Questions tagged [mongoose]
Mongoose is a MongoDB object modeling tool, or ODM (Object Document Mapper), written in JavaScript and designed to work in an asynchronous environment.
46,850
questions
774
votes
13
answers
679k
views
Find MongoDB records where array field is not empty
All of my records have a field called "pictures". This field is an array of strings.
I now want the newest 10 records where this array IS NOT empty.
I've googled around, but strangely enough I haven'...
- 21.6k
716
votes
14
answers
836k
views
Find document with array that contains a specific value
If I have this schema...
person = {
name : String,
favoriteFoods : Array
}
... where the favoriteFoods array is populated with strings. How can I find all persons that have "sushi" as their ...
- 14.2k
509
votes
23
answers
714k
views
How do I update/upsert a document in Mongoose?
Perhaps it's the time, perhaps it's me drowning in sparse documentation and not being able to wrap my head around the concept of updating in Mongoose :)
Here's the deal:
I have a contact schema and ...
- 27.5k
436
votes
9
answers
253k
views
What is the "__v" field in Mongoose
I'm using Mongoose version 3 with MongoDB version 2.2. I've noticed a __v field has started appearing in my MongoDB documents. Is it something to do with versioning? How is it used?
- 8,862
431
votes
17
answers
464k
views
Mongoose: findOneAndUpdate doesn't return updated document
Below is my code
var mongoose = require('mongoose');
mongoose.connect('mongodb://localhost/test');
var Cat = mongoose.model('Cat', {
name: String,
age: {type: Number, default: 20},
...
- 8,438
367
votes
24
answers
595k
views
E11000 duplicate key error index in mongodb mongoose
Following is my user schema in user.js model -
var userSchema = new mongoose.Schema({
local: {
name: { type: String },
email : { type: String, require: true, unique: true },
...
- 5,926
361
votes
9
answers
333k
views
mongodb/mongoose findMany - find all documents with IDs listed in array
I have an array of _ids and I want to get all docs accordingly, what's the best way to do it ?
Something like ...
// doesn't work ... of course ...
model.find({
'_id' : [
'...
- 9,053
331
votes
8
answers
141k
views
Stop Mongoose from creating _id property for sub-document array items
If you have subdocument arrays, Mongoose automatically creates ids for each one. Example:
{
_id: "mainId"
subDocArray: [
{
_id: "unwantedId",
field: "value"
},
...
- 3,413
331
votes
12
answers
493k
views
Push items into mongo array via mongoose
Basically I have a mongodb collection called 'people'
whose schema is as follows:
people: {
name: String,
friends: [{firstName: String, lastName: String}]
}
Now, I have a ...
- 3,717
327
votes
36
answers
386k
views
How to paginate with Mongoose in Node.js?
I am writing a webapp with Node.js and mongoose. How can I paginate the results I get from a .find() call? I would like a functionality comparable to "LIMIT 50,100" in SQL.
- 10.5k
310
votes
10
answers
196k
views
Comparing mongoose _id and strings
I have a node.js application that pulls some data and sticks it into an object, like this:
var results = new Object();
User.findOne(query, function(err, u) {
results.userId = u._id;
}
When I do ...
- 3,563
286
votes
9
answers
217k
views
How do you turn a Mongoose document into a plain object?
I have a document from a mongoose find that I want to extend before JSON encoding and sending out as a response. If I try adding properties to the doc it is ignored. The properties don't appear in ...
- 42.7k
281
votes
22
answers
346k
views
Avoid "current URL string parser is deprecated" warning by setting useNewUrlParser to true
I have a database wrapper class that establishes a connection to some MongoDB instance:
async connect(connectionString: string): Promise<void> {
this.client = await MongoClient.connect(...
- 17.3k
261
votes
11
answers
182k
views
Difference between MongoDB and Mongoose
I wanted to use the mongodb database, but I noticed that there are two different databases with either their own website and installation methods: mongodb and mongoose. So I came up asking myself this ...
- 2,820
257
votes
12
answers
359k
views
Node.js Mongoose.js string to ObjectId function
Is there a function to turn a string into an objectId in node using mongoose? The schema specifies that something is an ObjectId, but when it is saved from a string, mongo tells me it is still just a ...
- 3,144
255
votes
22
answers
277k
views
add created_at and updated_at fields to mongoose schemas
Is there a way to add created_at and updated_at fields to a mongoose schema, without having to pass them in everytime new MyModel() is called?
The created_at field would be a date and only added when ...
- 74.2k
243
votes
21
answers
479k
views
How to sort in mongoose?
