ruby on rails - Display nested attributes together in view or index.html.erb -

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i have product model of attributes , has_many relationship through product_images model. of updates, edits etc work charm i'm having difficulty bringing data through front end bootstrap theme.

what i'm trying have last 5 products , there default images come through can have product image , associated product attributes together. @ present have attributes , of images in 2 separate arrays.

i have looked @ group_by cant work out how have attributes + images grouped 2 arrays product_id. have no idea how go this.

app/controller/home_controller.html.erb

class homecontroller < applicationcontroller   def index     @products = product.last(5)     @product_ids = @products.map(&:id)     @product_images = productimage.where(:product_id => @product_ids,      :default_image => true )   end end

the below dumps 2 arrays not together.image / attributes per product_id

app/views/home/index.html.erb

 <% @products.each |pd| %>       <%= pd.product_name %>   <% end %>   <% @product_images.each |pi| %>       <%= image_tag (pi.product_image(:medium)) %>   <% end %>

what i'm looking output this

<div class="col-md-3 col-sm-6 hero-feature">       <div class="thumbnail">         <#product_image product_id1>          <div class="caption">           <h3>#product_name product_id1</h3>            <p>#product_description product_id1</p>            <p>           </p>         </div>       </div>     </div>  <div class="col-md-3 col-sm-6 hero-feature">           <div class="thumbnail">             <#product_image product_id2>              <div class="caption">               <h3>#product_name product_id2</h3>                <p>#product_description product_id2</p>                <p>               </p>             </div>           </div>         </div>  ...etc

answer sql output; cheers suslov

 product load (0.0ms)  select  `products`.* `products`   order `products`.`id` desc limit 5   sql (1.0ms)  select  distinct `products`.`id` `products` left outer join `product_images` on `product_images`.`product_id` = `products`.`id` `product_images`.`product_id` in (1, 2) , `product_images`.`default_image` = 1  order `products`.`id` desc limit 5   sql (0.0ms)  select `products`.`id` t0_r0, `products`.`product_name` t0_r1, `products`.`product_description` t0_r2, `products`.`product_type_id` t0_r3, `products`.`product_category_id` t0_r4, `products`.`product_colour_id` t0_r5, `products`.`product_size_id` t0_r6, `products`.`created_at` t0_r7, `products`.`updated_at` t0_r8, `product_images`.`product_id` t1_r0, `product_images`.`created_at` t1_r1, `product_images`.`updated_at` t1_r2, `product_images`.`id` t1_r3, `product_images`.`product_image_file_name` t1_r4, `product_images`.`product_image_content_type` t1_r5, `product_images`.`product_image_file_size` t1_r6, `product_images`.`product_image_updated_at` t1_r7, `product_images`.`default_image` t1_r8 `products` left outer join `product_images` on `product_images`.`product_id` = `products`.`id` `product_images`.`product_id` in (1, 2) , `product_images`.`default_image` = 1 , `products`.`id` in (2, 1)  order `products`.`id` desc   rendered home/index.html.erb within layouts/application (0.0ms)

updated index.htmml.erb partial answer suslov

 <div class="row text-center">       <% @product_images.each |pd| %>           <%= content_tag :div, :class => "col-md-3 col-sm-6 hero-feature" %>           <% pd.product_images.each |i| %>               <div class="thumbnail">                 <%= image_tag (i.product_image(:medium)) %>           <% end %> </div>           <div class="caption">             <h3><%= pd.product_name %></h3>             <p><%= pd.id %></p>             <p></p>           </div>           <% end %>       <% end %>     </div>

you can try includes if have explicitly set has_many association in product model (assuming is named product_images):

app/controller/home_controller.rb:

@products = product.includes(:product_images)                    .where(product_images: { default_image: true )                    .last(5)

app/views/home/index.html.erb:

<div class="col-md-3 col-sm-6 hero-feature">   <div class="thumbnail">     <% @products.each |pd| %>         <% pd.product_images.each |i| %>             <%= image_tag (i.product_image(:medium)) %>         <% end %>     <div class="caption">       <h3><%= pd.product_name %></h3>        <p><%= pd.id %></p>        <p></p>     </div>     <% end %>   </div> </div>

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