I have two models. The first one is UserSchema and the second one is CategorySchema
var UserSchema = Schema({
firstName: {
type: String,
required: true
},
secondName: String,
lastName: {
type: String,
required: true
},
email: {
type: String,
unique: true,
required: true
},
password: {
type: String,
required: true
},
status: {
type: String,
required: true
},
roles: [{
type: Schema.ObjectId,
ref: 'Role'
}],
publications: [{
title: {
type: String,
},
description: String,
status: {
type: String,
},
createdAt: {
type: Date
},
updatedAt: {
type: Date,
default: Date.now()
},
pictures: [{
name: String
}],
categories: [{
type: Schema.Types.ObjectId,
ref: 'Category'
}],...
the model category is
var CategorySchema = Schema({
name: String,
subcategories: [{
name: String
}]
});
UserSchema has publications. Publications contains an array. Within of publications is categories that contains an array of id of subcategory(subcategory is whithin of CategorySchema)
the problem is when I need to populate categories of UserSchema. Categories of UserSchema have an array of _id of subcategory that belongs to CategorySchema.
Related
Here is my very basic product schema:
const productSchema = new Schema({
productName: {
type: String,
required: true,
},
productDescription: {
type: String,
},
productPrice: {
type: Number,
},
});
module.exports = mongoose.model("Product", productSchema);
These products are listed out and a user can add a quantity for each. I am storing in an array of objects as per below. I want to join these two collections together so that I can output the qty of products selected by the user. I believe I need to use populate here but not sure how to set up the Refs and so on.
const PartySchema = new Schema({
firstName: {
type: String,
required: true,
},
lastName: {
type: String,
required: true,
},
catering: [{ id: mongoose.Types.ObjectId, qty: Number }],
created_at: {
type: Date,
default: Date.now,
},
});
module.exports = mongoose.model("Party", PartySchema);
I'm sharing this solution with the assumption that the catering field is the sub-document array pointing to the Product Schema:
The Product Schema is fine so it stays the same (although to keep to convention I would advice naming your schema 'Products' instead of 'Product', Mongo Naming Covention):
const productSchema = new Schema({
productName: {
type: String,
required: true,
},
productDescription: {
type: String,
},
productPrice: {
type: Number,
},
});
module.exports = mongoose.model("Products", productSchema);
And next the Party Schema would be:
const PartySchema = new Schema({
firstName: {
type: String,
required: true,
},
lastName: {
type: String,
required: true,
},
catering: [{
id: {
type: mongoose.Types.ObjectId,
ref: 'Products',
},
qty: {
type: Number,
}
}],
created_at: {
type: Date,
default: Date.now,
},
});
module.exports = mongoose.model("Parties", PartySchema);
I want to join two schemas into one because they both have almost same attributes and i want to use it for PostSchema that a user and also an owner can create and show their posts but i dont know how to achieve it
for example :
UserSchema
const UserSchema = new mongoose.Schema({
name: {
type: String,
required: true,
},
email: {
type: String,
required: true,
},
password: {
type: String,
required: true,
},
gender: String,
role: {
type: String,
default: "User",
},
});
OwnerSchema
const OwnerSchema = new mongoose.Schema({
name: String,
gender: String,
email: String,
password: String,
role: {
type: String,
default: 'Owner'
},
restaurant: RestaurantSchema
})
PostSchema
const PostSchema = new mongoose.Schema({
title: {
type: String,
required: true,
},
body: {
type: String,
required: true,
},
photo: {
type: String,
required: true,
},
postedBy: {
type: ObjectId,
ref: *Combined user and owner*,
},
comments: [CommentSchema],
}, { timestamps: true });
Get rid of your OwnerSchema - and modify your UserSchema to something like the below:
const UserSchema = new mongoose.Schema({
name: {
type: String,
required: true,
},
email: {
type: String,
required: true,
},
password: {
type: String,
required: true,
},
gender: String,
role: {
type: String,
default: "User", //could be Owner when applicable
},
restaurant: RestaurantSchema, //could be null when role=User
});
I have a user schema and an exam schema, i wanted to pass the id of the user to the schema of the exam
const ExamSchema = new mongoose.Schema({
-----> _id: [{
class: { type: String, required: true },
module: { type: Number,required:true },
date: {type: Date, required: true }
}]
Where it says _id - i wanted it to be the id of the user! Should i do it like this or add the exams schema on the user schema? Like this?
const UserSchema = new mongoose.Schema({
username: { type: String, require: true },
email: { type: String, required: true, unique: true },
password: { type: String, required: true },
active: { type: Boolean, default: true },
exam: [{
class: { type: String, required: true },
module: { type: Number,required:true },
date: {type: Date, required: true }
}]
});
Check Mongoose "Populate"
https://mongoosejs.com/docs/populate.html
A part from the docs,
const mongoose = require('mongoose');
const Schema = mongoose.Schema;
const personSchema = Schema({
_id: Schema.Types.ObjectId,
name: String,
age: Number,
stories: [{ type: Schema.Types.ObjectId, ref: 'Story' }]
});
const storySchema = Schema({
author: { type: Schema.Types.ObjectId, ref: 'Person' },
title: String,
fans: [{ type: Schema.Types.ObjectId, ref: 'Person' }]
});
const Story = mongoose.model('Story', storySchema);
const Person = mongoose.model('Person', personSchema);
So far we've created two Models. Our Person model has its stories field set to an array of ObjectIds. The ref option is what tells Mongoose which model to use during population, in our case the Story model. All _ids we store here must be document _ids from the Story model.
