a turbo stream update example

_button.html.erb

<%
  voted = Current.user && post.votes.exists?(user: Current.user)
%>

<div id="<%= dom_id(post, :vote) %>", class="inline-block align-middle">
  <% if voted %>
    <%= form_with url: site_post_vote_path(post), method: :delete do |form| %>
      <%= render "components/button", type: :submit, style: :outlined, label: post.votes_count, icon: :arrow_upward, active: true %>
    <% end %>
  <% else %>
    <%= form_with url: site_post_vote_path(post), method: :post do |form| %>
      <%= render "components/button", type: :submit, style: :outlined, label: post.votes_count, icon: :arrow_upward %>
    <% end %>
  <% end %>
</div>

_voters.html.erb

<div id="<%= dom_id post, :voters %>" class="flex flex-wrap gap-1">
  <% if post.voters.any? %>
    <% post.voters.order("votes.created_at desc").each do |voter| %>
      <a href="#" class="block">
        <%= image_tag user_avatar_url(voter), class: "h-10 w-10 rounded-full" %>
      </a>
    <% end %>
  <% else %>
    <div class="text-sm text-gray-500">
      No voters
    </div>
  <% end %>
</div>

update.turbo_stream.erb

<%= turbo_stream.replace dom_id(@post, :vote), partial: "sites/votes/button", locals: {post: @post} %>

<%= turbo_stream.replace dom_id(@post, :voters), partial: "sites/votes/voters", locals: {post: @post} %>

votes_controller.rb

class Sites::VotesController < Sites::BaseController
  before_action :require_current_user
  before_action :set_post

  def create
    @post.votes.create(user: Current.user, site: Current.site)
    render :update
  end

  def destroy
    @post.votes.destroy_by(user: Current.user)
    render :update
  end

  private

  def set_post
    @post = Current.site.posts.find(params[:post_id])
  end
end