我正在使用 MEAN 堆栈开发一个简单的自定义 CMS。这是我有史以来的第一个网络应用程序，我正在使用它来学习绳索，就像它一样。不幸的是，我无法从 mongodb 访问数据。mongodb 服务正在运行，当我通过 db.news.find() 查看数据时，数据就在那里（我从 mongo shell 将两个新闻文档插入到“新闻”集合中）。我使用“db.news.insert(var)”添加了示例数据（两个文档），因为 .
所以我需要的是能够从数据库中获取新闻数据，并将其发送到 angular.js 客户端，然后它将在每条路线上的固定框中显示它。然后，当然，我需要能够在 Angular 客户端中编辑数据，将其发送回服务器并将其保存到数据库中。很基本的东西。我知道我的角度代码工作正常，因为当我使用实际对象并将其绑定到范围时，我可以访问并查看数据。以下是我尝试从 Angular 访问数据库的方法：我在代码中添加了注释，描述了我遇到的所有问题。请注意标记为 <- 和 ^- 的内容。干杯
angular.module('App', ['ngResource'])
.controller('NewsCtrl', function($scope, $resource){
var News = $resource('/');
var news = News.query();
console.log(news);
// ^- No news logged in the console - sometimes I am getting an empty array,
// sometimes an 'undefined' and asometimes an array of approx. 2761 elements
// where each is a single character. Characters form patterns like this -
// [{"0":"<"},{"0":"!"},{"0":"D"},{"0":"O"},{"0":"C"},{"0":"T"},{"0":"Y"},
// {"0":"P"},{"0":"E"},{"0":" "},{"0":"h"},{"0":"t"},{"0":"m"},{"0":"l"},
// {"0":">"},...]
// When all the characters are assembled they form '<!DOCTYPE html>' -
// hmm... somewhat sounds familiar, but not what I expected.
// The whole array appears to be the HTML of the very website encoded
// in an array of objects character by character.
$scope.news = news; // <- No data available in the scope, or displays the same array mentioned above.
// $scope.news = news[0]; // <- No data available in the scope, or displays the same array mentioned above.
// $scope.news = { // <- This puts the data in the scope just fine.
// headline: "Huseyin Ozer at Wimbledon",
// bd: "Wimbledon Championships arranged between 24th of June – 7th of July. I followed all the finals with pleasure. In women final Bartoli won the prize but Lisicki won everybody’ s heart with her outgoingness. With Andy Murray I shared the pride of British people.",
// imgURI: encodeURI("images/news/wimbledon.jpg"),
// imgThumbURI: encodeURI("images/news/thumbs/wimbledon.jpg"),
// imgCaption: "Wimbledon finals were amazing. I am sharing the pride of British people.",
// addedOn: new Date(),
// addedBy: "Admin"
// }
});
这是我的网络服务器的代码：
/**
* Module dependencies.
*/
var express = require('express')
, routes = require('./routes')
, user = require('./routes/user')
, http = require('http')
, path = require('path')
, fs = require('fs');
// Defining connection to the database:
var mongoose = require('mongoose').
connect("mongodb://localhost:27017/huseyin-ozer"),
db = mongoose.connection;
var Schema = mongoose.Schema;
var ObjectID = Schema.ObjectId;
// Setting up the debug flag:
mongoose.set('debug, true');
// Logging connection:
db
.on('error', console.error.bind(console, 'DB connection error.'))
.once('open', console.log.bind(console, 'DB Connection established.'));
// Defining MongoDB schemas:
var husOzSchema = new Schema({
});
var usr = new Schema({
first: String,
last: String
});
var newsSchema = new Schema({
headline: String,
bd: String,
imgURI: String,
imgThumbURI: String,
imgCaption: String,
addedOn: Date,
addedBy: {
type: ObjectID,
ref: 'usr'
}
// {first: String,
// last: String}
});
// On user action 'save' populate the addedOn and addedBy fields before the news article is actually saved to the DB:
newsSchema.pre('save', function(next){
if( !this.addedOn ) this.addedOn = new Date();
if( !this.addedBy ) this.addedBy = {first: "admin", last: "admin"};
});
// Indexing important fields:
usr.index({last: 1});
newsSchema.index({headline: 1});
//Adding the News model:
var News = mongoose.model('News', newsSchema);
//Creating and saving some test data to MongoDB:
//var nws1 = new News({
// headline: "Huseyin Ozer at Wimbledon",
// bd: "Wimbledon Championships arranged between 24th of June – 7th of July. I followed all the finals with pleasure. In women final Bartoli won the prize but Lisicki won everybody’ s heart with her outgoingness. With Andy Murray I shared the pride of British people.",
// imgURI: encodeURI("images/news/wimbledon.jpg"),
// imgThumbURI: encodeURI("images/news/thumbs/wimbledon.jpg"),
// imgCaption: "Wimbledon finals were amazing. I am sharing the pride of British people.",
// addedOn: new Date(),
// addedBy: "Admin"
//});
//var nws2 = new News({
// headline: "David Miliband’s Goodbye Party",
// bd: "David Miliband choose his favourite restaurant from many alternatives. His goodbye party was held at OZER Restaurant before he will go to New York. On that night many of Labour Party deputies signed the book called ’ The History of Labour Party’ as a gift for Mr. Ozer.",
// imgURI: encodeURI("images/news/DMGoodbye.jpg"),
// imgThumbURI: encodeURI("images/news/thumbs/DMGoodbye.jpg"),
// imgCaption: "Farewell party at Ozer.",
// addedOn: new Date(),
// addedBy: "Admin"
// });
// For some reason upon running the server, the data is not stored in the DB using the code below. Why is that?
//nws1.save(function(err, news){
// if(err) return console.error("Error while saving data to MongoDB: " + err);
// ^- no error displayed in the console. All ok?...
// console.dir(news); // <- ... not really. No data displayed in the console either.
// });
//nws2.save(function(err, news){ // <- same as above
// if(err) return console.error("Error while saving data to MongoDB: " + err);
// console.dir(news);
// });
var app = express();
// all environments
app.set('port', process.env.PORT || 3000);
app.set('views', path.resolve(__dirname + '/public'));
app.set('view engine', 'html')
.engine('html', function(path, options, fn){
if('finction' == typeof options){
fn = options, options = {};
}
fs.readFile(path, 'utf8', fn);
});
app.use(express.favicon());
app.use(express.logger('dev'));
app.use(express.bodyParser());
app.use(express.methodOverride());
app.use(express.cookieParser('your secret here'));
app.use(express.session());
//app.use(app.router); // <- When I uncomment this the website doesn't render at all. all I see is a couple of square brackets - '[]'
app.use(express.static(path.join(__dirname, 'public'))); <- when I move this below the routes defined below, I am also getting a blank page with a pair of square brackets - '[]'
app.get('/', function(req, res, next){
News.
find().
exec(function(err, nws){
if(err) return next(err);
res.send(nws);
// res.render(nws);
});
res.render('index', { title: 'static Express' });
});
app.get('/users', user.list);
app.get('*', function(req, res){
res.render('index.html', {layout: null})
})
// development only
if ('development' == app.get('env')) {
app.use(express.errorHandler());
}
http.createServer(app).listen(app.get('port'), function(){
console.log('Express server listening on port ' + app.get('port'));
});
我非常感谢您的帮助。问候，贾里德