I'm working on a food blog. I would want to achieve the following structure for the food recipes in my database.
recipes : [
{mainCategoryRecipe1: {...}},
{mainCategoryRecipe2: {...}},
subcategory1: [
{recipe1: {...}}
]
]
I'm posting a form with select field indicating the correct category and subcategory (if needed). I can access these in the Node.js backend.
I can't figure out how to $push in to the database so the data follows the correct structure. I'm using MongoJS. My attempt on this resolves with this structure instead:
recipes : [
{subcategory1 : recipe1[...]},
{subcategory1 : recipe2[...]}
]
Here is my code:
db.collection.findAndModify({
query:{_id: mongojs.ObjectId(userId)},
update: { $push: {
recipes : {
[recipe.subcategory] : recipe
}
}},
new: true
}, function(err, doc, lastErrorObject){
if(err){
throw (err)
} else {
//console.log(recipe)
res.render('/success');
}
});
Thank you in advance!
Try with the code belove, If you have any errors please comment them.
db.collection.findOneAndUpdate({
{_id: new ObjectID(userId)},
{ $push: {
recipes : {
[recipe.subcategory] : recipe
}
}},
returnOriginal: false
}, function(err, doc, lastErrorObject){
if(err){
throw (err)
} else {
//console.log(recipe)
res.render('/success');
}
});
Related
I want to update the inner fields of specific questions for a specific exam such as user_answer, isAnswered, etc in the Mongo document below.
Document File for the above image :
{
"_id":{"$oid":"60508fb1c4b07a4134e75644"},
"student_id":"5faaac5d35b7ba4ed406e765",
"exams":[
{"score":null,
"time_taken":null,
"exam_taken":true,
"_id":{"$oid":"60508fb1c4b07a4134e75645"},
"exam_id":"5fbfc8ea9831540072063e62",
"questions":[
{"user_answer":null,
"isAnswered":false,
"isUnanswered":true,
"isFlagged":false,
"_id":{"$oid":"5fbfc8659831540072063e61"}
}
]
}
]
}
I wrote a query for the same but it doesn't work.
try{
await req.db
.collection('result')
.findOneAndUpdate({ student_id: ObjectId("5faaac5d35b7ba4ed406e765"), "exams._id": ObjectId(exam_id),"exams.questions._id":ObjectId(question_id) }, {
$set: {
'questions.$.user_answer': answer,
'questions.$.isAnswered':true,
'questions.$.isUnanswered':false,
'questions.$.isFlagged':false
}
}
);
res.status(201).end();
}catch(e){
console.log(e);
}
Though I am sure there is something wrong with the query itself, I'll highly appreciate it if anyone of you people can tell me how to perform such type of update.
Thank you for the same
Since MongoDB 3.5.12, you can use the update operator with the option arrayFilters to updated nested array elements.
db.collection.update({
"student_id": ObjectId("5faaac5d35b7ba4ed406e765"),
"exams.exam_id": ObjectId("5fbfc8ea9831540072063e62")
},
{
$set: {
"exams.$.questions.$[question].user_answer": "You are the best",
"exams.$.questions.$[question].isAnswered": true,
"exams.$.questions.$[question].isUnanswered": false,
"exams.$.questions.$[question].isFlagged": false
}
},
{
arrayFilters: [
{
"question._id": ObjectId("5fbfc8659831540072063e61")
}
],
multi: true
})
I have a two collection as given below.
Collection 1: List
{
"_id" : ObjectId("5b618589d6edcc135c1aee0a"),
"name" : "ABC",
"special" : "Golmal",
"dim" : "2122",
}
Collection 2: Data
Document 1:
{
"_id" : ObjectId("5b6023d9589ff6bfb5dd75d7"),
"date" : "2018/08/13",
"special" : "Golmal",
}
Document 2:
{
"_id" : ObjectId("5b602447589ff6bfb5dd7606"),
"date" : "2018/08/13",
"special" : "Godman",
}
Here I want compare both the collection and if "special":"Golmal" of Collection 1 is present in Collection 2 documents I want to display/fetch all the related date from Collection 1 document.
