Limit ransack output by textfield

Question

I've started use ransack gem for filtering my database. But I cannot find out how can I define textfield which would define how many rows should display, e.g. I would enter 5 to my textfield and my output would display only 5 last results from database.

controller:

def index
    @q             = Roulette.search(params[:q])
    @numbers       = @q.result
end

view:

<%= search_form_for @q do |f| %>
  <div class="field">
    <%= f.label :table_id_eq, "Table" %>
    <%= f.select :table_id_eq, options_from_collection_for_select(Table.all, :id, :title, @q.table_id_eq), include_blank: true %>
  </div>

  <div class="field">
    <%= f.label :woman_id_eq, "Woman" %>      
    <%= f.select :woman_id_eq, options_from_collection_for_select(Woman.all, :id, :name, @q.woman_id_eq), include_blank: true %>
  </div>

  <div class="actions"><%= f.submit "Search" %></div>
<% end %>

<div id="numbers">
  <% @numbers.each do |no| %>
    <h4> <%= no.number %>,</h4>
  <% end %>
</div>

Answer 1

You can use ActiveRecord::QueryMethods#limit to limit the number of results returned in your controller.

 def index
     @q             = Roulette.search(params[:q]).limit(5)
     @numbers       = @q.result
 end

So you could pass a value from your textfield to your controller in the params hash, to be used by limit. Eg:

 @q = Roulette.search(params[:q]).limit(params[:no_of_results)