I find no documentation for the sort modifier. The only insight is in the unit tests:
spec.lib.query.js#L12
writer.limit(5).sort(['test', 1]).group('name')
But it doesn't work for me:
Post.find()....
- 9,048
219
votes
11
answers
256k
views
In Mongoose, how do I sort by date? (node.js)
let's say I run this query in Mongoose:
Room.find({}, (err,docs) => {
}).sort({date:-1});
This doesn't work!
- 266k
217
votes
7
answers
225k
views
How can I generate an ObjectId with mongoose?
I'd like to generate a MongoDB ObjectId with Mongoose. Is there a way to access the ObjectId constructor from Mongoose?
This question is about generating a new ObjectId from scratch. The generated ID ...
- 37.3k
211
votes
51
answers
237k
views
Cannot overwrite model once compiled Mongoose
Not Sure what I'm doing wrong, here is my check.js
var db = mongoose.createConnection('localhost', 'event-db');
db.on('error', console.error.bind(console, 'connection error:'));
var a1= db.once('...
- 3,391
207
votes
32
answers
412k
views
What's Mongoose error Cast to ObjectId failed for value XXX at path "_id"?
When sending a request to /customers/41224d776a326fb40f000001 and a document with _id 41224d776a326fb40f000001 does not exist, doc is null and I'm returning a 404:
Controller.prototype.show = ...
- 47.9k
205
votes
8
answers
366k
views
Mongoose, Select a specific field with find
I'm trying to select only a specific field with
exports.someValue = function(req, res, next) {
//query with mongoose
var query = dbSchemas.SomeValue.find({}).select('name');
query.exec(...
- 3,415
204
votes
11
answers
327k
views
MongoDB/Mongoose querying at a specific date?
Is it possible to query for a specific date ?
I found in the mongo Cookbook that we can do it for a range Querying for a Date Range
Like that :
db.posts.find({"created_on": {"$gte": start, "$lt": ...
- 5,891
199
votes
16
answers
184k
views
Populate nested array in mongoose
How can I populate "components" in the example document:
{
"__v": 1,
"_id": "5252875356f64d6d28000001",
"pages": [
{
"__v": 1,
"_id": "5252875a56f64d6d28000002",
...
- 3,631
195
votes
10
answers
198k
views
Properly close mongoose's connection once you're done
I'm using mongoose in a script that is not meant to run continuously, and I'm facing what seems to be a very simple issue yet I can't find an answer; simply put once I make a call to any mongoose ...
- 12k
193
votes
8
answers
168k
views
Mongoose - What does the exec function do?
I came across a piece of Mongoose code that included a query findOne and then an exec() function.
Ive never seen that method in Javascript before? What does it do exactly?
- 2,053
186
votes
35
answers
186k
views
Failed to load c++ bson extension
A total node noob here. I've been trying to set up a sample node app but the following error keeps popping up every time I try to run:
node app
Failed to load c++ bson extension, using pure JS ...
- 2,448
186
votes
8
answers
176k
views
Mongoose and multiple database in single node.js project
I'm doing a Node.js project that contains sub projects. One sub project will have one Mongodb database and Mongoose will be use for wrapping and querying db. But the problem is
Mongoose doesn't ...
- 1,901
176
votes
6
answers
430k
views
How to define object in array in Mongoose schema correctly with 2d geo index
I'm currently having problems in creating a schema for the document below. The response from the server always returns the "trk" field values as [Object]. Somehow I have no idea how this should work, ...
- 1,959
176
votes
18
answers
169k
views
mongoError: Topology was destroyed
I have a REST service built in node.js with Restify and Mongoose and a mongoDB with a collection with about 30.000 regular sized documents.
I have my node service running through pmx and pm2.
...
- 2,436
173
votes
11
answers
198k
views
How to access a preexisting collection with Mongoose?
I have a large collection of 300 question objects in a database test. I can interact with this collection easily through MongoDB's interactive shell; however, when I try to get the collection through ...
- 16.1k
173
votes
8
answers
66k
views
Why does mongoose always add an s to the end of my collection name
For example, this code results in a collection called "datas" being created
var Dataset = mongoose.model('data', dataSchema);
And this code results in a collection called "users" being created
var ...
- 2,149
166
votes
4
answers
238k
views
Mongoose's find method with $or condition does not work properly
Recently I start using MongoDB with Mongoose on Nodejs.
When I use Model.find method with $or condition and _id field, Mongoose does not work properly.
This does not work:
User.find({
$or: [
...
