I have taken this schema from Here
var mongoose = require('mongoose');
var ContactSchema = module.exports = new mongoose.Schema({
name: {
type: String,
required: true
},
phone: {
type: Number,
required: true,
index: {unique: true}
},
messageCount: {
type: Number,
required: true,
default:0
},
messages: [
{
title: {type: String, required: true},
msg: {type: String, required: true}
}]
}, {
collection: 'contacts',
safe: true
});
I can push message by doing this
let result = await Contact.findByIdAndUpdate(
id,
{$push: {"messages": {title: title, msg: msg}}},
{new : true})
But I want to increase messageCount also in single step where
messageCount can be random also but point is to push and update
I am expecting both message and messageCount to update in single query using any mongoose functions
After Looking to This Post and tried on my doubt
let result = await Contact.findByIdAndUpdate(
id,
{
messageCount:10
$push: {"messages": {title: title, msg: msg}}
},
{
new : true
}
)
Related
MongooseError: Cannot populate path loaned_to because it is not in your schema. Set the strictPopulate option to false to override.
I've tried to join two documents in mongodb using mongoose in nodejs, But unfortunately this error occurs. My mongoose version is 6.0.6
Book Schema
const mongoose = require('mongoose');
const BookSchema = new mongoose.Schema({
"name": {type: String, required: true},
"author_name": {type: String, required: true},
"published_date": {type: Date, required: false},
"copies": [
{
"isbn_number": {type: String, required: true},
"status": {type: String, required: true, default: "Available"},
"due_back": {type: Date, required: false},
"loaned_to": {type: mongoose.Schema.Types.ObjectId, required: false, ref: "User"}
},
]
})
const Book = mongoose.model("Book", BookSchema);
module.exports = Book;
User Schema
const mongoose = require('mongoose');
const UserSchema = new mongoose.Schema({
"first_name": {type: String, required: true},
"last_name": {type: String, required: true},
"phone_number": {type: String, required: true},
"address": {type: String, required: false},
"user_name":{type: String, required: true},
"password": {type: String, required: true},
"email": {type: String, required: true},
"notifications": [
{
"notification_id" : {type:"string", required:true},
"notification": {type: "string", required: true}
},
]
})
const User = mongoose.model("User", UserSchema);
module.exports = User;
My code to join documents
exports.getAllBooks = async (req, res) => {
try {
let data = await BookModel.findOne().populate("loaned_to");
res.status(200).send({data: [...data], success: true})
} catch (err) {
console.log(err)
res.status(404).send({success: false, msg: err.message})
}
}
exports.getAllBooks = async (req, res) => {
try {
let data = await BookModel.findOne().populate({
path: 'copies.loaned_to',
select:
'first_name lastName phone_number address user_name email notifications',
});
res.status(200).json({ data: [...data], success: true });
} catch (err) {
console.log(err);
res.status(500).json({ success: false, msg: err.message });
}
};
Use nested populate as in the example below(The example assumes that a Token model has a user which in tern has a role and a role has permissions).
This will return a user object associated with the filtered token, with the role the user is assigned to and the permissions assigned to the role.
That is: TokenModel (has relationship to) -> UserModel (has relationship to) -> RoleModel (has relationship to) -> PermissionsModel)
const popObj = {
path: 'user',
options: { sort: { position: -1 } },
populate: {
path: 'role',
select: 'name',
populate: {
path: 'permissions'
}
}
};
const tokenFilter = {is_active: true};
TokenModel.find(userFilter).populate(popObj);
I am new to the backend and trying to learn by building some stuff but unfortunately, I got stuck.
I want to know if I can update a nested array of objects in Users Schema using Mongoose in an efficient and elegant way.
Users Schema:
const mongoose = require('mongoose');
const Schema = mongoose.Schema;
const UserSchema = new Schema({
name: {
type: String,
required: true
},
username: {
type: String,
required: true,
unique: true
},
email: {
type: String,
required: true,
unique: true
},
gender: {
type: String,
required: true
},
password: {
type: String,
required: true
},
friends: [{}],
notifications: []
}, {timestamps: true});
module.exports = User = mongoose.model('user', UserSchema);
In the friends' field, I stored friend request with the status of pending
I want if the user whose the request was sent to, hits an endpoint, to accept the request
by changing the status from pending to success.
