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我想知道为什么在标签中未定义req.session.username >>> DOESNT WORK < < <虽然它在标签中工作>>>这是可行的< < <。我带了req作为我的模块的参数，但似乎我应该做别的事情？该/ AJAX路线通过Ajax调用访问，它并设置会话变量>>>这并不工作< < <in node.js with express req.session在我的require（）模块中是undefined
//index.js file
var express = require('express');
var router = express.Router();
var app = express();
var functions = require('../public/javascripts/functions.js');
router.post('/ajax', function(req, res , next){
var username = req.param("username");
var password = req.param("password");
var operation = req.param("operation");
else if (operation === "validate")
{
async.series([
function()
{
functions.validate(username, password, req);
}
], function(err,result)
{
if (err)
return console.log(err);
console.log(result);
});
//req.session.username = "yaryar"; >>>THIS DOES WORK<<<
}
var strings = ["rad", "bla", "ska"]
console.log('body: ' + JSON.stringify(req.body));
console.log("AJAX RECEIVED");
res.send(strings);
});
module.exports = router;
functions.js文件：
module.exports = {
validate: function(username, password, req) {
var url = 'mongodb://localhost';
var MongoClient = require('mongodb').MongoClient;
var assert = require('assert');
var ObjectId = require('mongodb').ObjectID;
MongoClient.connect(url, function(err, db)
{
assert.equal(null, err);
console.log("Connected correctly to server.");
var cursor = db.collection('users').find({username : username});
cursor.each(function(err,doc,req)
{
assert.equal(err, null);
if (doc != null)
{
console.log("user found: " + doc.username);
req.session.username = "ttyy"; // >>>DOESNT WORK<<<
return true
}
else
{
console.log("user not found");
return false;
}
});
//db.close();
});
}
};