I have to serve an HTML tables with more than 3000 results, getting MachineID, Username, Data from my MongoDB. BUT, i'm having a problem when im rendering the data to datatables.
The Data and MachineID comes from model/table Logs, and the Username comes from User. The relation between them will be user_id from Logs and the _id object from User.
As you can see on my query, im trying to compare pc.user_id with the object _id of parent table, to get the username of that process.
My query:
Pincode.find({}).exec(async (err: any, pincodes: any) => {
for (var pc of pincodes){
var uid = pc.user_id;
var res = await User.findById({ _id:ObjectId(uid) },'username').exec();
if(res!= null){
pc.user_id = res.username
}else{
pc.user_id = "Unknown"
}
}
But this is slowing SO much my query because im looping trhougt all +3000 documents.
Thanks for your answers,
You can try this:
let getData = async () => {
try {
let pincodeData = await Pincode.find({}).exec()
if (pincodeData.length < 1) {
return res.send({"error": true, "message": "No data found"});
}
await Promise.all(
pincodeData.map(async (x) => {
let getUserData = await User.findOne(
{ _id: ObjectId(x.user_id) },
{ _id: 0, username: 1}
).exec();
x.user_id: 'Unknown';
if (getUserData) {
x.user_id: getUserData.username;
}
})
)
return res.send({ "error": false, "message": "Data found", "data": pincodeData });
} catch (error) {
return res.send({ "error": true, "message": "No data found" });
}
}
getData()