# Blog Using the MERN Stack Part 2 - Setting up CRUD on the backend

## Introduction

In programming, CRUD stands for: CREATE, READ, UPDATE and DELETE which are the four functions of persistant storage.  

Now, for web development, we have HTTP request methods.  The four CRUD functions can be mapped to their respective HTTP request methods:

| CRUD   | HTTP Request |
| ------ | ------------ |
| CREATE | POST         |
| READ   | GET          |
| UPDATE | PUT          |
| DELETE | DELETE       |

## User Stories

We need to think about how a user will interact with the site.  Do we want to have logged in users interact with the site or do we want to have all users to have CRUD functionality?  I don't think the latter is very functional.  

#### User not logged in

As a user who is not logged in, I want to be able to: 

* View all posts
* View a specific post

#### Logged in user

As a user who is logged in, I want to be able to:

* Do everything that a user that is not logged can do
* Create a post
* Edit a post
* Delete a post
* Edit my details

#### Admin

As an admin, I want to be able to:

* View all posts
* View a specific post
* Create a post
* Edit a post
* Delete a post
* Delete a user

With this we can see that we want two databases: 

* Users
* Posts

## Setting up our database

We'll start off using a local database first to get functionality up an running.