app/views/reports/_admin_form.html.erb
<%= form_for(@report) do |f| %>
<h2><%=@report.title.capitalize %></h2>
<div class="field">
<%= f.label :status %><br />
<%= f.select :status, [[(I18n.t 'report.status.open'), 0 ], [(I18n.t 'report.status.revision'), 1], [(I18n.t 'report.status.revised'), 2], [(I18n.t 'report.status.closed'), 3]], {}, class: 'form-control' %>
</div>
<div class="field">
<%= f.label :status_comment %><br>
<%= f.text_field :status_comment, class:'form-control' %>
</div>
<br/>
<div class="actions">
<%= f.submit class: 'btn btn-primary' %>
</div>
<% end %>