In your case just make a user_id in Exam Schema and refer to id of User Schema
const ExamSchema = new mongoose.Schema({
user_id: {type: Schema.Types.ObjectId, ref: 'User' },
class: { type: String, required: true },
module: { type: Number,required:true },
date: {type: Date, required: true }
})
At the moment i have 4 models. User, profile, interests and tokens. Between user and profile there is a one to one relationship. Between User and tokens there is a one to many relationship. Between profile and interests there is also a one to many relationships, interests will be pre defined with the ability for an admin to add more later.
User
var UserSchema = new Schema({
email: {
type: String,
lowercase: true,
unique: true,
required: true
},
phone: [{countrycode: String}, {number: String}],
tokens: [{type: Schema.Types.ObjectId, ref: 'Token'}],
profile: {
type: Schema.Types.ObjectId, ref: 'Profile'
},
},
{
timestamps: {createdAt: 'created_at', updatedAt: 'updated_at'}
});
Profile
var ProfileSchema = new Schema({
username: {
type: String,
unique: true,
},
firstname: {
type: String
},
lastname: {
type: String
},
gender: {
type: String
},
dob: {
type: Date
},
country: {
type: String
},
city: {
type: String
},
avatar: {
type: String
},
about: {
type: String
},
interests: [{
type: Schema.Types.ObjectId,
ref: 'Interest'
}],
},
{
timestamps: {createdAt: 'created_at', updatedAt: 'updated_at'}
});
Token
var TokenSchema = new Schema({
name: {
type: String,
},
value: {
type: String,
},
},
{
timestamps: {createdAt: 'created_at', updatedAt: 'updated_at'}
});
Interests
var InterestSchema = new Schema({
name: {
type: String,
unique: true,
},
},
{
timestamps: {createdAt: 'created_at', updatedAt: 'updated_at'}
});
Have i set up these schemeas/relationships properly? Now if i wanted to give roles to a user would i create a new role schema?
thanks.
I think you need Relational database if you want to make relation in NoSQL db
You can't add relations in NoSQL. Only thing you can is to use schema as type of field in another schema, like
var Comments = new Schema({
title: String,
body: String,
date: Date
});
var BlogPost = new Schema({
author: ObjectId,
title: String,
body: String,
date: Date,
comments: [Comments],
meta: {
votes : Number,
favs : Number
}
});
mongoose.model('BlogPost', BlogPost);
Embedded Documents
I need to find a Project by either Owner, Manager, or one of the Team Members. Here's how the schema looks like:
var project = new mongoose.Schema({
title: { type: String, require: true },
slug: { type: String, require: true },
description: { type: String, require: true },
descriptionHtml: { type: String, require: true },
nextVanityId: { type: Number, default: 1 },
owner: { type: ObjectId, ref: 'Member', require: true },
teams: [{ type: ObjectId, ref: 'Team' }],
managers: [{ type: ObjectId, ref: 'Member' }]
};
var team = new mongoose.Schema({
name: { type: String, require: true },
slug: { type: String, require: true },
project: { type: ObjectId, require: true, ref: 'Project' },
created: { type: Date, require: true, default: Date.now },
members: [{ type: ObjectId, default: null, ref: 'Member' }]
};
My query method looks like this:
function findByMember (member, done) {
var id = member._id;
Project
.find()
.or([
{ owner: id },
{ managers: id },
{ 'teams.members': id }
])
.exec(done);
}
Currently it works for both owners and managers, but I'm drawing blanks when querying the members collection of each team. What should I use?
In order for your query to work you can approach the problem in 2 ways.
Solution 1
Have your teams as an embedded document in projects:
var team = new mongoose.Schema({
name: { type: String, require: true },
slug: { type: String, require: true },
project: { type: ObjectId, require: true, ref: 'Project' },
created: { type: Date, require: true, default: Date.now },
members: [{ type: ObjectId, default: null, ref: 'Member' }]
};
var project = new mongoose.Schema({
title: { type: String, require: true },
slug: { type: String, require: true },
description: { type: String, require: true },
descriptionHtml: { type: String, require: true },
nextVanityId: { type: Number, default: 1 },
owner: { type: ObjectId, ref: 'Member', require: true },
teams: [team],
managers: [{ type: ObjectId, ref: 'Member' }]
};
This way your project document will have the team information and the teams.members makes sense.
Solution 2
Denormalise your Team data to have only the relevant information embedded:
var team = new mongoose.Schema({
name: { type: String, require: true },
slug: { type: String, require: true },
project: { type: ObjectId, require: true, ref: 'Project' },
created: { type: Date, require: true, default: Date.now },
members: [{ type: ObjectId, default: null, ref: 'Member' }]
};
var project = new mongoose.Schema({
title: { type: String, require: true },
slug: { type: String, require: true },
description: { type: String, require: true },
descriptionHtml: { type: String, require: true },
nextVanityId: { type: Number, default: 1 },
owner: { type: ObjectId, ref: 'Member', require: true },
teams: [{
_id: { type: ObjectId, ref: 'Team' },
members: [{ type: ObjectId, default: null, ref: 'Member' }]
}],
managers: [{ type: ObjectId, ref: 'Member' }]
};
In this second approach you need to keep the Team document and the denormalised data in sync.