I have tried aggregate & $lookup as below
getAvailableList(): Promise<any> {
return this._mongoUtility.Db
.then(db => {
let list= db.collection('list');
let data= db.collection('data');
list.aggregate([{$lookup:
{
from: data,
localField: "special",
foreignField: "special",
as: "matches"
}
},
{
$match: { "matches": { $ne: [{}] } }
}
]);
return Promise.resolve();
})
.catch(err => {
return Promise.reject({message: 'Not found', err: err});
});
}
But I'm getting null.
I have also tied by using .find & forEach as below
let abc = [];
list.find({}).toArray()
.then(arr => {
arr.forEach(obj1 => {
data.find({special: obj1.special}).toArray()
.then(secondArr => {
console.log(secondArr);
if (secondArr.length > 0) {
abc.push(obj1);
}
});
});
});
return Promise.resolve();
But no result. I need value in JSON format. As MongoDB dont have joins. Is there any ways to crack it?
Well, I changed my way of doing that query by not using forEach and its working for me.
I come across $in in find in mongoDB website. Here's the answer
return new Promise((res, rej) => {
this._mongoUtility.Db
.then(db => {
let list= db.collection('List');
let data= db.collection('Data');
data.find({}).toArray()
.then(arr => {
let maps = arr.map(data => data.special);
list.find({special: {$in: maps}}).toArray()
.then(secondArr => {
res(secondArr);
});
});
})
.catch(err => {
return rej({message: 'Not found', err: err});
});
});
As of MongoDB 3.2, joins become possible.
https://www.mongodb.com/blog/post/joins-and-other-aggregation-enhancements-coming-in-mongodb-3-2-part-1-of-3-introduction
In MongoDB, this is the simplified structure of my account document:
{
"_id" : ObjectId("5a70a60ca7fbc476caea5e59"),
"templates" : [
{
"name" : "Password Reset",
"content" : "AAAAAAAA"
},
{
"name" : "Welcome Message",
"content" : "BBBBBB"
}
]
}
There's a similar default_templates collection
let accnt = await Account.findOne({ _id: req.account._id }, { templates: 1 });
let defaults = await DefaultTemplate.find({}).lean();
My goal is to find the missing templates under account and grab them from defaults. (a) I need to upsert templates if it doesn't exist in an account and (b) I don't want to update a template if it already exists in an account.
I've tried the following:
if (!accnt.templates || accnt.templates.length < defaults.length) {
const accountTemplates = _.filter(accnt.templates, 'name');
const templateNames = _.map(accountTemplates, 'name');
Account.update({ _id: req.account._id, 'templates.name' : { $nin: templateNames } },
{ '$push': { 'templates': { '$each' : defaults } } }, { 'upsert' : true },
function(err, result) {
Logger.error('error %o', err);
Logger.debug('result %o', result);
}
);
}
This succeeds at the upsert but it will enter all default templates even if there's a matching name in templateNames. I've verified that templateNames array is correct and I've also tried using $addToSet instead of $push, so I must not understand Mongo subdoc queries.
Any ideas on what I'm doing wrong?
Edit: I've gotten this to work by simply removing elements from the defaults array before updating, but I'd still like to know how this could be accomplished with Mongoose.
You can try with bulkWrite operation in mongodb
Account.bulkWrite(
req.body.accountTemplates.map((data) =>
({
updateOne: {
filter: { _id: req.account._id, 'templates.name' : { $ne: data.name } },
update: { $push: { templates: { $each : data } } },
upsert : true
}
})
)
})
I am trying to query a single embedded document in an array in MongoDB. I don't know what I am doing wrong. Programmatically, I will query this document and insert new embedded documents into the currently empty trips arrays.
