ruby on rails - reading multiple values from check box and display results in RoR -


i've 2 models brands , categories. display products comes under brands , categories.

after if check of brands nike, display proper result. later on if check nike , adidas under brands won't display nike products instead display adidas products.

here code.

def index catids=array.new brandids=array.new if(!(params[:catid].nil?) && params[:catid].to_s.downcase != "all") catids=arrayconvertion(params[:catid]) end  if(!(params[:brandid].nil?) && params[:brandid].to_s.downcase != "all") brandids=arrayconvertion(params[:brandid]) end     if(catids.length == 0 && brandids.length == 0)        @products = product.order(:name).page(params[:page]).per(3)     else     if(catids.length == 0 && brandids.length != 0)        in 0..(brandids.length - 1)        @products[i]=product.where(:brands_test_id => brandids[i]).page(params[:page]).per(3)      end     else     if(catids.length != 0 && brandids.length == 0)        in 0..(catids.length - 1)        @products[i]=product.where(:categories_test_id => catids[i]).page(params[:page]).per(3)        end     else        in 0..(brandids.length - 1)          j in 0..(catids.length - 1)            @products=product.where(:brands_test_id => brandids[i]).where(:categories_test_id => catids[j]).page(params[:page]).per(3)      end   end end end end end      def arrayconvertion(p1)     arrid=array.new     sv=p1.split(",")     sv.each |s|       if(s != "all")       arrid << s.to_i       end     end     return arrid   end

here view part

<h1> product details </h1> <table>  <% @products.each_slice(3) |p1|%> <tr> <% p1.each |p| %> <td>  <div id="style">           <%= image_tag("images/#{p.id}.jpeg",:alt => p.name) %>            <p> name: </p> <%= p.name %>            <p> price: </p>            <%= p.price %>            <p> discount: </p>            <%= p.discount %>   </div>     </td> <% end %> </tr>  <% end %> </table> <div id="paginator">   <%= paginate @products,:remote => true %> </div>

i believe it's happening because of overwriting previous results instead of appending. please me fix this. believe


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