[英]nodejs express response append into a list
I have multiple res.send
in one route, how can I append them all into one and send the accumulated list at the end? 我在一条路由中有多个
res.send
,如何将它们全部附加到一个并在末尾发送累积的列表? I prefer to do it in the following form: 我更喜欢以以下形式进行:
{
"writer": {success message},
"archive": {success message},
...
}
and another one like above for the list errors. 另一个类似上面的错误列表。 here is the code:
这是代码:
router.post('/some/route', function (req, res) {
if (req.isLoggedIn()) {
return res.status(403).json({});
}
MyModel.findById(req.user._id,function (err, data) {
if(err || data.rights !== 'super'){
return res.status(403).json({});
}
if(req.body.writer){
Books.update(
{ writer : req.body.id},
{ $set : { writer : req.body.writer} },
function (err) {
if(err){
res.status(500).send(err);
}
else{
res.status(200).send('updated successfully.');
}
}
);
}else{
Books.remove({writer: req.body.id}, function(err){
if (err){ return console.log(err)}
});
}
MetaInfo.findOneAndRemove({_id: req.body.id}, function (err, data) {
console.log(err);
});
Archive.findOne({_id: req.body.id},function (err, data) {
smtpTransporter.sendMail({...}, function (error, response) {
if (error) {
console.log(error);
} else {
console.log("Mail sent");
}
smtpTransporter.close();
});
data.remove();
if (err) {
console.log(err);
return res.status(200).json({
success: false,
message: 'server error',
err: err
});
}
res.status(200).json({
success: true
});
})
});
});
I assume your problem are the asynchronous calls to the database. 我假设您的问题是对数据库的异步调用。
So best take a library of your choice (for example async ) and do your async processes, in the callback then finally send your result. 因此,最好采用您选择的库(例如async )并进行异步处理,然后在回调中最后发送结果。
Your result could look like this: 您的结果可能如下所示:
async.parallel([ function(callback) { ... }, function(callback) { ... } ], function(err, results) { // send your result here });
Note that if you are using .parallel
the final callback will be immediatly called if one of the promises fails. 请注意,如果您使用
.parallel
,则其中一个promise失败时,将立即调用最终回调。 see the docu 见纪录片
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