I have a model in mongoose
'use strict';
var mongoose = require('bluebird').promisifyAll(require('mongoose'));
var Schema = mongoose.Schema;
function toLower (v) {
return v.toLowerCase();
}
var Signup = new Schema({
name: { type: String, required: true },
email: { type: String, unique: true, required: true, set: toLower },
position: { type: String },
area: String,
companySize: Number,
created: { type: Date, default: Date.now }
});
module.exports = mongoose.model('Signup', Signup);
I would like to group by created (date formatted to day) and count the number of _ids.
I'm new to mongoose and bluebird... Could anyone provide me with an example? Thx!!!
I managed to get exactly what I wanted:
SignupModel
.aggregate([
{
$group: {
_id: { $week: "$created" },
"count": { "$sum": 1 }
}
}
])
.execAsync()
.then(responseWithResult(res))
.catch(handleError(res));
=> Groups by created (week) and sums them
Related
i have 2 schemas
const schema = mongoose.Schema(
{
id_film: {
type: Number,
unique: true,
require: true,
trim: true,
},
recommendation: [{
type: Number,
ref: 'Films'
}]
}, { timestamps: true }, { _id: false }
);
export const Recommendation = mongoose.model("Recommendations", schema);
const schema = mongoose.Schema(
{
name:{
type: String,
}
id: {
type: Number,
ref: 'Recommendations'
},
}
export const Films = mongoose.model("Films", schema);
the recommendation contains a list id of model Films, and I want to show all id film
i try it
Recommendation.findOne({ id_film: req.params.id }).populate('recommendation').exec(function (err, film) {
if (err) return handleError(err);
res.json(film);
});
but it's not working, it just shows the list id not id and name
I am trying the aggregation in mongoose. When I run that aggregation, it show the error. What am I missing?
const data = await Rooms.aggregate([{ $match: { adminID: "1234" } }]);
Error is like that
MongoInvalidArgumentError: Method "collection.aggregate()" accepts at most two arguments
Edit -- code for Rooms Schema
const mongoose = require('mongoose');
const Rooms = new mongoose.Schema(
{adminID: {
type: String,
required: true,
},
roomID: {
type: String,
required: true,
},
roomName: {
type: String,
required: true,
},
users: [
{
id: {
type: String,
required: true,
unique: true,
},
},
],
},
{ timestamps: true } );
module.exports = mongoose.model("rooms", Rooms);
solution 1 : downgrade mongoose to version 5
solution 2 :
const data = await Rooms.aggregate([{ $match: { adminID: "1234" } }],"adminID roomID roomName users");
in new version second argument is selected fields in out put,
or use :
const data = await Rooms.aggregate.match({ adminID: "1234" } )
I have this document in mongo atlas
_id: 5f8939cbedf74e363c37dd86,
firstname: "Person",
lastname: "Person lastname",
sex: "Masculino",
age: "20",
birthDay: 2020-10-07T00:00:00.000+00:00,
vaccines: Array
0:Object
dose: Array
_id: 5f8939cbedf74e363c37dd87
vaccine:5f7023ad96f7ed21e85be521
createdAt:2020-10-16T06:12:27.726+00:00
updatedAt:2020-10-16T06:12:27.726+00:00
1:Object
dose:Array
_id:5f893a9ca98e97188c93fea8
vaccine:5f70259796f7ed21e85be523
2:Object
dose:Array
_id:5f893acda98e97188c93fea9
vaccine:5f7023ad96f7ed21e85be521
This is my mongoose schema
const mySchema = new Schema({
firstname: {
type: String,
required: true,
},
lastname: {
type: String,
required: true,
},
sex: {
type: String,
required: true,
},
age: {
type: String,
required: true,
},
birthDay: {
type: Date,
required: true,
},
vaccines: [
{
type: new Schema(
{
vaccine: {
type: Schema.ObjectId,
ref: "Vaccine",
},
dose: Array,
},
{ timestamps: true }
),
},
],
});
every time I add a new person the vaccines array gets one new object with the timestamp as you can see, in my js file I use this code:
const addPerson = (person) => {
const myPerson= new Model(person);
return myPerson.save();
};
Then when I add a new vaccine for the same person this does not get the timestamp, I'm using this code for that:
const addPersonVaccine = async ({ params, body }) => {
if (!params) return Promise.reject("Invalid ID");
const vaccines = [body];
const foundPerson = await Model.updateOne(
{
_id: params,
},
{
$push: {
vaccines: vaccines,
},
}
);
return foundPerson;
};
This is what my body inside vaccines array has:
[ { vaccine: '5f72c909594ee82d107bf870', dose: 'Primera' } ]
The problem is that I have no results about the next timestamps, as you can see in my mongo atlas document:
1:Object
dose:Array
_id:5f893a9ca98e97188c93fea8
vaccine:5f70259796f7ed21e85be523
2:Object
dose:Array
_id:5f893acda98e97188c93fea9
vaccine:5f7023ad96f7ed21e85be521
Is that the best way to implement timestamps in subdocuments or sub schemas?
