app/views/articles/_stock_text.html.erb
<% if current_user.stock?(article) %>
<%= link_to tc(:unstock), unstock_article_path(article), method: :post, class: "stock-text-link", remote: true -%>
<% else %>
<%= link_to tc(:stock), stock_article_path(article), method: :post, class: "stock-text-link", remote: true -%>
<% end %>