RAILS - HOW TO ADD VOTES IN A POLL - ruby-on-rails

Question

I'm new to Rails and I'm using translate to post here.
I'm practicing rails and for that I set up a poll (voting) system.
Until then the voting is working normally, the votes are stored correctly, however, I would like to set up a screen on the frontend to display the result, and that's where I'm having difficulty.
How can I sum the votes from the PollOptions table of the "Votes" column. I would like to display it like this:
name: 10 votes or X% of votes
name: 10 votes or X% of votes
name: 10 votes or X% of votes
As I understand it, I need to create a method in the controller that will do this sum?
Any documentation links/tips, I'd appreciate it.
polls_controller
class PollsController < ApplicationController
def index
#poll = Poll.where(finished_at: nil).last
#poll_options = #poll.poll_options.order :name
end
def vote
#poll_option = PollOption.find params[:poll_option_id]
#poll_option.increment! :votes
respond_to do |format|
format.turbo_stream { render :vote }
end
end
end
model:
poll
class Poll < ApplicationRecord
has_many :poll_options
end
poll_option
class PollOption < ApplicationRecord
belongs_to :poll
end
In this view, I would like to call the result of the vote.
view _poll.html.erb
<div id="poll-container" class="col-lg-8 mx-lg-auto">
<div class="card shadow">
<div class="card-header">
<h2 class="card-title text-center">
<%= #poll.name %>
<p>
<%= #poll_options.pluck(:name).to_sentence(last_word_connector: ' ou ') %>
</h2>
</div>
<div class="card-body">
<div class="d-flex flex-column bd-highlight mb-3">
<% #poll_options.each do |item| %>
<p>
<%= button_to vote_url,
method: :post,
class: "btn btn-outline-secondary",
params: { poll_option_id: item.id } do %>
<h2>
<%= item.name %>
<%= image_tag item.photo, size: "40x40" %>
</h2>
<% end %>
<% end %>
</div>
</div>
</div>
</div>
https://i.stack.imgur.com/JQfQP.png
Thanks in advance for any guidance.

Answer 1

You can use ActiveRecord::Calculations sum (.sum(:votes)) to sum all the rows for the votes column under poll_options.
To find all the votes of a poll you need the following
#poll.poll_options.sum(:votes)
Then to create the % for the PHP for example you could do
total_votes = #poll.poll_options.sum(:votes)
php_votes = #poll.poll_options.where(name: 'PHP').votes
(php_votes / total_votes).to_i * 100