Crud Operations with Ruby on Rails

 Today we are going to discuss Ruby On Rails. This is my first blog about ROR. Rails is a server-side application framework written in Ruby. Rails is an MVC framework.

Here we will discuss how we can perform CRUD operations API in ROR with pagination while listing the data.

Step1

Create new rails project using the below command

rails new project

 

Step 2

Configure your database in database.yml inside the config folder

Step 3

Create a new database using the below command

rails db:create

Step 4

Create a model using the below command

rails g model <model_name>

Ex: rails g model users

Step 5

Creating a controller using the command below

rails g:controller <controller_name>

Ex: rails g controller users

Step 6

Configuring the routes in the routes.rb file

Rails.application.routes.draw do

  resources :users

end

Step 7

For listing the data using the pagination I am using kaminari gem

Step 8

Now we are listing the data using the below set of code

def index
    @user = User.order("id DESC")  .page(params[:page]).per(params[:per_page])
    @user_data = []
    @user.each do |user|
      @user_data.push(
        id: user.id,
        user_name: user.username,
        password: user.password,
        display_name: user.display_name,
        created_at: user.created_at.strftime('%Y-%m-%d %H:%M:%S'),
      )
    end
    render json: {
      data: @user_data,
      total: @user.total_count,
      recordsFiltered: @user.total_count,
      recordsTotal: @user.total_count
    }

end

Step 9

Create a new user data

def create
   @user = User.create(user_params)
   render json: @user

end

Step 10

Show a user data

def show
    @user = User.find(params[:id])
    render json: @user

end

Step 11

Update a user data

def update
    @user = User.find(params[:id])
    @user.update_attributes(user_params)
    render json: @user
end

Step 12

Destroy a user data

def destroy
    @user = User.find(params[:id]).destroy
    render json: {message: "Deleted"}

end

Step 13

Now we are creating the user params a the last

protected
  def user_params
    params.permit(
      :username,
      :password,
      :display_name
    )
  end

Hence we completed the crud operations. You can check the full set of codes in my below Git Link . If you have any queries please contact me back