I am doing currently doing as
if (part.qty) {
part.status = 'In Stock';
}
const part = new partsModel(part);
return part.save();
is it possible do this in MongoDB query only without using if statement both insert and update
You can try something like:
const filterObj = {
"$or": [{
"qty": {
"$exists": true
}
}, {
"qty": {
"$ne": null
}
}, {
"qty": {
"$ne": 0 //based on what type of value you have in qty
}
}]
};
const updateObj = {
"$set": {
"status": "In Stock"
}
};
partsModel.update(filterObj, updateObj)
.then(result => {
console.log(result);
})
.catch(err => {
console.log(err);
});
This will update the first matching record with our filters. If you wanna update all matching records use updateMany() instead.
Check out the official mongoose docs for more details.
P.s: You may need some modifications as i couldn't get a chance to try the code. hope this helps :)
Related
I'm trying to get all documents from my database collection "posts" but I'm getting an empty array instead.
The strange thing is that I'm able to get all documents from another collection called "users" that has the same structure and using the exact same code.
I've spent days looking for an answer but I haven't been able to find the solution.
This is the request:
const db = admin.firestore();
exports.getAllPosts = (req, res) => {
db.collection('posts')
.orderBy('createdAt', 'desc')
.get()
.then(snapshot => {
let posts = [];
snapshot.forEach((doc) => {
posts.push({
id: doc.id,
body: doc.data().body,
author: doc.data().author,
createdAt: doc.data().timestamp,
voteScore: doc.data().voteScore
});
});
return res.json(posts);
})
.catch(err => {
console.error(err);
res.status(500).json({ error: err.code });
});
}
And this is the response:
[]
This is what my current collection looks like:
Posts collection screenshot
This the response that I get when I return "snapshot":
{
"_query": {
"_firestore": {
"_settings": {
"projectId": "readable-bf7a6",
"firebaseVersion": "9.6.0",
"libName": "gccl",
"libVersion": "4.10.0 fire/9.6.0"
},
"_settingsFrozen": true,
"_serializer": {
"allowUndefined": false
},
"_projectId": "readable-bf7a6",
"registeredListenersCount": 0,
"bulkWritersCount": 0,
"_backoffSettings": {
"initialDelayMs": 100,
"maxDelayMs": 60000,
"backoffFactor": 1.3
},
"_clientPool": {
"concurrentOperationLimit": 100,
"maxIdleClients": 1,
"activeClients": {},
"failedClients": {},
"terminated": false,
"terminateDeferred": {
"promise": {}
}
}
},
"_queryOptions": {
"parentPath": {
"segments": []
},
"collectionId": "posts",
"converter": {},
"allDescendants": false,
"fieldFilters": [],
"fieldOrders": [
{
"field": {
"segments": [
"createdAt"
]
},
"direction": "DESCENDING"
}
],
"kindless": false
},
"_serializer": {
"allowUndefined": false
},
"_allowUndefined": false
},
"_readTime": {
"_seconds": 1622395245,
"_nanoseconds": 513743000
},
"_size": 0,
"_materializedDocs": null,
"_materializedChanges": null
}
Notice how the request for the collection "users" works successfully:
const db = admin.firestore();
exports.getAllUsers = (req, res) => {
db.collection('users')
.orderBy('createdAt', 'desc')
.get()
.then(snapshot => {
let users = [];
snapshot.forEach((doc) => {
let users = [];
snapshot.forEach((doc) => {
users.push({
id: doc.data().userId,
email: doc.data().email,
handle: doc.data().handle
});
});
return res.json(users);
})
.catch(err => {
console.error(err);
res.status(500).json({ error: err.code });
});
}
And the response:
[
{
"id": "EPoHBxhQFUXbcL3TCVx1LdUG2nO2",
"email": "ruben#gmail.com"
},
{
"id": "RqEa3dEq8TSDcZYeolXafju67rB2",
"email": "user10#gmail.com"
},
{
"id": "dxveb4n2iMQej5Q14uprsKRxFp23",
"email": "user4#gmail.com",
"handle": "user4"
},
{
"id": "YQPzBPcsqlVZk9iJEuZTHKUNuVG2",
"email": "user2#gmail.com",
"handle": "user2"
},
{
"id": "CZ05BJxi3TUOpIrmBaz539OWlbC3",
"email": "user#gmail.com",
"handle": "user"
},
{
"id": "t0t83BVwt4gVgJkDv7HL1r1MaKr1",
"email": "userJose2#gmail.com",
"handle": "Jose"
}
]
This is what the users collection looks like in Firebase:
Users collection screenshot
Why is one collection failing when the other works fine and I'm using the same code? What am I missing here?
