POS-Server/app/views/pre_transfers/_pre_transfer.html.erb

<tr id="pre_transfer_<%= pre_transfer.id %>">
  <td>
    #
  </td>
  <td class="text-center">
    <img src="<%= pre_transfer.product.small_img %>" width="100" height="100"/>
  </td>  
  <td>
    <%= pre_transfer.product.sku %>
  </td>
  <td>
    <%= pre_transfer.product.name %><br>
    <%= pre_transfer.product.display_attributes %>
  </td>
  <td>
    <% if pre_transfer.origin_is_pointsale == 1 %>
      <%= AvailableProduct.find_by(:pointsale_id =>  pre_transfer.origin_id, :product_id => pre_transfer.product_id).stock  + pre_transfer.quantity %> 
    <% else %> 
      <%= WarehouseStock.find_by(:warehouse_id => pre_transfer.origin_id, :product_id => pre_transfer.product_id).stock  + pre_transfer.quantity %>
    <% end %>
  </td>
  <td>
    <input type="number" min="1" id="quantity_<%= pre_transfer.id %>" class="form-control input-medium" id="quantity_<%= pre_transfer.id %>" value="<%= pre_transfer.quantity %>" oninput="updateQuantity($(this))" pattern="^[0-9]*[1-9][0-9]*$" title="La cantidad debe de ser mayor o igual a 1" required>
  </td>
  <td class="text-center">
    <button type="button" class="btn btn-icon-only btn-danger" onclick="deleteRow($(this))"><i class="fa fa-trash-o"></i></button>
  </td>
</tr>