{
"_id" : ObjectId("564b3300953d9d51429163c3"),
"agency_key" : "DDOT",
"routes" : [
{
"route_id" : "6165",
"route_type" : "3",
"trips" : [ ]
},
{
"route_id" : "6170",
"route_type" : "3",
"trips" : [ ]
},
...
]
}
Following queries -I run in mongo shell- return empty:
db.tm_routes.find( { routes : {$elemMatch: { route_id:6165 } } } ).pretty();
db.tm_routes.find( { routes : {$elemMatch: { route_id:6165,route_type:3 } } } ).pretty();
db.tm_routes.find({'routes.route_id':6165}).pretty()
also db.tm_routes.find({'routes.route_id':6165}).count() is 0.
The following query returns every document in the array
db.tm_routes.find({'routes.route_id':'6165'}).pretty();
{
"_id" : ObjectId("564b3300953d9d51429163c3"),
"agency_key" : "DDOT",
"routes" : [
{
"route_id" : "6165",
"route_type" : "3",
"trips" : [ ]
},
{
"route_id" : "6170",
"route_type" : "3",
"trips" : [ ]
},
...
]}
but db.tm_routes.find({'routes.route_id':'6165'}).count() returns 1.
And finally, here is how I inserted data in the first place -in Node.JS-:
async.waterfall([
...
//RETRIEVE ALL ROUTEIDS FOR EVERY AGENCY
function(agencyKeys, callback) {
var routeIds = [];
var routesArr = [];
var routes = db.collection('routes');
//CALL GETROUTES FUNCTION FOR EVERY AGENCY
async.map(agencyKeys, getRoutes, function(err, results){
if (err) throw err;
else {
callback(null, results);
}
});
//GET ROUTE IDS
function getRoutes(agencyKey, callback){
var cursor = routes.find({agency_key:agencyKey});
cursor.toArray(function(err, docs){
if(err) throw err;
for(i in docs){
routeIds.push(docs[i].route_id);
var routeObj = {
route_id:docs[i].route_id,
route_type:docs[i].route_type,
trips:[]
};
routesArr.push(routeObj);
/* I TRIED 3 DIFFERENT WAYS TO PUSH DATA
//1->
collection.update({agency_key:agencyKey}, {$push:{"routes":{
'route_id':docs[i].route_id,
'route_type':docs[i].route_type,
'trips':[]
}}});
//2->
collection.update({agency_key:agencyKey}, {$push:{"routes":routeObj}});
*/
}
// 3->
collection.update({agency_key:agencyKey}, {$push:{routes:{$each:routesArr}}});
callback(null, routeIds);
});
};
},
...
var collection = newCollection(db, 'tm_routes',[]);
function newCollection(db, name, options){
var collection = db.collection(name);
if (collection){
collection.drop();
}
db.createCollection(name, options);
return db.collection(name);
}
Note: I am not using Mongoose and don't want to use if possible.
Melis,
I see what you are asking for, and what you need is help understanding how things are stored in mongodb. Things to understand:
A document is the basic unit of data for MongoDB and can be roughly compared to a row in a relational database.
A collection can be thought of as a table with a dynamic schema
So documents are stored in collections.Every document has a special _id, that is unique within a collection. What you showed us above in the following format is One document.
{
"_id" : ObjectId("564b3300953d9d51429163c3"),
"agency_key" : "DDOT",
"routes" : [
{
"route_id" : "6165",
"route_type" : "3",
"trips" : [ ]
},
{
"route_id" : "6170",
"route_type" : "3",
"trips" : [ ]
},
...
]}
If you run a query in your tm_routes collection. The find() will return each document in the collection that matches that query. Therefore when you run the query db.tm_routes.find({'routes.route_id':'6165'}).pretty(); it is returning the entire document that matches the query. Therefore this statement is wrong:
The following query returns every document in the array
If you need to find a specific route in that document, and only return that route, depending on your use, because its an array, you may have to use the $-Positional Operator or the aggregation framework.
