I am not being able to remove the specific eventid from the UserSchema. I searched for this and got a method using unset but that is removing the whole user while the push function is not doing anything. Is there any other way to do this?
Current UserSchema
[
{
"_id": "56593f3657e27af8245735d7",
"username": "abc",
"name": "xyz",
"__v": 0,
"favouriteid": [
{
"eventid": "5659242639e43bfc2a0836b9",
"_id": "56593f6b57e27af8245735d8"
},
{
"eventid": "5659244039e43bfc2a0836ba",
"_id": "56593f8857e27af8245735d9"
}
]
}
]
What I need-
[
{
"_id": "56593f3657e27af8245735d7",
"username": "abc",
"name": "xyz",
"__v": 0,
"favouriteid": [
{
"eventid": "5659242639e43bfc2a0836b9",
"_id": "56593f6b57e27af8245735d8"
}
]
}
]
I will be passing eventid and userid
But when I am using this code, the user gets deleted itself rather than the required field.
api.post('/removefavourites', function (req, res) {
// _id: req.body.id;
User.findById({_id: req.body.userid},
{$unset:{favouriteid: {eventid: req.body.eventid}}},
{upsert: true},
function (err) {
if(err)
return err;
else
res.json({success: true});
});
});
You can use update method with pull operation as shown below:
api.post('/removefavourites', function (req, res) {
// _id: req.body.id;
User.update({_id: req.body.userid},
{$pull:{favouriteid: {eventid: req.body.eventid}}},
function (err) {
if(err)
return err;
else
res.json({success: true});
});
});
Hope this helps :)
Related
I'm trying to get a subdocument (nested in array) by its id, but I still get the whole document.
router.get("/book/:libraryid/:bookid", (req, res) => {
Library.findOne({ _id: req.params.libraryid, "book._id": req.params.bookid})
.then(result => {
console.log(result); //shows all subdocument
});
});
How can I just pick out the subdocument with its id?
Schema:
{
"_id": {
"$oid": "12345"
},
"libaryName": "A random libary",
"Books": [
{
"_id": {
"$oid": "1"
}
"bookTitle": "Example",
"TotalPages": "500"
},
{
"_id": {
"$oid": "2"
}
"bookTitle": "Delete Me",
"TotalPages": "400"
}
]
}
Use the following and it should return you the document with only filtered book based on bookId.
router.get("/book/:libraryid/:bookid", (req, res) => {
Library.findOne({ _id: req.params.libraryid}, {"books": {"$elemMatch": {_id: req.params.bookid}}})
.then(result => {
console.log(result); //shows all subdocument
});
});
{
"_id": {
"$oid": "5a4e5b1d09fb590058bfdf86"
},
"name": "ProjectStore",
"imageURL": "none",
"longitude": 0,
"latitude": 0,
"rating": 5,
"leads": [
{
"customerId": "5a0c57db65a4931768716566",
"customerName": "testuser",
"interested": "testuser",
"_id": {
"$oid": "5a4e5b5409fb590058bfdf88"
}
}
],
"items": [
{
"name": "chat",
"categoryID": "5a0c2d292235680012bd12c9",
"semiCatID": "5a0c2d5f2235680012bd12cb",
"_id": {
"$oid": "5a4e5b3009fb590058bfdf87"
}
}
],
"__v": 2
}
I added my DB log, I try to write query that will let me update/push information to "LeadStatus".
This varible should be inside each object in the "leads" array.
I have the keys for the main id "5a4e5b1d09fb590058bfdf86"
I have the second key for the specific lead "5a4e5b5409fb590058bfdf88"
I just dont know how to write the query, for now i got this.... and got error.
Store.update(
{ _id: req.body.store._id, 'leads._id': 'req.body.lead._id', },
{ $set: { 'leads.$.LeadStatus': 'open' }, },
(err, result) => {
if (err) {
res.status(500)
.json({ error: 'Unable to update leads.', });
} else {
res.status(200)
.json(result);
}
}
);
Please Help,
Thanks.