This is how a friend request was stored:
friendRequest = {
_id: req.user.id,
status: 'pending',
sentByMe: false,
new: true,
inbox: []
}
Thanks as you help me out!!! 🙏🙏🙏
You should first create an additional friendRequest and inbox schemas like this:
var mongoose = require('mongoose');
var Schema = mongoose.Schema;
const InboxSchema = new Schema({
user_id: {
type: String,
required: true
},
from_id: {
type: String,
required: true
},
message: {
type: String,
required: true
},
the_date_time: {
type: Date,
required: true
}
});
mongoose.model('Inbox', InboxSchema);
const FriendRequestSchema = new Schema({
user_id: {
type: String,
required: true
},
status: {
type: String,
required: true
},
sentByMe: {
type: Boolean,
required: true,
unique: true
},
inbox: [InboxSchema]
})
mongoose.model('FriendRequests', FriendRequestSchema);
and update your Users schema:
const UserSchema = new Schema({
name: {
type: String,
required: true
},
username: {
type: String,
required: true,
unique: true
},
email: {
type: String,
required: true,
unique: true
},
gender: {
type: String,
required: true
},
password: {
type: String,
required: true
},
friends: [FriendSchema],
notifications: [FriendRequestSchema]
}, {timestamps: true});
And then use the friendRequest object
friendRequest = {
_id: req.user.id,
status: 'pending',
sentByMe: false,
new: true,
inbox: []
}
to update the Users collection
Users.update({ _id: user_id }, { $push: { notifications: friendRequest } });
Whenever you have arrays of objects within collections, its best to define additional schemas. You should also consider adding indexes to your collection schemas.
Update:
A FriendSchema would look like this:
const FriendsSchema = new Schema({
friend_id: {
type: String,
required: true
},
friend_name: {
type: String,
required: true
},
friendship_made: {
type: Date,
required: true
}
// you have to define FriendSchema before you define Users since you
// now reference [FriendSchema] in UserSchema
mongoose.model('Friends', FriendSchema);
And so is personA friends with personB?
Users.findOne({ "_id": personA.id, "friends.friend_id": personB.id});
Im relatively new to MongoDB and Mongoose. Im much used to MySQL so in used to inner joining tables on calls. Ive read a lot that you can link two Mongoose Schemas to achieve the same outcome. How would like like the two schemas together to when I make a call to get a chore by id it'll return the chore and then for the assignedTo & createdBy have the user scheme data for the said userId?
Chore Schema
var mongoose = require('mongoose');
var Schema = mongoose.Schema;
var ChoreSchema = new Schema({
title: {
type: String,
required: true
},
desc: {
type: String,
required: true
},
time: {
type: Number,
required: true
},
reaccurance: {
type: [{
type: String,
enum: ['Daily', 'Weekly', 'Bi-Weekly', 'Monthly']
}]
},
reward: {
type: Number,
required: true
},
retryDeduction: {
type: Number,
required: false
},
createdDate: {
type: Date,
default: Date.now
},
createdBy: {
type: String,
required: true
},
dueDate: {
type: Date,
required: true
},
status: {
type: [{
type: String,
enum: ['new', 'pending', 'rejected', 'completed', 'pastDue']
}],
default: ['new']
},
retryCount: {
type: Number,
default: 0,
required: false
},
rejectedReason: {
type: String,
required: false
},
familyId: {
type: String,
required: true
},
assignedTo: {
type: String,
required: false,
default: ""
}
});
let Chores = module.exports = mongoose.model('Chores', ChoreSchema);
module.exports.get = function (callback, limit) {
Chores.find(callback).limit(limit);
};
User Schema
var mongoose = require('mongoose');
var Schema = mongoose.Schema;
var UserSchema = new Schema({
firstName: {
type: String,
required: true
},
lastName: {
type: String,
required: true
},
role: {
type: [{
type: String,
enum: ['Adult', 'Child']
}]
},
birthday: {
type: String,
required: false
},
familyId: {
type: String,
required: true
},
balance: {
type: Number,
required: true,
default: 0.00
}
});
let Users = module.exports = mongoose.model('Users', UserSchema);
module.exports.get = function (callback, limit) {
Users.find(callback).limit(limit);
};
Im trying to link ChoreSchema.createdBy & ChoreScheme.assignedTo by UserSchema._id
How I make the call in Node.js:
exports.index = function(req, res) {
Chore.get(function(err, chore) {
if (err)
res.send(err);
res.json({
message: 'Chore List',
data: chore
});
});
};
Mongoose has a more powerful alternative called populate(),
which lets you reference documents in other collections.
https://mongoosejs.com/docs/populate.html
Here is how you can link ChoreSchema.createdBy and ChoreScheme.assignedTo by UserSchema._id
var mongoose = require('mongoose');
const { Schema, Types } = mongoose;
var UserSchema = new Schema({
firstName: { type: String, required: true },
...
})
var ChoreSchema = new Schema({
title: { type: String, required: true },
...
//The ref option is what tells Mongoose which model to use during population
assignedTo: { type: Types.ObjectId, ref: 'Users' },
createdBy: { type: Types.ObjectId, ref: 'Users' },
})
let Chores = mongoose.model('Chores', ChoreSchema);
let Users = mongoose.model('Users', UserSchema);
Then in your express route handler you can populate assignedTo & createdBy like this
router.get('/chores/:id', function (req, res) {
const choreId = req.params.id;
Chores.find({ _id: choreId })
.populate('createdBy') // populate createdBy
.populate('assignedTo') // populate assignedTo
.exec(function (err, chore) {
if(err) {
return res.send(err)
}
res.json({ message: 'Chore List', data: chore });
});
})
I am trying to create a chat with node.js, Express & MongoDB. I have two mongoose models: for chat room and message.