I will appreciate your answers, thnks 👏
You can use mongoose schema timestamps options to the inner schemas
const mongoose = require("mongoose");
const forumSchema = new mongoose.Schema(
{
title: { type: String, required: true },
biddings: [
{
type: new mongoose.Schema(
{
biddingId: String,
biddingPoints: Number
},
{ timestamps: true }
)
}
]
},
{ timestamps: true }
);
const Forum = mongoose.model("Forum", forumSchema);
module.exports = Forum;
for more Mongoose schema set timestamp on nested document
I defined two schema in mongoose: DocSchema has DocTypeSchema reference.
const DocTypeSchema = new Schema({
name: { type: String, unique: true, index: true }
});
export const DocType = mongoose.model('Doc-Type', DocTypeSchema);
const DocSchema = new Schema(
{
name: { type: String },
type: { type: Schema.Types.ObjectId, ref: 'Doc-Type' },
description: { type: String },
}
);
When I try to get the docs with type by the name I gets empty results.
How can I solve this?
docs.find({ 'type.name': 'VideoBook' }, { limit: 30 })
I don't want to get the type object inside the docs array. just to gets the docs that match to the query.
You need tu user .aggregate
Specify the collection:
const DocTypeSchema = new Schema({
name: { type: String, unique: true, index: true }
},{ collection: 'docType' });
Simple example :
const docs = await Doc.aggregate([
{
$lookup: {
from: 'docType',
localField: 'type',
foreignField: 'name',
as: 'magic'
}
},
{$unwind: '$magic'},
{
$match: {
$and: {
"magic.name": 'VideoBook'
}
}
},
{ $limit : 30 }
])
I have a item model where it a virtual field to refer stock badges.
'use strict';
const mongoose = require('mongoose');
const mongooseHidden = require('mongoose-hidden')();
const Badge = mongoose.model('Badge');
const validateProperty = function(property) {
return (property.length);
};
const Schema = mongoose.Schema;
const ItemSchema = new Schema({
itemCode: {
type: Number,
index: {
unique: true,
sparse: true // For this to work on a previously indexed field, the index must be dropped & the application restarted.
},
required: true
},
itemName: {
type: String,
uppercase: true,
trim: true
},
barcode: {
type: String,
trim: true
},
category: {
type: Schema.Types.ObjectId,
ref: 'Category'
},
subCategory: {
type: Schema.Types.ObjectId,
ref: 'SubCategory'
},
updated: {
type: Date
},
created: {
type: Date,
default: Date.now
},
status: {
type: String,
enum: [
'active', 'inactive', 'removed'
],
default: 'active'
}
}, {id: false});
ItemSchema.virtual('badges').get(function() {
return this.getAvailableBadges();
});
ItemSchema.methods.getAvailableBadges = function() {
Badge.find({
item: this._id
}, (err, badges) => {
if (badges) {
return badges;
} else {
return [];
}
});
};
ItemSchema.set('toJSON', {virtuals: true});
ItemSchema.set('toObject', {virtuals: true});
ItemSchema.plugin(mongooseHidden, {
hidden: {
_id: false,
__v: true
}
});
mongoose.model('Item', ItemSchema);
And batch model as below
'use strict';
const mongoose = require('mongoose');
const mongooseHidden = require('mongoose-hidden')();
const validateProperty = function(property) {
return (property.length);
};
const Schema = mongoose.Schema;
const BadgeSchema = new Schema({
item: {
type: Schema.Types.ObjectId,
ref: 'Item'
},
qty: {
type: Number,
validate: [validateProperty, 'Please enter Quantity !']
},
purchasingPrice: {
type: Number,
validate: [validateProperty, 'Please enter purchasingPrice !']
},
sellingPrice: {
type: Number,
validate: [validateProperty, 'Please enter sellingPrice !']
},
updated: {
type: Date
},
created: {
type: Date,
default: Date.now
},
status: {
type: String,
enum: [
'active', 'inactive', 'removed'
],
default: 'active'
}
});
BadgeSchema.plugin(mongooseHidden, {
hidden: {
_id: false,
__v: true
}
});
mongoose.model('Badge', BadgeSchema);
Item's badge virtual field doesn't got populated.
How are we going to work with async getter method
I have put some console log statements and found that getAvailableBadges is getting data.
I need to send json object with virtual field values via express. How to I do it?
What I did was create an virtual property
ItemSchema.virtual('badges', {
ref: 'Badge',
localField: '_id',
foreignField: 'item'
});
And populate it with
{
path: 'badges',
select: [
'qty', 'purchasingPrice', 'sellingPrice'
],
options: {
sort: {
'created': -1
}
}
}
Well, the operations are asynchronous so you have to wait for the callback to fire.
You can only return the values by passing it in the callback (or you can set the values of the current object prior to calling the callback).
I think it would be something like this:
ItemSchema.virtual('badges').get(function (callback) {
Badge.find({ item: this._id }, callback);
};
Then you would use it like
item.badges(function (err, badges) {
// do something with badges
});