Thanks in advance and I hope I've made it as clear as possible. Please let me know if you need me to provide anything else.
Very simple my friend, your posts documents can't be ordered like this:
.orderBy('createdAt', 'desc')
Because the post documents does not have the createdAt property, but they have a timestamp property, you should use that property to order your posts like this:
.orderBy('timestamp', 'desc')
I hope that helps 👍
I am not answering directly to #Ruben Garcia Bri, but for future firebase developers who may run into the problem of getting empty documents, I also ran into the same problem, but I solved it by adding a field to the particular document I am trying to retrieve.
Sometimes the cause is because the documents you are trying to get have no field in them.
I mean that a document must have a field before the server can recognize it as an existing document.
So if you run into this problem, consider adding a field to that document before you can successfully retrieve it.
I have a mongo schema like this.
{
userID:19202,
products:[ { id:020, name:'first' }]
}
I want to pop items from the product array based on id. I used the following command. although it didn't give any error, it also not deleting elements from an array.
userCart.updateOne(
{ userID:userID},
{ $pull: { products: { id:id } } }
)
.then((data) =>
{
if(data)
{
//data is {
"n": 1,
"nModified": 0,
"ok": 1
}
return res.json({
status:true,
message:"cart updated"
})
}
})
Demo - https://mongoplayground.net/p/mh6fXN21vyR
Make sure id and products.id are of the same type as in your document in the database. As your sample, both should be numbers.
if they both are number
db.collection.update({
userID: 19202
},
{
$pull: {
"products": { id: 20 }
}
})
Not Working here - https://mongoplayground.net/p/3zhv8yoH2o9 when "products": { id: "20" }. products.id is a string in the mongo query and in the database in number so mismatched.
Try this one:
db.userCart.update(
{ userID:userID },
{ $pull: { items: { id: 020 } } },
false, // Upsert
true, // Multi
);
mongodb collection:
"_id": ObjectId("5e2ac528e9d99f3074f31de7"),
"publications": [
{
"_id": ObjectId("5e2ac528e9d99f3074f31de8"),
"name": "Times of India",
"productCode": "TCE1",
"tradeCopies": 40
},
{
"_id": ObjectId("5e2ac528e9d99f3074f31de9"),
"publicationName": "Economic Times",
"productCode": "ECE1",
"tradeCopies": 100
}
],
"orderCreatedBy": ObjectId("5e2977e1cc1208c65c00648b"),
"submittedTo": ObjectId("5e2555363405363bc4bf86c2"),
Nodejs Code
i would get multiple "productCode" like "TCE1","ECE1" etc,and i need to update tradeCopies of all the object array elements in one go according to their productCodes
Here is what i tried
exports.editOrder = async (req, res, next) => {
const { orderId, dealerId, productCode, tradeCopies } = req.body;
try{
const orders: await Order.updateOne(
{ _id: orderId,
submittedTo: dealerId,
"publications.productCode": productCode},
{$set:{"publications.$.tradeCopies":50}}
)
res.status(200).json({
orders,
message: "order submitted"
});
} catch (error) {
res.send(error);
}
};
CONCERNS
1-this query is updating only 1 array object element according to the matched productCode i want all the tradeCopies of all the array objects according to their productCodes to be updated in onego
2- the above query is working only in mongo Shell not in nodejs driver and whenever i remove double quotes in nodejs query vscode shows there might an error
You want to use arrayFilters.
