I try to query data from mongodb with spesific column, at first it returns all the value and columns i need but then when i try to change the value of the timestamp to date it shows error like this
Options must be an object, got \"_id formId title username date createdAt\"
Here is my code
const answers = await Answer.find(
{ userId: req.params.userId },
{ $toDate: "createdAt" },
"_id formId title username date createdAt"
);
i wonder where did i do wrong here...
Try using aggregate:
const answers = await Answer.aggregate([
{ $match: { userId: req.params.userId } },
{
$project: {
formId: 1,
title: 1,
username: 1,
date: 1,
createdAt: { $toDate: '$createdAt' },
},
},
]);
Related
I have an array of reviews, I want to add a review using addToSet that will check if user is present in the array, then we do not want to add since one user can only review once.
My schema looks like this:
const sellerSchema = new mongoose.Schema({
user: {
type: mongoose.Schema.Types.ObjectId,
ref: "User",
unique: true,
},
reviews: [
{
by: {
type: mongoose.Schema.Types.ObjectId,
ref: "User",
unique: true,
},
title: {
type: String,
},
message: {
type: String,
},
rating: Number,
imagesUri: [{ String }],
timestamp: {
type: Date,
default: Date.now,
},
},
],
});
I might be doing the query wrong, but can't figure out how to add a review and check if current user has not reviewed before.
Here is the query where I add the review:
router.post("/review/:_id/", async (req, res) => {
try {
const stylist_id = mongoose.Types.ObjectId(req.params._id);
const review = {
by: req.user._id,
title: req.body.title,
message: req.body.message,
rating: parseFloat(req.body.rating),
};
if (req.body.imagesUri) {
//if there is images, we need to set it up
review.imagesUri = req.body.imagesUri;
}
await Seller.updateOne(
{ _id: seller_id },
{ $addToSet: { reviews: review } } //get the review that matches to the user_id
);
return res.status(200).send(true);
}catch(err){
res.status(502).send({
error: "Error creating a review.",
});
}
});
I'm thinking of checking for seller's id and also check that no review is by current user, but it is not working.
const userID = req.user._id;
await Seller.updateOne(
{ _id: seller_id, reviews: { $elemMatch: { by: { $ne: { userID } } } } },
{ $addToSet: { reviews: review } } //get the review that matches to the user_id
);
ANSWER:
I was able to solve the issue, in case other people have same issue. I did this:
await Seller.updateOne(
{
_id: seller_id,
"reviews.by": { $nin: [req.user.id] },
//knowing req.user._id is a mongoose.Types.ObjectId.
//You can also use [id1, id2, ...] to the array to check for other id's
},
{ $addToSet: { reviews: review } } //get the review that matches to the user_id
);
Here is the documentation for $nin operator: https://www.mongodb.com/docs/manual/reference/operator/query/nin/
You are pushing the review object inside an object.
Instead do this:
await Seller.updateOne(
{ _id: seller_id },
{ $addToSet: { reviews: review } }
);
I am trying to check if there is an existing conversation between two users before creating another one.
My Conversation object stores the conversation participants in an array, I need to return a conversation object that has BOTH participants (senderId & recId) that exists in my database but I am unable to build to correct MongoDB query to get it.
Please see the queries I have tried below because I have tried all manner of using $and & $elemMatch but can't get it to work.