Room model:
const RoomSchema = new mongoose.Schema({
name: {
type: String,
required: true,
},
owner: {
type: mongoose.Schema.Types.ObjectId,
ref: 'Users',
required: true,
},
messages: {
type: [mongoose.Schema.Types.ObjectId],
ref: 'Messages',
required: true,
},
users: {
type: [mongoose.Schema.Types.ObjectId],
ref: 'Users',
required: true,
},
});
const Room = mongoose.model('Rooms', RoomSchema);
Message model:
const MessageSchema = new mongoose.Schema({
text: {
type: String,
required: true,
},
sendBy: {
type: String,
required: true
}
});
const Messages = mongoose.model('Messages', MessageSchema);
and a function for displaying all messages
prepareMessages: function (name, callback) {
rooms.findOne({
name: name,
}).populate('messages')
.exec(function (err, room) {
let result = '';
if (!room) {
console.log("Chat does not exist");
throw err;
}
else {
room.messages.forEach(function (item, i, arr) {
result += '<dt>' + item.sendBy + '</dt>';
result += '<dd>' + item.text + '</dd>';
});
}
callback(result)
});
},
Why do I get
TypeError: Cannot read property 'sendBy' of undefined?
I tried .populate('rooms.messages'), .populate({path: 'rooms.messages', model:'Messages') and another variants, but it still doesn't work. Help me, please!
In the Room Schema, you're defining the messages as an object with type of Array of ObjectId, while it should be an array of elements, each element is of type ObjectId, messages should be an array of ObjectIds, and users as well
const RoomSchema = new mongoose.Schema({
name: {
type: String,
required: true,
},
owner: {
type: mongoose.Schema.Types.ObjectId,
ref: 'Users',
required: true,
},
messages: [{ // note here messages is an array
type: mongoose.Schema.Types.ObjectId,
ref: 'Messages',
required: true,
}],
users: [{
type: mongoose.Schema.Types.ObjectId,
ref: 'Users',
required: true,
}],
});
const Room = mongoose.model('Rooms', RoomSchema);
hope it helps
sendBy should be of type ObjectId
const MessageSchema = new mongoose.Schema({
text: {
type: String,
required: true,
},
sendBy: {
type: mongoose.Schema.Types.ObjectId,
required: true
}
});
const Messages = mongoose.model('Messages', MessageSchema);
ref should be in lowercase.
ref: 'Users', should be changed to ref:'users'
Similarly at all other refs
I'm completely new to the NoSQL world and it's been difficult to wrap my mind around it. This week I was learning MongoDB (Mongoose) with Node.js and here is my current schema:
var eventDataSchema = new Schema({
_id : Number,
notes : {type: String, required: true},
start_date : {type: Date, required: true},
end_date : {type: Date, required: true},
}, {
id : false,
collection : 'event-data'
});
eventDataSchema.plugin(AutoIncrement);
var EventData = mongoose.model('EventData', eventDataSchema);
Now that this is working, I would like to add a user and password and have access to have personal access to EventData.
Also... later if I want to send a JSON of only the eventData, but not the user to my javascript, how would I do that?
The way I am currently sending my eventData to my js in this format:
router.get('/data', function(req, res){
EventData.find({}, function(err, data){
if (err) {
console.error('Error occured');
}
res.send(data);
});
});
Thanks again
As i can understand you want to add events key in your schema. Then your schema will be like that:
var userSchema = new Schema({
user: { type: String, required: true, trim: true },
password: { type: String, required: true, trim: true },
events: [{
notes: { type: String,required: true, trim: true },
start_date: { type: Date,required: true },
end_date: { type: Date,required: true }
}]
}
userSchema.plugin(AutoIncrement);
var userSchema = mongoose.model('userSchema', userSchema);
});
If the above code is not working then you can create two schema,one for user and other for eventData, and can populate your eventData in userSchema.
so your code will be like that:
userSchema.js:
var userSchema = new Schema({
user: { type: String, required: true, trim: true },
password: { type: String, required: true, trim: true },
events: {type: mongoose.Schema.Types.ObjectId, ref: 'EventData' }
userSchema.plugin(AutoIncrement);
module.exports = mongoose.model('userSchema', userSchema);
});
And your eventDataSchema will be:
eventSchema.js:
var eventDataSchema = new Schema({
notes: { type: 'string',required: true, trim: true },
start_date: { type: Date,required: true },
end_date: { type: Date,required: true }
}
eventDataSchema.plugin(AutoIncrement);
module.exports = mongoose.model('EventData', eventDataSchema);
});
and then you can get the result like that:
index.js:
var eventSchema = require('./eventSchema');
var userSchema = require('./userSchema');
var populate = [{
path: 'events',
model: 'EventData',
select: '_id notes start_dat end_date'
}];
var find = function (query) {
return userSchema.find(query).populate(populate).exec();
}
console.log(find());
Result:
{
_id:cfgvhbjnkmkdcfxghgjklxnmbxhdhjxjhjhgx,
user: John Doe,
password: 123,
events: [ { _id: 1gfye56785g3ycgevhxeftx568765egcd,
notes: Event A,
start_date: 1/1/01,
end_date: 1/1/01
} ]
}