const orders: await Order.updateOne(
{ _id: orderId,
submittedTo: dealerId,
"publications.productCode": productCode
},
{ $set: { "publications.$[element].tradeCopies":50 } },
{ arrayFilters: [ { "element.productCode": productCode } ] }
)
I'm not sure what you mean by removing the double quotes, but this snippet is nodejs driver compatible.
I post this question in relation to my use case.
It is true that there is a lot of response in the same subject but I do not find an answer .
that is why I ask you for help Thanks.
I would like to be able to update the lineItemStatus inside lineItems array.
Here is my model :
const orderSchema = new Schema(
lineItems: [{
lineItemStatus: {
type: String,
default: 'en waiting for validation',
lowercase: true
}
}]
)
The result look like this
{
"_id": "5c659cd0be79c124126d5ec2",
"lineItems": [{
"lineItemStatus": "waiting for validation", //the status to update
"_id": "1"
},
{
"lineItemStatus": "delivered",
"_id": "2"
}
]
}
First I'm able to get a single item of lineItems.
this is the code
async updateStatus(req, res) {
let givenLineItemId = req.body.lineItemId
let givenlineItemStatus = req.body.status // the status to update
try {
const ObjectId = mongoose.Types.ObjectId
const aggregationStages = [
{
$unwind: '$lineItems'
},
{
$match: {
'lineItems._id': ObjectId(givenLineItemId)
}
}
]
await Order
.aggregate(aggregationStages)
.exec(function(err, orders) {
if (err) res.status(400).send(err)
res.status(200).send(orders)
})
} catch (err) {
return res.status(500).send(err)
}
}
But now i'm not able to to update the lineItemStatus i see some way to use set or push but it doesn't work.
Thanks a lot for the help.
The aggregation stage itself does not support updates. You have two options:
1) Collect the aggregate results into a variable and do a bulk update. See link.
2) Call forEach on the aggregate. You can see samples provided in this answer.
Just a note I am fairly new to mongo and more notably very new to using node/js.
I'm trying to write a query to insert new documents or update already existing documents in my collection.
The proposed structure of the collection is:
{ _id: xxxxxxx, ip: "xxx.xxx.xxx.xxx:xxxxxx", date: "xx-xx-xx xxxx" }
Note that my intention is a store an fixed length int for the _id rather than the internal ObjectId (is this possible/considered bad practice?). The int is guaranteed to be unique and comes from another source.
var monk = require('monk');
var db = monk('localhost:27017/cgo_schedule');
var insertDocuments = function(db, match) {
var db = db;
var collection = db.get('cgo_schedule');
collection.findAndModify(
{
"query": { "_id": match.matchId },
"update": { "$set": {
"ip": match.ip,
"date": match.date
},
"$setOnInsert": {
"_id": match.matchId,
}},
"options": { "new": true, "upsert": true }
},
function(err,doc) {
if (err) throw err;
console.log( doc );
}
);
}
This doesn't work at all however. It doesn't insert anything to the database, but it also gives no errors, so I have no idea what I'm doing wrong.
The output (for console.log (doc)) is null.
What am I doing wrong?
The Monk docs aren't much help, but according to the source code, the options object must be provided as a separate parameter.
So your call should look like this instead:
collection.findAndModify(
{
"query": { "_id": match.matchId },
"update": {
"$set": {
"ip": match.ip,
"date": match.date
}
}
},
{ "new": true, "upsert": true },
function(err,doc) {
if (err) throw err;
console.log( doc );
}
);
Note that I removed the $setOnInsert part as the _id is always included on insert with an upsert.