如果你有一个像这样的服务器js:
var app = require('express'),
http = require('http'),
news = require('./server/api/news'),
db = require('mongoose');
/* app config..... */
app.get('/api/news', news.list);
var server = http.createServer(app);
server.listen(app.get('port'), function () {
console.log("Server running");
});
我想创建一个API来处理向数据库添加新闻项目:
var db = require('mongoose');
/*** Public Interfaces ***/
function list(req, res) {
var offset = ~~req.query.offset || 0,
limit = ~~req.query.limit || 25;
db.News.find(function (err, newsItems) {
res.json(newsItems.slice(offset*limit, offset*limit + limit));
});
}
exports.list = list;
此API将存在于自己的文件中,如何使用新模块中db
内创建的server.js
实例。
或者每次查询数据库时是否创建并打开新连接?
由于
答案 0 :(得分:1)
我可能会更喜欢这样做
服务器:
var express = require('express'),
app = express(),
http = require('http'),
db = require('mongoose'),
news = require('./server/api/news')(db); // you can pass anything as args
app.get('/api/news', news.list);
/* add routes here, or use a file for the routes */
// app.get('/api/morenews', news.more_news); .... etc
http.createServer(app).listen(8000);
并且在../news/index.js
文件或您正在使用的任何文件中,我都会使用文字,但您也可以使用导出来传回每个方法
module.exports = function(db) {
/* now db is always accessible within this scope */
return {
list : function (req, res) {
var offset = ~~req.query.offset || 0,
limit = ~~req.query.limit || 25;
db.News.find(function (err, newsItems) {
res.json(newsItems.slice(offset*limit, offset*limit + limit));
});
}, // now you can easily add more properties
more_news : function(req, res) {
res.end('Hello kitty');
}
}
}