= table.column(:preview_picture) do |item|
  - if item.preview_picture.present?
    %img.img-responsive.bottom-margin-2{ src: item.preview_picture.image.url, alt: item.preview_picture.description, title: item.preview_picture.description }
= table.column :locale, sortable: true
= table.column :title, sortable: true, class: 'truncate-chars truncate-chars-30'
= table.column :body, sortable: true, class: 'truncate-chars truncate-chars-30'
= table.timestamps
= table.acts_as_published_actions

= table.column(:preview_picture) do |item|
  - if item.preview_picture.present?
    %img.img-responsive.bottom-margin-2{ src: item.preview_picture.image.url(:default_thumb), alt: item.preview_picture.description, title: item.preview_picture.description }
= table.column :locale, sortable: true
= table.column :title, sortable: true, class: 'truncate-chars truncate-chars-30'
= table.column :body, sortable: true, class: 'truncate-chars truncate-chars-30'
= table.timestamps
= table.acts_as_published_actions

Use default_thumb as preview image style.
Use default_thumb as preview image style.
