我正在尝试全局定义一些东西(下划线库、猫鼬、数据库连接,最终是权限对象)
应用程序.js
/* module dependencies */
const express = require('express');
const auth = require('http-auth');
const underscore = require('underscore');
const expressValidator = require('express-validator');
const mongo = require('mongodb');
const db = require('./library/db');
/*end module dependencies */
/*routes files*/
const post = require('./routes/post');
/* end route files */
/* start the app instance */
var app = express();
/* authentication */
var basic = auth({
authRealm : "Private area.",
authList : ['Shi:many222', 'Lota:123456']
});
/* end authentication*/
/* pass app as an argument to the use method */
app.configure(function () {
app.use(express.logger('dev'));
app.use(express.bodyParser());
app.use(expressValidator);
app.use(db);
//app.use(underscore);
/* config debugging */
app.configure('development', function(){
app.use(express.errorHandler({ dumpExceptions: true, showStack: true }));
});
/* production instance */
app.configure('production', function(){
app.use(express.errorHandler());
});
/* end config debugging */
});
/* start route management */
app.get('/post', function(req, res) {
basic.apply(req, res, function(username) {
post.use(app);
post.findAll(req, res);
});
});
app.get('/post/:id', function(req, res) {
post.findById(req, res);
});
/* port management */
var port = 8000;
app.listen(port);
console.log('Listening: port: '+port);
post.js
// Module dependencies
const underscore = require("underscore");
// placeholder for app instance
var app;
// add a use function to exports that we can access from our app
exports.use = function (appInstance) {
// make app instance available in post.js
app = appInstance;
};
/* find all rows */
exports.findAll = function(req, res) {
console.log('Post:findAll');
app.db.collection('Post', function(err, collection) {
collection.find({},{limit: 100}).toArray(function(err, items) {
res.send(exports.parseModels(items));
});
});
};
/* parse a single or all items passed to it for formatting */
exports.parseModels = function (items) {
underscore.each(items, function(key, val) {
console.log('underscore parsed an object');
});
return items;
};
数据库.js
var mongo = require('mongodb');
var Server = mongo.Server,
Db = mongo.Db,
BSON = mongo.BSONPure;
var server = new Server('localhost', 27017, {auto_reconnect: true});
var db = new Db('website', server);
db.open(function(err, db) {
if(!err) {
//do an error here
}
});
exports.db = db;
我在正确范围内获取数据库时遇到问题,目前在 post.js 中调用查询时,我收到此错误:
ost:findAll
TypeError: Cannot call method 'collection' of undefined
at Object.exports.findAll (/Github/-api-v3/routes/post.js:19:10)
at /Github/-api-v3/app.js:53:10
at Basic.apply (/Github/-api-v3/node_modules/http-auth/lib/auth/basic.js:48:4)
at /Github/-api-v3/app.js:51:9
at callbacks (/Github/-api-v3/node_modules/express/lib/router/index.js:161:37)
at param (/Github/-api-v3/node_modules/express/lib/router/index.js:135:11)
at pass (/Github/-api-v3/node_modules/express/lib/router/index.js:142:5)
at Router._dispatch (/Github/-api-v3/node_modules/express/lib/router/index.js:170:5)
at Object.router (/Github/-api-v3/node_modules/express/lib/router/index.js:33:10)
at next (/Github/-api-v3/node_modules/express/node_modules/connect/lib/proto.js:199:15)