Tried to insert auto increment number for serial number in mongodb using mongoose and nodejs but not working.Where i want to update my code to find solution.If anyone knows please help to find solution.
subs.model.js:
const mongoose = require('mongoose');
var subscriberSchema = new mongoose.Schema({
_id: {type: String, required: true},
email: {
type: String
}
}, {
versionKey: false,
collection: 'subscribers'
});
module.exports = mongoose.model('Subscribers', subscriberSchema);
data.controller.js:
module.exports.subscribeMail = (req, res, next) => {
var subscribeModel = mongoose.model("Subscribers");
var subscribemailid = req.query.email;
var subscribe = new subscribeModel({
email: subscribemailid
});
var entitySchema = mongoose.Schema({
testvalue: { type: String }
});
subscribe.save(function(error, docs) {
if (error) { console.log(error); } else {
console.log("subscribe mail id inserted");
console.log(docs)
res.json({ data: docs, success: true });
}
});
entitySchema.pre('save', function(next) {
var doc = this;
subscribe.findByIdAndUpdate({ _id: 'entityId' }, { $inc: { seq: 1 } }, function(error, counter) {
if (error)
return next(error);
doc.testvalue = counter.seq;
next();
});
});
};
If i use above code inserting data into mongodb like below:
_id:5f148f9264c33e389827e1fc
email:"test#gmail.com"
_id:6f148f9264c33e389827e1kc
email:"admin#gmail.com"
But i want to insert like this
_id:5f148f9264c33e389827e1fc
serialnumber:1
email:"test#gmail.com"
_id:6f148f9264c33e389827e1kc
serialnumber:2
email:"admin#gmail.com"
You can use this plugin: https://www.npmjs.com/package/mongoose-auto-increment
First you need to initialize it after creating Mongoose connection:
const connection = mongoose.createConnection("mongodb://localhost/myDatabase");
autoIncrement.initialize(connection);
Than in your subs.model.js file:
const mongoose = require('mongoose');
const autoIncrement = require('mongoose-auto-increment');
var subscriberSchema = new mongoose.Schema({
_id: {type: String, required: true},
email: {
type: String
}
}, {
versionKey: false,
collection: 'subscribers'
});
subscriberSchema.plugin(autoIncrement.plugin, {
model: 'Subscribers',
field: 'serialnumber'
});
module.exports = mongoose.model('Subscribers', subscriberSchema);
Related
my model(cart.js)
const mongoose = require('mongoose');
const Schema = mongoose.Schema
var cartSchema = new Schema({
prodId: { type: Number },
img: { type: String },
qnt: { type: Number },
amt: { type: Number },
name: { type: String },
address: {type: String}
})
module.exports = mongoose.model('cart', cartSchema,'carts');
=====>
my routes(cart.js):
router.post('/', (req, res) => {
let cartData = req.body
let cart = new Cart(cartData)
console.log(req.body)
cart.save((error, cart) => {
if(error){
console.log("Error: "+ error)
}
else{
res.status(200).send(cart)
}
})
})
there is no error in console .everything is fine but getting only _id,_v in database.
what is wrong ?please help me.
thanks in advance
I have two schema,
const mongoose = require("mongoose");
const Schema = mongoose.Schema;
// Create the User Schema
const UserSchema = new Schema({
email: {
type: String
},
password: {
type: String
}
});
module.exports = User = mongoose.model("users", UserSchema);
OR
const mongoose = require("mongoose");
const Schema = mongoose.Schema;
// Create the Status Schema
const StatusSchema = new Schema({
admin_id:{
type: Schema.Types.ObjectId,
ref: 'users'
},
text:{
type: String
},
});
module.exports = Status = mongoose.model("Status", StatusSchema, "Status");
then i use the populate in my api route:
router.get(
"/",
passport.authenticate("jwt", {
session: false,
}),
(req, res) => {
try {
Status.find({}).populate('admin_id').exec(err, data=>{
console.log(data); // return a blank array : []
return res.sendStatus(200)
})
}
} catch (error) {
res.sendStatus(500);
}
}
);
When i call this route i got an empty array [] .... Any idea what i do wrong? I should mention that i have inserted records in status collection for both admin_id
Is there any onther way to do this ?
There is a lot of ways to do this.
You sould use this,
Status.find({}).then((doc) => {
if (doc) {
Status.populate(doc, { path: "admin_id", model: "users" }, function (
err,
data
) {
if (err) throw err;
console.log(data); //here is your documents with admin user
});
}
});
I'm following this video series.
Here i have problem with getting data about user who created the event in following script
here's my app.js
const express = require('express');
const bodyParser = require('body-parser');
const graphqlHttp = require('express-graphql')
const { buildSchema } = require('graphql');
const mongoose = require('mongoose');
const bcrypt = require('bcrypt');
const Event = require('./models/event');
const User = require('./models/user');
const app = express();
const conString = `mongodb+srv://${process.env.MONGO_USER}:${process.env.MONGO_PASSWORD}#clusterpl-qiufl.mongodb.net/${process.env.MONGO_DB}?retryWrites=true&w=majority`
app.use(bodyParser.json());
app.use(
'/graphql',
graphqlHttp({
schema: buildSchema(`
type Event {
_id: ID!
title: String!
description: String!
price: Float!
date: String!
creator: User!
}
type User {
_id: ID!
email: String!
password: String!
createdEvents: [Event!]
}
input UserInput {
email: String!
password: String!
}
input EventInput {
title: String!
description: String!
price: Float!
date: String!