Thank you
Conversation Model
const conversationSchema = mongoose.Schema(
{
participants: [participantSchema],
},
{timestamps: true}
)
const participantSchema = mongoose.Schema(
{
userId: {
type: mongoose.Schema.Types.ObjectId,
required: true,
ref: `User`,
},
username: {
type: String,
required: true,
}
}
)
Conversation Object
{
_id: 61cb6316asas4b54e09168234,
participants: [
{
userId: 61b777ea6815a69a625b,
username: 'johnsmith'
},
{
userId: 61bc0dcbe7181ccfd806,
username: 'testuser'
}
],
createdAt: 2021-12-28T19:18:46.673Z,
updatedAt: 2021-12-28T23:41:12.364Z
}
Queries I have tried that ARE NOT what I need or don't work
// null - no convo found when the convo definitely exists in db
const existingConvo = await Conversation.findOne({
$and: [{ userId: senderId }, { userId: recId }],
})
// works but only checks for ONE id property
// if I make an array: "Query filter must be an object, got an array"
const existingConvo = await Conversation.findOne({
participants: { $elemMatch: { userId: senderId } },
})
// "Unknown operator $and"
const existingConvo = await Conversation.find({
participants: {
$and: [{ userId: senderId }],
},
})
// returns empty array when it should have the convo object
const existingConvo = await Conversation.find({
participants: { $all: [{ userId: senderId }, { userId: recId }] },
})
I need to take array from my model, delete from it some days and push to it some other days. It looks something like deleteAndUpdate.
To sum up:
I need to take Car from database. Take reserved property (it's a array), then delete from reserved days from given list, and then add to reserved days from other given list.
My model look:
const CarSchema = mongoose.Schema({
mark:{
type: String,
required: true,},
model:{
type: String,
required: true,},
price:{
type: Number,
required: true,},
available: {
type: Boolean,
required: true,},
reserved:{
type:[Date],
},
pic_1:{
type:String,
required:true,
},
pic_2:{
type:String,
required:true,
},
},
{ collection: 'cars' }
)
I take car by: var car= await Car.findById(carID); and then i need to do sth like that:
car['reserved'].deleted(old_days);
car['reserved'].push(new_days;
car.save();
Could someone help me?
Update can't allow multiple operation at a time in same field, It will throw multiple write error and would create a conflict at your field,
Regular update:
If you want to do it by regular update query you have to do separate do 2 queries,
Delete days: If you want to delete multiple days use $pullAll, and for single you can use $pull
var old_days = [new Date("2021-04-24"), new Date("2021-04-25")];
await Car.updateOne({ _id: carID }, { $pullAll: { reserved: old_days } });
Add days: if you want to add multiple days you can use $push with $each, and for single you can use just $push,
var new_days = [new Date("2021-04-26"), new Date("2021-04-27")];
await Car.updateOne({ _id: carID }, { $push: { reserved: { $each: new_days } } });
Update with aggregation pipeline:
If you are looking for single query you can use update with aggregation pipeline starting from MongoDB 4.2,
$filter to iterate loop of reserved array and remove old days
$concatArrays to concat reserved array with new days
var old_days = [new Date("2021-04-24"), new Date("2021-04-25")];
var new_days = [new Date("2021-04-26"), new Date("2021-04-27")];
await Car.updateOne(
{ _id: carID },
[{
$set: {
reserved: {
$filter: {
input: "$reserved",
cond: { $not: { $in: ["$$this", old_days] } }
}
}
}
},
{
$set: {
reserved: {
$concatArrays: ["$reserved", new_days]
}
}
}]
);
Playground
To remove old item from array you can use $pull
car.update(
{ _id: carID },
{ $pull: { 'reserved': old_days } }
);
You can use $unset to unset the value in the array (set it to null), but not to remove it completely.
To add the item new_days in array, You can either use $push or $addToSet
car.update(
{ _id: carID },
{ $push: { 'reserved': new_days } }
);
I'm trying to update a value inside my array of objects.
Looking at the above mongoDB schema what I want is:
Find an expense with the ID match with the _id and need to update the fields with new ones from the req.body.
Just need to update the: expensesType, description, price and status.
The following code is what I tried to do.