I'm assuming you want the updated doc returned (you can choose to not do so as well, switch option new to false). You have to assign an object the value that you're updating and provide all the fields within the subfield you're updating, otherwise it will remove everything else. That's why you have to do a findOne first:
return Store.findOne({ '_id': "5a4e5b1d09fb590058bfdf86" })
.then((store) => {
if (!store) { // patient was not found for some reason
throw new Error(`Store id was not found`);
}
const options = {
new: true,
};
const updatedStore = Object.assign({}, store.toObject(), {
leads: [
{
"leadStatus": "open",
"customerId": "5a0c57db65a4931768716566",
"customerName": "testuser",
"interested": "testuser",
"_id": {
"$oid": "5a4e5b5409fb590058bfdf88"
}
}
],
});
return Store.findOneAndUpdate(
{ '_id': req.body.store._id },
{ $set: updatedStore },
options);
});
In case you're curious, you can build pre/virtual hooks off of findOneAndUpdate (no documentation for this), you won't lose anything from not using update.
"_id": {
"$oid": "577cc50d10b5a6c42b26f414"
},
"firstName": "new",
"lastName": "new",
"__v": 0,
"A": [
{
"AfirstName": "AfirstName",
"AlastName": "AlastName",
"_id": {
"$oid": "577dbef2f2c9f5901f402efe"
},
"AB": [
{
"AB1firstName": "AB1firstName",
"AB1lastName": "AB1lastName",
"_id": {
"$oid": "577dd3b1495663ec2a6ca456"
}
},
{
"AB2firstName": "AB2firstName",
"AB2lastName": "AB2lastName",
"_id": {
"$oid": "577dd3bc495663ec2a6ca45a"
}
}
]
}
]
Example.update({ _id: , A._id: , A.AB._id: } ,
{"$set": {"A.$.AB": data}},
function(err,model){ console.log(model); if (err) throw err; })
This will just update the first data of AB i want to update data of AB sub-doc by _id and also want to remove the particular nested sub-doc with _id
Example.findById(_id,function(err,doc){
var result = doc.A.id(AId).AB.id(AB.ABId);
result.AB1firstName="first Name";
result.AB1lastName= "Last Name";
doc.save();
});
This will update
Each document has an _id. DocumentArrays have a special id method for looking up a document by its _id.
Example.findOne({ _id: id, A._id: Aid, A.AB._id: ABid},
function(err,model){
if (err) throw err;
var ABDoc model.A.id(Aid).AB.id(ABid);
ABDoc.AB2firstName="new value";
ABDoc.AB2lastName="new value";
model.save();
})
I have a very simple mongoose query, that returns correctly but the field display ordering is not consistent. Notice how sometimes it lists _id and then username and sometimes it lists username and then _id. Any way to fix this?
exports.list = function(req, res){
return db.userModel.find({}, 'username', function (err, users) {
if(!err) {
return res.json(users);
} else {
console.log(err);
return res.send(400);
}
});
}
Output
[
{
"username": "admin",
"_id": "5145293a420135521c000001"
},
{
"username": "bob",
"_id": "5145293b420135521c000002"
},
{
"_id": "5145293b420135521c000003",
"username": "example"
}
]
I have been thinking of using Node and MongoDb for a ratings system for an Android app, so far I have implemented Create, Update and Delete fine but am at a loss as to what to do when I want to get the average rating back from the DB. Here is the data structure I gave decided upon:
[
{
"_id": "1",
"ratings": [
{
"value": "5",
"user": "CoolUser1"
},
{
"value": "4",
"user": "CoolUser2"
}
]
},
{
"_id": "2",
"ratings": [
{
"value": "4",
"user": "CoolUser3"
},
{
"value": "2",
"user": "CoolUser4"
}
]
}
]
Basically what I need is the average value in ratings for a given _id.
Here is the Update method I am using to give a sense of how I have setup the mongoDB connection:
exports.updateRating = function(req, res) {
var id = req.params.id;
var rating = req.body;
console.log('Updating a rating: ' + id);
console.log(JSON.stringify(rating));
ratings.update({'_id': id},
{$push: rating},
{upsert:true},
function(err, result) {
if (err) {
console.log('Error updating rating: ' + err);
res.send({'error':'An error has occurred'});
} else {
console.log('' + result + ' document(s) updated');
res.send(rating);
}
}
);
}
Is it critical to store ratings.value as a string?
This will work, but only if you convert rating to number before safe
ratings.aggregate([
{ $match: { _id: id } },
{ $unwind: '$ratings' },
{ $group: { _id: null, avg: { $avg: '$ratings.value' } } }
], function(err, result) {
console.log(result);
db.close();
});