form-group
label Title:
input.form-control(name='title', type='text')
.form-group
label Category
select.form-control(name='category')
each category, i in categories
option(value= '#{category.title}') #{category.title}
.form-group
label Body
textarea.form-control(name='body', id='body')
.form-group
label Main Image
input.form-control(name='profileimage', type='file')
.form-group
label Author
select.form-control(name='author')
option(value='Deepesh') Deepesh
option(value='Sudha') Sudha
input.btn.btn-default(name='submit', type='submit', value='Save')
script(src='/ckeditor/ckeditor.js')
script
| CKEDITOR.replace('body');
我在post.js中获得req.body值。但是当我试图在categories.js中获得相同时，我得到的值是未定义的。我需要在类别文件中获取title的值，其中相同的值应该在post文件中。
你们能找到我同样的解决方案吗？我尝试过，但没有得到适当的解决方案。
答案 0 :(得分：0)
路由是指确定应用程序如何响应客户对特定端点的请求。您为同一端点创建了2个路由器。
router.post('/add', function(req, res, next) {} //in categories.js and post js
一旦您请求数据，数据将到达指定的地址，路由器将处理并处理它。因此，您将收到对post.js的请求，express处理该请求，然后对其进行响应。这样该请求将被终止。
但是在category.js中，您正在等待已经消失的相同请求。如果您想测试它，请在post.js中注释掉router.post，然后您会看到express将处理category.js中的请求。