i am following many example of mongoose for inner join with schema but not getting response my other tables.
my question is what is missing in my code please help me this.
i want getting result of class and subjects also.
exports.classSubjectList = async (req, res, next) => {
const obj = await ClassSubject.find().populate('classmodel').exec();
res.status(200).json({
success: true,
response: obj
});
};
//ClassSubjectModel
const mongoose = require('mongoose');
mongoose.Promise = global.Promise
const Schema = mongoose.Schema
const classModel = require('../class/classModel');
const subjectModel = require('../subject/subjectModel');
var classsubject = new Schema({
ClassId: String,
SubjectId : String,
IsShow: { type: Boolean, default : true},
classmodel: { type: mongoose.Schema.Types.ObjectId, ref: classModel },
subjectmodel: { type: mongoose.Schema.Types.ObjectId, ref: subjectModel },
});
//Class Model
const mongoose = require('mongoose');
mongoose.Promise = global.Promise
const Schema = mongoose.Schema
var classinfo = new Schema({
ClassName: String,
IsShow: { type: Boolean, default : true},
});
module.exports = mongoose.model('classinfo', classinfo);
//SUBJECT Model
const mongoose = require('mongoose');
mongoose.Promise = global.Promise
const Schema = mongoose.Schema
var subject = new Schema({
SubjectName: String,
IsShow: Boolean,
});
module.exports = mongoose.model('subject', subject);
result
[
{
"IsShow": true,
"_id": "5e1efc0f354849246c472cfe",
"SubjectId": "5e1da60bf52acb30b87e92c4",
"ClassId": "5e1ec13ed777bf28d01e2481",
"__v": 0
}]
You have to use model name instead of using file/object name in populate like as bellow.
exports.classSubjectList = async (req, res, next) => {
const obj = await ClassSubject.find().populate('classinfo').exec();
res.status(200).json({
success: true,
response: obj
});
};
//ClassSubjectModel
const mongoose = require('mongoose');
mongoose.Promise = global.Promise
const Schema = mongoose.Schema
const classModel = require('../class/classModel');
const subjectModel = require('../subject/subjectModel');
var classsubject = new Schema({
ClassId: String,
SubjectId : String,
IsShow: { type: Boolean, default : true},
classmodel: { type: mongoose.Schema.Types.ObjectId, ref: classinfo },
subjectmodel: { type: mongoose.Schema.Types.ObjectId, ref: subjectModel },
});
Related
I have a model like this:
const mongoose = require('mongoose');
const schemaOpts = { toJSON: { virtuals: true } };
const { Schema } = mongoose;
const { v4: uuidv4 } = require('uuid');
const IdentitySchema = require('./Identity');
const Title = require('./Title');
var titleSchema = Title.schema.tree.series[0];
const a = async function() {
return await Title.findOne({_id: 'titles'})
};
titleSchema.a.enum = a();
const schema = new Schema({
short_id: {
type: String,
default: uuidv4().slice(0, 8),
},
name: {
type: String,
required: [true, 'required']
},
FIELD: {
type: String,
required: [true, 'required']
},
})
const UserModel = mongoose.model('users', schema)
module.exports = UserModel
How do I get a() function value? Or in this place I can only use fixed code? I think other way to do this is modify it in route but I google it can not. I'm using expressjs 4.16.1 and mongoose 6.3.4.
I'm trying to create a schema subdocument but am getting the error listed above,
The schemas in question look like this
Schema casuing issues
const mongoose = require('mongoose');
const Schema = mongoose.Schema
const CharacterSchema = new Schema();
CharacterSchema.add({
name: {
type: String,
required: true
},
title: {
type: String
},
charcterClass: { // will be limited in form creation
type: String
},
level: {
type: Number
}
});
const Charcter = mongoose.model('User', CharacterSchema);
module.exports = Charcter;
Schema calling schema above
const mongoose = require ('mongoose');
const Schema = mongoose.Schema;
const {CharacterSchema} = require(__dirname +'/CharacterModel.js');
const UserSchema = new Schema()
UserSchema.add({
name: {
type: String,
required: true
} ,
characters: [CharacterSchema]
});
const User = mongoose.model('Character', UserSchema);
module.exports = User;
Try to do the import like this way
const {CharacterSchema} = require(__dirname +'/CharacterModel.js').schema;
Adding the .schema at the end.
