StimulusReflex Selector Morph

_article.html.erb

<%= article.title # ... etc %>

filterable_reflex.rb

class FilterableReflex < ApplicationReflex
  def filter
    resource, param = element.dataset.to_h.fetch_values(:resource, :param)

    resource_key = resource.pluralize.underscore.to_sym
    session[resource_key][:param] = param
    session[resource_key][:value] = element.value

    morph "##{resource_key}", ApplicationController.render(resource.underscore, collection: resource.constantize.where(session[resource_key][:param] => session[resource_key][:value]))
  end
end

index.html.erb

<%= label_tag "category" %>
<%= select_tag "category",
    options_from_collection_for_select(Category.all, :id, :name)
    data: { action: "change->filterable#filter",
      resource: 'Article',
      param: 'category',
      reflex_root: "#articles" } %>

<div id="articles">
  <%= render 'article', collection: @articles %>
</div>