Search example using query chain

controller.rb

# build a form that posts a document (or whatever) and the form must have the starts_at and ends_at attributes
# you might need to adjust the attributes

@documents = Document.all

# if we have the params
@documents = @document.where(referenced_at: params[:document][:starts_at]..params[:document][:ends_at]) if .....

form.html.erb

<!-- https://api.rubyonrails.org/classes/ActionView/Helpers/DateHelper.html#method-i-date_select -->
<%= form_tag documents_path %>
  <label>from</label>
  <%= date_select :document, :starts_at %>
  
  <label>to</label>
  <%= date_select :document, :endts_at %>
<% end %>