我有以下代碼:無法更改與異步,JavaScript的的NodeJS對象屬性和MongoDB
exports.home = function(Comment,User,Activity){
return function(req, res){
var get_url = req.url.split(/\?/)[1];
if (!req.user)
{
res.writeHead(302, {
'Location': '/'
});
res.end();
return;
}
var posts_id_array = req.user.posts_id_array;
var stocks_array = req.user.watch_list;
var subscribe_to_arr = req.user.subscribe_to;
User.find({_id:{$ne:req.user._id, $nin:subscribe_to_arr}}).sort('-_id').limit(10).exec(function(err_user, users){
Activity.find({$or:[{owner_id : {$in :subscribe_to_arr}},{owner_id:req.user._id}]}).sort('-time_stamp').limit(20).exec(function(err_post,activities){
if(err_post || !activities) {
res.render('home',{user:req.user,stocks:JSON.stringify(stocks_array)});
}
else
{
var funcArr = [];
var hasPost = ["publish","comment","like"];
var notPost = ["add_stock","delete_stock"];
for(var i =0;i<activities.length;i++)
{
if(hasPost.indexOf(activities[i].type)!=-1){
var fobj = {
act: activities[i],
f:function(callback){
var test = this.act;
var comments = test.post.comments;
Comment.find({_id:{$in:comments}},function(err,_comments){
console.log("test.post.comments");
//console.log(test.post.comments);
console.log("comments ");
console.log(_comments);
console.log("type");
console.log(typeof test);
console.log("cloning obj");
// obj = JSON.parse(JSON.stringify(test)); // cloning obj
console.log(test);
console.log("setting value of comments");
**console.log(test.post.comments = _comments);** //unable to change test.post.comments
console.log("after assignment");
console.log(test.post.comments); // remain unchanged but work with obj.post.comments if I clone test as obj and use obj instead.
callback(null,test);
});
}
}
funcArr.push(fobj.f.bind(fobj));
}else{
var fobj = {
act: activities[i],
f :function(callback){
callback(null,this.act);
}
}
funcArr.push(fobj.f.bind(fobj));
}
}
async.series(funcArr,function(err,resArr){
console.log("resArr");
console.log(resArr);
res.render('home',{user:req.user,posts:JSON.stringify(resArr),stocks:JSON.stringify(stocks_array), other_users:JSON.stringify(users)});
});
}
});
}) // end of User.find
}// end of return function(req,res);
}
我想更新「測試」對象的post.comments財產(見**部分),但我無法這樣做。但是,當我將「測試」對象克隆爲「obj」時,則將其設置爲「obj.post.comments」。爲什麼會這樣?是因爲我搞砸了一些範圍問題?
謝謝。
我會盡力幫忙,但橫向滾動是PITA。跳躍。 – elclanrs