How Can I Update Multiple Documents in Mongoose?
I Found the Following Script: Device. Find(Function(Err, Devices) { Devices. forEach(function(device) { Device. Cid = ''; Device. Save(); }); }); Mongodb Has...
I found the following script:
Device.find(function(err, devices) {
devices.forEach(function(device) {
device.cid = '';
device.save();
});
});
MongoDB has the "multi" flag for an update over multiple documents but I wasn't able to get this working with mongoose. Is this not yet supported or am I doing something wrong?
Device.update({}, {cid: ''}, false, true, function (err) {
//...
});
7 Answers
Currently I believe that update() in Mongoose has some problems, see:
and .
However, check the docs for update: (its under Model). The definition is:
Earlier Solution(Depreciated after mongoose 5+ version)
Model.update = function (query, doc, options, callback) { ... }
You need to pass the options inside an object, so your code would be:
Model.update = function ({}, {cid: ''}, {multi: true}, function(err) { ... });
New Solution
Model.updateMany = function (query, doc, callback) { ... }
Model.updateMany = function ({}, {cid: ''}, function(err) { ... });
I believe that Mongoose wraps your cid in a $set, so this is not the same as running that same update in the mongo shell. If you ran that in the shell then all documents would be replaced by one with a single cid: ''.
Those answers are deprecated. This is the actual solution:
Device.updateMany({}, { cid: '' });
You have to use the multi: true option
Device.update({},{cid: ''},{multi: true});
as mentioned in the mongoose documents this is how we do this:
db.collection.updateMany(condition, update, options, callback function)
so this is an example based on the docs:
// creating arguments
let conditions = {};
let update = {
$set : {
title : req.body.title,
description : req.body.description,
markdown : req.body.markdown
}
};
let options = { multi: true, upsert: true };
// update_many :)
YourCollection.updateMany(
conditions, update, options,(err, doc) => {
console.log(req.body);
if(!err) {
res.redirect('/articles');
}
else {
if(err.name == "ValidationError"){
handleValidationError(err , req.body);
res.redirect('/new-post');
}else {
res.redirect('/');
}
}
});
this worked fine for me, I hope it helps :)
as @sina mentioned:
let conditions = {};
let options = { multi: true, upsert: true };
Device.updateMany(conditions , { cid: '' },options );
you can add a callback function after options but it's not necessary.
You can try the following way
try {
const icMessages = await IcMessages.updateMany({
room: req.params.room
}, {
"$set": {
seen_status_2: "0"
}
}, {
"multi": true
});
res.json(icMessages)
} catch (err) {
console.log(err.message)
res.status(500).json({
message: err.message
})
}
await Device.updateMany({_id: {$in: cid}},{ $set: {columnNameHere: "columnValueHere"}},{multi:true,upsert: true,new: true});
David Miller brings 15 years of experience in global economics, personal finance strategy, and market dynamics. He specializes in turning complex economic trends into actionable insights for everyday readers.
