Rails: view loop refactoring

Question

This is horrible code, I know. How can I move it into the model when it's based on each record in a collection?

<% @brands.each do |b| %>
  <% booleans = Preference.columns.select { |c| c.type == :boolean }.map(&:name) %>
  <% trues = booleans.select { |name| b.preference.send(name) == true } %>
  <%= trues.to_sentence.humanize %>
<% end %>

Answer 1

Place the logic into your model:

# app/models/brand.rb
def self.trues
  self.all.each do |b| # OR whatever collection you're trying to iterate through
    booleans = Preference.columns.select {|c| c.type == :boolean}.map(&:name)
    trues = booleans.select {|name| b.preference.send(name) == true}
    return trues
  end
end

Then, display the returned value in your view:

# view
<%= Brand.trues.to_sentence.humanize %>

As a matter of convention, you may want to store the model convenience method to an instance variable in your controller, then render the instance variable from within your view:

# controller action
@trues = Brand.trues

# view
<%= trues.to_sentence.humanize %>