This post is related to your issue, you will see the explanation there.
Embedding schemas is giving error
UserSchema :
const mongoose = require ('mongoose');
const Schema = mongoose.Schema;
const CharacterSchema = new Schema({
name: {
type: String,
required: true
},
title: {
type: String
},
charcterClass: {
type: String
},
level: {
type: Number
}
});
const UserSchema = new Schema({
name: {
type: String,
required: true
} ,
characters:{
type:[CharacterSchema]
}
});
const User = mongoose.model('User', UserSchema);
module.exports = User;
I think it's not populating categories couse when i try log 'category' in console i get
"ReferenceError: category is not defined". For me it is like in docs but as we see it's not. Is anyone can tell me what is wrong??
//model/Category.js
const mongoose = require("mongoose");
const Schema = mongoose.Schema;
const CatSchema = new Schema({
title: {
type: String,
required: true
},
body: {
type: String,
required: true
}
});
mongoose.model("categories", CatSchema, "categories");
model/Story.js
const mongoose = require("mongoose");
const Schema = mongoose.Schema;
const StorySchema = new Schema({
title: {
type: String,
required: true
},
body: {
type: String,
required: true
},
category: {
type: Schema.Types.ObjectId,
ref: "categories"
}
});
mongoose.model("stories", StorySchema, "stories");
routes/stories.js
const express = require('express');
const router = express.Router();
const mongoose = require('mongoose');
const Category = mongoose.model('categories');
const Story = mongoose.model('stories');
router.get('/add', (req, res) => {
Story.find()
.populate('category', 'title')
.then(stories => {
res.render('stories/add', {
stories: stories
});
});
});
Query.prototype.populate() returns a Query object on which you need to run .exec(), try this:
Story.find({})
.populate('category', 'title')
.exec()
.then(stories => {
res.render('stories/add', {
stories: stories
});
});
It was problem with that how I want to use it. Code is working
I have 2 schema products and orders as shown below:
products.js
var mongoose = require('mongoose');
const productsSchema = mongoose.Schema({
prod_name : {
type: String,
required: true
},
qty : {
type: Number,
required: true
},
price : {
type: Number,
require: true
}
});
mongoose.model('Products', productsSchema);
orders.js
const mongoose = require('mongoose');
const ProductsModel = mongoose.model('Products');
const OrdersSchema = mongoose.Schema({
order_date : {
type: Date,
required: true
},
sum : {
type: Number,
required: true
},
products: [ProductsModel]
});
const Orders = module.exports = mongoose.model('Orders', OrdersSchema);
app.js where am referencing the files
var express = require('express');
var mongoose = require('mongoose');
var app = express();
const contact = require('./routes/contacts');
const product = require('./routes/products');
const order = require('./routes/orders');
mongoose.connect('mongodb://localhost:27017/contactlist')
const port = 3000;
app.use('/contacts', contact);
app.use('/products', product);
app.use('/orders', order);
app.listen(port, () => {
console.log('Server started at port ' + port);
})
In above orders.js am trying to include products schema and its giving below error
MissingSchemaError: Schema hasn't been registered for model "Products".
I want to store array of products in same orders schema.
Where am i doing wrong?
To have a reusable mongoose model you should export the schema as a model
like the following code:
const mongoose = require('mongoose');
const productsSchema = mongoose.Schema({
prod_name : {
type: String,
required: true
},
qty : {
type: Number,
required: true
},
price : {
type: Number,
require: true
}
});
module.exports = mongoose.model('Products', productsSchema);
The problem is probably that you forgot to use new which creates a new Schema.