For Node and Mongodb users using Mongoose, this is one of the ways to write the query to the above problem:
db.tm_routes.updateOne(
{
routes: {
$elemMatch: {
route_id: 6165 (or if its in a route path then **6165** could be replaced by **req.params.routeid**
}
}
},
{
$push: {
"routes.$.trips":{
//the content you want to push into the trips array goes here
}
}
}
)
my schema looks like this:
var exampleSchema = newSchema({
profile:{
experience :[{
exp : String
}]
}
});
this is the codes to update experience in profile collection:
exampleSchema.statics.experience = function (id,experience, callback){
var update = {
$push: {
'profile.experience': experience
}
}
this.findByIdAndUpdate(id,update,function(err) {
if (err) {
callback(err);
} else {
callback(null);
}
})
I was getting error like The field 'profile.experience' must be an array but is of type String in document {_id: ObjectId('5653f1d852cf7b4c0bfeb54a')}[object Object]
console.log(experience) is equal to
{ exp: 'jlkjlkjlk' }
my collection should look like this:
experience:[
{
exp : "YYYY"
},
{
exp:"xxxx"}
]
Imagine that you have this collection:
/* 1 */
{
"_id" : ObjectId("565425e862760dfe14339ba8"),
"profile" : {
"experience" : [
{
"exp" : "Experto"
}
]
}
}
/* 2 */
{
"_id" : ObjectId("565425f562760dfe14339ba9"),
"profile" : {
"experience" : {
"exp" : "Experto"
}
}
}
/* 3 */
{
"_id" : ObjectId("5654260662760dfe14339baa"),
"profile" : {
"experience" : "Experto"
}
}
If you try (update doc /* 2 */):
db.profile.update(
{ _id: ObjectId("565425f562760dfe14339ba9") },
{ $push: { "profile.experience" : { exp : "Intermediate" } } }
)
You get this error:
The field 'profile.experience' must be an array but is of type Object
in document {_id: ObjectId('565425f562760dfe14339ba9')}
And if you try (update doc /* 3 */):
db.profile.update(
{ _id: ObjectId("5654260662760dfe14339baa") },
{ $push: { "profile.experience" : { exp : "Intermediate" } } }
)
You will get:
The field 'profile.experience' must be an array but is of type String
in document {_id: ObjectId('5654260662760dfe14339baa')}
i changed Schema like this
experience : [{type:String,exp:String}],
my update object looks like this
var update = {
$push: {
'profile.experience': san.exp
}
};
san looks like this :{ exp: 'YYY' }
Inside mongoose collectionlooks like this used RoboMongo
"experience" : [
"experienced in XXX",
"YYY"
],
$push: {
'profile.experience': experience
}
Remove .exp.
First you have to check you declared your field as an array like this(look at field products):
shop = {
'name': "Apple Store",
'description': "",
'direction': "",
'contact': "",
'products':[]
}
Now if you want to add something to the field products using $push
product = {
'name': "Iphone 6",
'description': "Iphone model 6, 64GB",
'price': 700,
'count': 3
}
myquery = { "name" : "Apple Store" }
obj ={"$push":{"products":{"$each": [product]}}}
db.collection.update_one(myquery,obj)
This code is provided for PyMongo framework. To use in MongoDB directly replace update_one by update. Mongo resource
You may use $set instead of $push which might work.
$set: {
'profile.experience': experience
}
are you searching for adding multiple values into single field then use this one.
write this one your model or schema:
arrayremarks:[{remark: String}]
then write in your controller:
module.exports.addingremarks = (req, res) => {
let casenum=JSON.parse(JSON.stringify(req.body.casenum).replace(/"\s+|\s+"/g,'"'))
var rem={remark:"Suman macha"}
Inwart.update( { 'casenum': casenum },{ $push: { arrayremarks:rem} } ,function (err, inwarts) {
if (err)
return console.error(err);
res.send(inwarts);
}
)
}