Retrieve and display Active Record data - ruby-on-rails

Question

I would like to show a number of things on my homepage, all being pulled from different tables in the database and just wanted to see the best way to do it.
Reading through https://guides.rubyonrails.org/v2.3.11/active_record_querying.html, I was able to get it to show the correct details, but is this the best way to do it? Are there performance issues to come with this method?
<% about = Page.find(1) %>
<h1 class="title"><%= about.title %></h1>
<% unless about.subtitle.blank? %>
<h2 class="subtitle"><%= about.subtitle %></h2>
<% end %>
<p><%= about.body %></p>
And on a similar topic, what is the best way to iterate and display data? This is what I would like to achieve:
<div class="tabs">
<ul>
<% Chapter.all.each do |c| %>
<li><a><%= chapter.title %></a></li>
<% end %>
</ul>
</div>
Any tips greatly appreciated!

Answer 1

To achieve this
<div class="tabs">
<ul>
<% Chapter.all.each do |c| %>
<li><a><%= c.title %></a></li>
<% end %>
</ul>
</div>
There is a few things that must be present:
First step
You need to have a model or data set that represent your data, example you might have a Person.rb file with name and hair color as properties. That can be your model, all it is doing is defining a dataset.
class Person < ApplicationRecord
scope :latest_Person, -> { order(date: :desc) }
validates :name, presence: true, length: { minimum: 5 }
validates :haircolor, presence: true
end
Second step
You need to declare or instantiate that model in your controller class, example you might need to show a list of persons in a particular order. That can be handled using scopes. Example
def persons
# Render all persons
#persons_all = Person.latest_Person
end
Third step
Calling the declared object from the controller class in the view. Basically all you are doing is referencing the declared object. Example
<% if #persons_all.empty? %>
<h2>No persons available</h2>
<% else %>
<% #persons_all.each do |p| %>
<p><%= p.name %></p>
<p><%= p.haircolor %></p>
<% end %>
<% end %>
Mark as answer is it helped, thank you.