Mongoose Models

These are js files usually stored under a models folder. Used as templates for objects stored in MongoDB to follow.

Example Model Template

const mongoose = require('mongoose')
 
const ProductSchema = mongoose.Schema(
    {
        name : {
            type : String,
            required : [true, "Product name is required"]
        },
 
        quantity : {
            type : Number,
            required : true,
            default : 0
        },
 
        price : {
            type : Number,
            require: true,
            default : 0
        },
 
        image : {
            type : String,
            required : false,
        }
 
    },
    {
        timestamps : true
    }
 
);
 
const Product = mongoose.model("Product", ProductSchema);
module.exports = Product;

Built-in Methods

Mongoose models have built-in methods to communicate with the mongodb database.

model.create()

Input is a json which should match a similar structure to the product schema. If it matches the product schema, then that input is created in the database

const model = await Model.create({"hi" : "hello"});

model.find()

Takes a query input and then searches the mongodb database for that input.

const results = await Model.find({});

const results = await Model.find({"name" : "david"})

model.findById(id)

Takes the model’s id and then returns the one it found.

const results = await Model.findByID(id);

model.findByIDAndUpdate(id, newvalue)

const results = await Model.findByIDAndUpdate(id, newvalue);

model.findByIDAndDelete(id)

const results = await Model.findByIDAndDelete(id);