"Advanced search" on rails & will_paginate gem

search.rb

class Search < ActiveRecord::Base

def search_posts
		posts= Post.all		
		posts= posts.contains_key(keyboards) if keyboards.present?
		posts= posts.wSize(size_id) if size_id.present?
		return posts
end

end

searches_controller.rb

class SearchesController < ApplicationController
	
	#...

	def create
		@search = Search.create(search_params)
		redirect_to @search
	end

	def show
		@active=:show
		@search = Search.find(params[:id])
		@searchResults= @search.search_posts.paginate(page: params[:page], per_page: 8)
	end

	def search_params
		params.require(:search).permit(:keyboards, :size_id)
	end

end

show.html.erb

<% if @searchResults.empty? %>
	<p>No results</p>
<% else %>
	<% @searchResults.in_groups_of(4,false).each do |group| %>  #to show in 4 columns
		<div class="row">
			<% group.each do |p| %>
				<div class="col-sm-3">
					<div class="thumbnail">
						<div class="caption">
							<h3>p.title</h3>
							<!-- and every other thing you want to show of the post -->
						</div>
					</div>
				</div>
			<% end %>
		</div>
		<div class="col-sm-12" style="text-align: centered;">
		</div>
	<% end %>		
	
	<%= will_paginate @searchResults, renderer: BootstrapPagination::Rails, previous_label: "Anterior", next_label: "Siguiente" %>
	
<% end %>
</div>