First I need to match the right expense and it works fine but when I try to house.save() show me a message 'house.save is not a function'. So I think maybe I need to use a mongoDB function to get the result.
router.put("/editExpense/:id", ensureAuthenticated, (req, res) => {
var id = mongoose.Types.ObjectId(req.params.id);
House.find(
{ "expensesHouse._id": id },
{
members: 1,
name: 1,
description: 1,
address: 1,
type: 1,
user: 1,
userID: 1,
userType: 1,
expensesHouse: { $elemMatch: { _id: id } },
date: 1
}
).then(house => {
console.log(house);
expenseType = req.body.expenseType;
description = req.body.description;
price = req.body.price;
status = req.body.status;
house.save().then(() => {
req.flash("success_msg", "Expenses Updated");
res.redirect("/houses/dashboard");
});
});
});
****** UPDATED ******
After a search I found this updateOne and after adjusts, this is my final result but this way I delete every record..
router.put("/editExpense/:id", ensureAuthenticated, (req, res) => {
var id = mongoose.Types.ObjectId(req.params.id);
House.updateOne(
{ "expensesHouse._id": id },
{
members: 1,
name: 1,
description: 1,
address: 1,
type: 1,
user: 1,
userID: 1,
userType: 1,
expensesHouse: { $elemMatch: { _id: id } },
date: 1
},
{ $set: { "expensesHouse.expenseType": req.body.expenseType } }
).then(house => {
req.flash("success_msg", "Expenses Updated");
res.redirect("/houses/dashboard");
});
});
*********** RESOLUTION ***********
I just fixed the problem the way I show below.
House.updateOne(
{ "expensesHouse._id": id },
{
$set: {
expensesHouse: {
expenseType: req.body.expenseType,
description: req.body.description,
price: req.body.price,
status: req.body.status
}
}
}
You are really close to the answer the problem right now that you are having is syntax difference between find and UpdateOne
This is what Find expects, Check MongoDB docs
db.collection.find(query, projection)
This is what updateOne expects, Check Mongo docs
db.collection.updateOne(
<filter>,
<update>,
{
upsert: <boolean>,
writeConcern: <document>,
collation: <document>,
arrayFilters: [ <filterdocument1>, ... ],
hint: <document|string> // Available starting in MongoDB 4.2.1
}
)
See the Difference? Second parameter should be update not projection because Update one
returns
matchedCount containing the number of matched documents
modifiedCount containing the number of modified documents
upsertedId containing the _id for the upserted document.
A boolean acknowledged as true if the operation ran with write concern or false if write concern was disabled.
So Your code should be
House.updateOne(
{ "expensesHouse._id": id },
{ $set: { "expensesHouse.expenseType": req.body.expenseType } }
).then(house => {
req.flash("success_msg", "Expenses Updated");
res.redirect("/houses/dashboard");
});
});
House.findOneAndUpdate({userId : req.params.userId},
{ $set: { "expensesHouse.$[element].status": req.body.status } },
{ multi:true, arrayFilters: [{ "element.userID" : req.params.subUserId }], new:true })
Your Api reuquest consist of both the IDs (outer as well as inner) like /api/update/:userId/:subUserId
I have the following sub-documents :
{
id: 1,
date:2019-04-01 00:21:19.000
},
{
id: 2,
date:2019-03-31 00:21:19.000
} ...
Document schema is :
const barEventSchema = new Schema({
id: {
type: Number,
unique: true,
required: true
},
raw: { type: String },
date: { type: Date },
type: { type: String },
})
const FooSchema = new Schema({
bar: [barEventSchema]
})
I want to do a query based on a date range picked from html input, which has values like 2019-04-01, 2019-03-31.
So on serverside, I want to do something like:
//#star_date = 2019-04-01, #end_date = 2019-04-01
Foo.findOne('bar.date' : {$lte : start_date, $gte: end_date})
However, this returns all the documents.
All documents having any subdocument with date between start and end date range can be retrieved using:
const conditions = {
'bar': {
$elemMatch: {
'date': {
$gte: new Date(start_date),
$lte: new Date(end_date)
}
}
}
}
Foo.find(conditions)
This will return all the documents where there is at least a subdocument having its date between the range specified in condition.
The $elemMatch operator is used to effect this condition on the date field of the bar subdocument.