app/views/env_vars/_env_var.html.erb
<%= content_tag :tr, id: dom_id(env_var), class: "env-var" do %>
<td><%= text_field_tag :key, env_var.key, readonly: true, class: "input disabled",
data: { behaviour: "select-text" } %></td>
<td><%= text_field_tag :value, env_var.value, readonly: true, class: "input disabled",
data: { behaviour: "select-text" } %></td>
<td class="actions"><%= link_to icon("trash"),
server_app_env_var_path(env_var.app.server, env_var.app, env_var),
remote: true, method: :delete, class: "button is-link" %></td>
<% end %>