}
type RootQuery {
events: [Event!]!
}
type RootMutation {
createEvent(eventInput: EventInput): Event
createUser(userInput: UserInput): User
}
schema {
query: RootQuery,
mutation: RootMutation
}
`) ,
rootValue: {
events: () => {
return Event.find().populate('creator')
.then(events => {
console.log(events)
return events.map(event => {
console.log(event)
return {
...event._doc,
_id: event.id
};
});
})
.catch(err => {
throw err;
})
},
..
},
graphiql: true
})
);
mongoose.connect(conString, {useNewUrlParser: true}).then(
() => {console.log('Success !')},
err => { console.log(err) }
)
app.listen(3000);
user.js and event.js
const mongoose = require('mongoose');
const Schema = mongoose.Schema;
const userSchema = new Schema({
email: {
type: String,
required: true
},
password: {
type: String,
required: true
},
createdEvents: [
{
type: Schema.Types.ObjectId,
ref: 'Event'
}
]
});
module.exports = mongoose.model('User', userSchema)
const mongoose = require('mongoose');
const Schema = mongoose.Schema
const eventSchema = new Schema({
title: {
type: String,
required: true
},
description: {
type: String,
required: true
},
price: {
type: Number,
required: true
},
date: {
type: Date,
required: true
},
creator: [
{
type: Schema.Types.ObjectId,
ref: 'User'
}
]
});
module.exports = mongoose.model('Event', eventSchema);
once i submit this graphql query
query{
events {
creator {
email
}
}
}
returns "message": "Cannot return null for non-nullable field User.email.",
I'm completly new to graphql and any answer would be much appreciate.
maybe this might helps someone else, i don't know what happens there but i got expected results, by adding
const user = userId => {
return User.findById(userId).then(user => {
return { ...user._doc, _id: user.id };
})
.catch(err => {
throw err;
});
}
method and used it in event resolver function like this
events: () => {
return Event.find()
.populate('creator')
.then(events => {
return events.map(event => {
console.log('ev',event._doc)
return {
...event._doc,
_id: event.id,
// creator: {
// ...event._doc.creator._doc,
// _id: event._doc.creator.id
// }
creator: user.bind(this, event._doc.creator)
};
})
})
.catch(err => {
throw err;
})
},
When I save a new "experience" document with the model Experience, the experience _id is not saved into the document of the user. So my "experiences" array in the user document remains empty. Why?
const mongoose = require('mongoose');
const ExperienceSchema = mongoose.Schema({
name: String,
user: { type: mongoose.Schema.Types.ObjectId, ref: 'User' },
reviews: [{ type: mongoose.Schema.Types.ObjectId, ref: 'Review' }],
categories: [{ type: String }],
});
module.exports = mongoose.model('Experience', ExperienceSchema);
==============================================
const mongoose = require('mongoose');
const UserSchema = mongoose.Schema({
name: String,
experiences: [{ type: mongoose.Schema.Types.ObjectId, ref: 'Experience' }],
});
module.exports = mongoose.model('User', UserSchema);
=============================================
// Update experience to database
router.post('/:id', (req, res, next) => {
const idexp = req.params.id;
const newExperience = {
name: req.body.name,
user: req.user._id,
};
Experience.findOneAndUpdate({ _id: idexp }, newExperience, (err, result) => {
if (err) {
return res.render(`/${idexp}/edit`, { errors: newExperience.errors });
}
return res.redirect(`/experiences/${idexp}`);
});
});
The experiences is the sub-document of user schema. So, when you save experiences, the user will not be saved. However, when you save user, the experience should be saved.
Refer this subdocs documentation
Here is the solution... I needed to use $push to update the user document with the experience id before rendering the site.
Experience.findOneAndUpdate({ _id: idexp }, newExperience, (err, result) => {
if (err) {
return res.render('experiences/edit', { errors: newExperience.errors });
}
User.findByIdAndUpdate({ _id: req.session.passport.user._id }, { $push: { experiences: idexp } }, (err) => {
if (err) {
next(err);
} else {
return res.redirect(`/experiences/${idexp}`);
}
});
});
I want to do something like following code, but it failed.
var User = new Schema({
name: { type: String, required: true },
phone_number: { type: String, required: true },
modified: { type: Date, default: Date.now },
contacts: [{
user: { type : Schema.ObjectId, ref : 'User' }
}]
});
var UserModel = mongoose.model('User', User);
Is it able to achieve that purpose?
I think I used the wrong way to check it, actually it works.
Following is my test :
var mongoose = require('mongoose');
var Schema = mongoose.Schema;
mongoose.connect('localhost', 'contacts_test');
var User = new Schema({
name: { type: String, required: true },
phone_number: { type: String, required: true },
modified: { type: Date, default: Date.now },
contacts: [
{
user: { type: Schema.ObjectId, ref: 'User' }
}
]
});
var UserModel = mongoose.model('User', User);
mongoose.connection.on('open', function () {
var user1 = new UserModel({name: 'kos', phone_number: "003"});
user1.save(function (err) {
if (err) throw err;
var user2 = new UserModel({name: 'java', phone_number: "008"});
user2.contacts = [{user: user1._id}];
user2.save(function (err) {
UserModel.findById(user2._id)
.populate('contacts.user')
.exec(function (err, user) {
if (err) console.error(err.stack || err);
console.log('user name: ' + user.name);
console.error('contact of first result : ', user.contacts[0].user.name);
mongoose.connection.db.dropDatabase(function () {
mongoose.connection.close();
});
});
});
});
});