To create a task management system with Ruby on Rails, you can follow these steps:

1. Set up a new Rails application by running the following command in your terminal:
“`
rails new task_management_system
“`

2. Change into the project directory:
“`
cd task_management_system
“`

3. Generate a Task model and migration file:
“`
rails generate model Task title:string description:text due_date:date completed:boolean
“`

4. Run the database migration to create the tasks table:
“`
rails db:migrate
“`

5. Open the `app/models/task.rb` file and add the following validation for the title:
“`ruby
class Task < ApplicationRecord
validates :title, presence: true
end
“`

6. Generate a Tasks controller:
“`
rails generate controller Tasks
“`

7. Open the `config/routes.rb` file and add the following routes:
“`ruby
Rails.application.routes.draw do
resources :tasks
root ‘tasks#index’
end
“`

8. Open the `app/controllers/tasks_controller.rb` file and add the following actions:
“`ruby
class TasksController < ApplicationController
before_action :set_task, only: [:show, :edit, :update, :destroy]

def index
@tasks = Task.all
end

def show
end

def new
@task = Task.new
end

def create
@task = Task.new(task_params)
if @task.save
redirect_to @task, notice: ‘Task was successfully created.’
else
render :new
end
end

def edit
end

def update
if @task.update(task_params)
redirect_to @task, notice: ‘Task was successfully updated.’
else
render :edit
end
end

def destroy
@task.destroy
redirect_to tasks_url, notice: ‘Task was successfully destroyed.’
end

private

def set_task
@task = Task.find(params[:id])
end

def task_params
params.require(:task).permit(:title, :description, :due_date, :completed)
end
end
“`

9. Create the views for the tasks by creating the following files:
– `app/views/tasks/index.html.erb`
– `app/views/tasks/show.html.erb`
– `app/views/tasks/new.html.erb`
– `app/views/tasks/edit.html.erb`

10. Open the `app/views/tasks/index.html.erb` file and add the following code to display the list of tasks:
“`erb

Tasks

<%= link_to ‘New Task’, new_task_path %>
“`

11. Open the `app/views/tasks/show.html.erb` file and add the following code to display the details of a task:
“`erb

Title:
<%= @task.title %>

Description:
<%= @task.description %>

Due Date:
<%= @task.due_date %>

Completed:
<%= @task.completed ? ‘Yes’ : ‘No’ %>

<%= link_to ‘Edit’, edit_task_path(@task) %> |
<%= link_to ‘Back’, tasks_path %>
“`

12. Open the `app/views/tasks/new.html.erb` file and add the following code to create a new task:
“`