Try changing :
const productsSchema = mongoose.Schema
To :
const productsSchema = new mongoose.Schema
In orders.js you will be able to get the schema like this :
mongoose.model('Products').schema
can you explain me how to organize mongoose models to create one to many connections? It is needed keep separate collections.
suppose i have stores and items
//store.js
var mongoose = require('mongoose');
module.exports = mongoose.model('Store', {
name : String,
itemsinstore: [ String]
});
//item.js
var mongoose = require('mongoose');
module.exports = mongoose.model('Item', {
name : String,
storeforitem: [String]
});
Am i doing it in the right way?
And how to access pass data to arryas?
Here is the code yo enter name to item. But how to enter id to array of id's (itemsinstore)?
app.post('/api/stores', function(req, res) {
Store.create({
name: req.body.name,
}, function(err, store) {
if (err)
res.send(err);
});
})
You should use model reference and populate() method:
http://mongoosejs.com/docs/populate.html
Define your models:
var mongoose = require('mongoose');
var Schema = mongoose.Schema;
var storeSchema = Schema({
name : String,
itemsInStore: [{ type: Schema.Types.ObjectId, ref: 'Item' }]
});
var Store = mongoose.model('Store', storeSchema);
var itemSchema = Schema({
name : String,
storeForItem: [{ type: Schema.Types.ObjectId, ref: 'Store' }]
});
var Item = mongoose.model('Item', itemSchema);
Save a new item into an existing store:
var item = new Item({name: 'Foo'});
item.save(function(err) {
store.itemsInStore.push(item);
store.save(function(err) {
// todo
});
});
Get items from a store
Store
.find({}) // all
.populate('itemsInStore')
.exec(function (err, stores) {
if (err) return handleError(err);
// Stores with items
});
You can do using the best practices with Virtuals.
Store.js
const mongoose = require('mongoose')
const Schema = mongoose.Schema
const StoreSchema = new Schema({
name: {
type: String,
required: true
},
createdAt: {
type: Date,
default: Date.now
}
})
StoreSchema.virtual('items', {
ref: 'Item',
localField: '_id',
foreignField: 'storeId',
justOne: false // set true for one-to-one relationship
})
module.exports = mongoose.model('Store', StoreSchema)
Item.js
const mongoose = require('mongoose')
const Schema = mongoose.Schema
const ItemSchema = new Schema({
storeId: {
type: Schema.Types.ObjectId,
required: true
},
name: {
type: String,
required: true
},
createdAt: {
type: Date,
default: Date.now
}
})
module.exports = mongoose.model('Item', ItemSchema)
StoreController.js
const Store = require('Store.js')
module.exports.getStore = (req, res) => {
const query = Store.findById(req.params.id).populate('items')
query.exec((err, store) => {
return res.status(200).json({ store, items: store.items })
})
}
Keep in mind that virtuals are not included in toJSON() output by default. If you want populate virtuals to show up when using functions that rely on JSON.stringify(), like Express' res.json() function, set the virtuals: true option on your schema's toJSON options.
// Set `virtuals: true` so `res.json()` works
const StoreSchema = new Schema({
name: String
}, { toJSON: { virtuals: true } });
Okay, this is how you define a dependancy:
var mongoose = require('mongoose');
module.exports = mongoose.model('Todo', {
name : String,
itemsinstore: [{ type: Schema.Types.ObjectId, ref: 'Item' }]
});
And make sure you have different names:
var mongoose = require('mongoose');
module.exports = mongoose.model('Item', {
name : String,
storeforitem: [String]
});
Keep an eye on Item in both cases.
And then you just want to pass the array of ObjectIDs in it. See more here: http://mongoosejs.com/docs/populate.html
Try this:
Store.findOne({_id:'5892b603986f7a419c1add07'})
.exec (function(err, store){
if(err) return res.send(err);
var item = new Item({name: 'Foo'});
item.save(function(err) {
store.itemsInStore.push(item);
store.save(function(err) {
// todo
});
});