All you need to know about Mongoose

• MnongoDB provides it's native driver to work with our project at server side but it may be large amount of code or repetition in code but it's not the case with mongooses. In this article I am going to tell you how to get started with mongoose
  
  

• Mongoose is a Node.js package that gives you an interface to play with mongo database. It is very light weight npm package to use in our application. Mongoose has all sets of methods that help you to connect and access data stored in Mongo database.
  
  

• Mongoose is an Object Data Modeling (ODM) library for MongoDB and Node.js. Mongoose.js provides an abstraction layer on top of MongoDB that eliminates the need to use named collections in native MongoDB driver. Mongoose makes MongoDB easier to work with MongoDB. Mongoose allow developers to enforce a specific schema of desired object at the application layer.

What Mongoose Do ?

• provides schema validation
• It manages relationships between data
• make MongoDB easy to use

Content of this blog

1. Installing and Requiring Mongoose
2. Connecting To MongoDB database
3. Defining Schema
4. Creating Model
5. Creating and Saving Instance
6. Reading from DB
7. Updating
8. Deleting

(1). Installing andRequiring Mongoose

• install Mongoose npm package in your project directory as dependency using below shown command in terminal.

npm install mongoose --save

• Require mongoose in your application using this syntax

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(2). Connecting To MongoDB database

• Syntex
  mongoose.connect(<Database URI>);
  Using connection URI of database we cane connect to database.
  

• here test is Database name

• You can get connection Instance by const db = mongoose.connect;
  db object is used to listen the events attached to it.
  
  We can use any function method. so don't get confused😕 by seeing it.

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(3). Defining Schema

• schema is a way to describe *structure of documents * in database.

Schema accepts only the following Datatype.

• String
• Number
• Date
• Boolean
• Buffer
• ObjectId
• Mixed
• Array In above example some Schema validator are used.

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(4). Creating Model

• Mongoose model provides an interface to the database for creating, querying, updating, deleting etc...
• Model is one type of definition of database collection using collection name and schema name.
• Collection Name must be in singular form

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(5). Creating and Saving Instance

• We can save object in database using save() method on model.

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(6). Reading from DB

• We can reed data from database using find() on model and also find document by it's id using findById()

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(7). Updating

(8). Deleting

For more knowledge checkout my Github 👁