- 4,947
164
votes
30
answers
205k
views
Server Discovery And Monitoring engine is deprecated
I am using Mongoose with my Node.js app and this is my configuration:
mongoose.connect(process.env.MONGO_URI, {
useNewUrlParser: true,
useUnifiedTopology: true,
useCreateIndex: true,
...
- 3,103
162
votes
10
answers
140k
views
Delete a key from a MongoDB document using Mongoose
I'm using the Mongoose Library for accessing MongoDB with node.js
Is there a way to remove a key from a document? i.e. not just set the value to null, but remove it?
User.findOne({}, function(err, ...
- 20.1k
162
votes
15
answers
250k
views
Mongoose, update values in array of objects
Is there a way to update values in an object?
{
_id: 1,
name: 'John Smith',
items: [{
id: 1,
name: 'item 1',
value: 'one'
},{
id: 2,
name: 'item 2',
value: 'two'
...
- 24.1k
162
votes
4
answers
62k
views
mongoDB/mongoose: unique if not null
I was wondering if there is way to force a unique collection entry but only if entry is not null.
e
Sample schema:
var UsersSchema = new Schema({
name : {type: String, trim: true, index: true, ...
- 9,053
160
votes
9
answers
99k
views
Mongoose -- Force collection name
I am trying to use mongoose to create a database and a collection in it. My code is:
var mongoose = require('mongoose');
var db = mongoose.connect('mongodb://localhost/testdb');
var Schema = mongoose....
- 1,609
158
votes
6
answers
129k
views
Mongoose subdocuments vs nested schema
I'm curious as to the pros and cons of using subdocuments vs a deeper layer in my main schema:
var subDoc = new Schema({
name: String
});
var mainDoc = new Schema({
names: [subDoc]
});
or
var ...
- 39.1k
154
votes
8
answers
107k
views
How do you use Mongoose without defining a schema?
In previous versions of Mongoose (for node.js) there was an option to use it without defining a schema
var collection = mongoose.noSchema(db, "User");
But in the current version the "noSchema" ...
- 11.3k
153
votes
9
answers
303k
views
How to get all count of mongoose model?
How can I know the count of a model that data has been saved? there is a method of Model.count(), but it doesn't seem to work.
var db = mongoose.connect('mongodb://localhost/myApp');
var ...
- 1,533
153
votes
5
answers
219k
views
Referencing another schema in Mongoose
if I have two schemas like:
var userSchema = new Schema({
twittername: String,
twitterID: Number,
displayName: String,
profilePic: String,
});
var User = mongoose.model('User')
...
- 3,382
149
votes
2
answers
36k
views
Mongoose indexing in production code
Per the Mongoose documentation for MongooseJS and MongoDB/Node.js :
When your application starts up, Mongoose automatically calls ensureIndex for each defined index in your schema. While nice for ...
- 2,213
146
votes
7
answers
167k
views
How do I limit the number of returned items?
myModel.find({}, function(err, items) {
console.log(items.length); // Big number
});
How can I limit the returned items to only the latest 10 items that were inserted?
- 12.5k
145
votes
6
answers
195k
views
Mongoose query where value is not null
Looking to do the following query:
Entrant
.find
enterDate : oneMonthAgo
confirmed : true
.where('pincode.length > 0')
.exec (err,entrants)->
Am I doing the where ...
- 26.1k
142
votes
3
answers
116k
views
Mongoose findByIdAndUpdate not returning correct model
I have an issue I've not seen before with the Mongoose findByIdAndUpdate not returning the correct model in the callback.
Here's the code:
var id = args._id;
var updateObj = {updatedDate: ...
- 2,893
135
votes
37
answers
117k
views
Mongoose Unique index not working!
I'm trying to let MongoDB detect a duplicate value based on its index. I think this is possible in MongoDB, but through the Mongoose wrapper things appear to be broken. So for something like this:
...
- 11.2k
133
votes
8
answers
151k
views
Mongoose (mongodb) batch insert?
Does Mongoose v3.6+ support batch inserts now? I've searched for a few minutes but anything matching this query is a couple of years old and the answer was an unequivocal no.
Edit:
For future ...
- 41.7k
131
votes
14
answers
141k
views
Return certain fields with .populate() from Mongoose
I'm getting returned a JSON value from MongoDB after I run my query. The problem is I do not want to return all the JSON associated with my return, I tried searching the docs and didn't find a proper ...
- 2,388
130
votes
17
answers
295k
views
ERR_HTTP_HEADERS_SENT: Cannot set headers after they are sent to the client
I'm facing this weird issue in NodeJS when using with Passport.js, Express and Mongoose. Basically, I get an error saying "Cannot set headers after they are sent to the client" even though I don't ...
- 1,411