Active Admin 3.2.0 — Intro

How To Use Active Admin 3.2 — Part XI — Effortlessly Tailor the Admin Interface to Your Needs— RailsSeries#Episode 13

Greetings!

This gem is quite intriguing as it heavily utilizes either auto-generated code or DSLs to tailor the admin interface. One notable aspect is its robust security feature: there’s no possibility for anyone to elevate their role to admin and gain unauthorized access. This is ensured by the absence of admin privileges recorded in the admin user table, which greatly enhances security.

Let’s dive into the basics together, so you can get off to a smooth start with this gem that’s widely embraced by the community.

Welcome aboard! Official Documentations link.

Let’s Get Started!

GitHub

0#step— Run in your Terminal and open vs code:

rails new admin_example
cd admin_example
code .

1#step — GoTo Gemfile:

gem 'activeadmin', '~> 3.2.0'
gem 'devise'
gem 'sassc'

2#step — Run:

bundle install

3#step — Now the fun begins!

rails g active_admin:install

4#step — Run:

rails db:migrate

5#step — Run

rails g scaffold User name email password_digest password_confirmation

6#step — Run:

rails g scaffold Post title body:text published_at:datetime user:references 

7#step — GoTo:

app/models/application_record.rb

def self.ransackable_attributes(_auth_object = nil)
  %w[id email created_at updated_at]
end

8#step — Run the app:

rails db:migrate
rails db:seed
rails s

admin@example.com — password

Hey, gorgeous dash! Catch you later!

The admin user table is managed by the device within the Active Admin gem.

Wow, these pages are amazing even without a single line of code yet!

9#step — Let’s register our models. Run:

rails g active_admin:resource User
rails g active_admin:resource Post

10#step — Let’s customize each file created by the gem:

GoTo:

app/admin/posts.rb

ActiveAdmin.register Post do
  permit_params :title, :body, :published_at, :user_id

  filter :title_cont, label: 'Title' # Add a filter for the name attribute
  filter :body_cont, label: 'Body' # Add a filter for the email attribute
  filter :published_at, label: 'Published_at'
  # filter :user_id, with: 'user_id'

  index do
    selectable_column
    id_column
    column :title
    column :body

    actions
  end

  form do |f|
    f.inputs do
      f.input :user
      f.input :title
      f.input :body
    end
    f.actions
  end

end

11#step —GoTo:

app/admin/users.rb

ActiveAdmin.register User do
  permit_params :name, :email # Ensure name and email are permitted parameters

  filter :name_cont, label: 'Name' # Add a filter for the name attribute
  filter :email_cont, label: 'Email' # Add a filter for the email attribute

  index do
    selectable_column
    id_column
    column :name
    column :email
    actions
  end

  form do |f|
    f.inputs do
      f.input :name
      f.input :email
    end
    f.actions
  end

end

12#Step — GoTo:

app/models/post.rb

belongs_to :user

def self.ransackable_attributes(_auth_object = nil)
  %w[user_id title body] # Allow searching by user_id, title and body
end

def self.ransackable_associations(_auth_object = nil)
  [] # We don't have any searchable associations in this case
end

13#Step — GoTo:

app/models/user.rb

has_many :posts

def self.ransackable_attributes(_auth_object = nil)
  %w[name email] # Allow searching by name and email
end

def self.ransackable_associations(_auth_object = nil)
  [] # We don't have any searchable associations in this case
end

14#Step — rails s:

GoTo: http://127.0.0.1:3000/admin/

Here you can create, edit, and delete a post.

Here you can create, edit, and delete a user.

We believe that’s everything for now.

In our next episode, let’s work on upgrading our website to give it a more professional appearance.

We hope you grasp the big picture here!

Goodbye!

Credits & References

Rails Admin Interfaces with ActiveAdmin by Chris Oliver (GoRails)

Setting up Strong Parameters by github.com/activeadmin

Git Tags

git tag -a v1 -m "ActiveAdmin 3.2.0 :  Go to  https://medium.com/jungletronics/rails-active-admin-3-2-0-85d04f40e066" -m "0- Load the necessary gems;" -m "1- Install Active Admin;" -m "2-Generate scaffolds for Post and User Models;" -m "3- Update the application record file;" -m "4- Migrate and test default settings;" -m "5- Register the models in the framework;" -m "6-Modify the admin files and the models accordingly;You're all set!" -m "Thank you for downloading this project 😍️" 
git push origin v1

Related Posts:

01# Quick Start — Part I — Get started with a very simple rails 7 frame;

02# Navbar Creation — Part II — Create a Navbar & User Functionalities in Dropdown;

03# Features — Part III — Implements some Cool advanced features.