app/views/admin/cases/reassign.html.erb
<div class='page-header'>
<div class='container'>
<h1>Edit Case Number <%= @case_file.id%></h1>
<%= link_to 'Back to Case', case_path(@case_file), class: 'btn btn-default' %>
</div>
</div>
<div class='container'>
<div class='row'>
<div class='col-xs-6'>
<%= simple_form_for @case_file, url: update_assignment_admin_case_path(@case_file) do |f| %>
<%= select("case_file", "user_id", @users.collect {|u| [ u.name, u.id ] }) %>
<%= f.input "user_id", @users.collect {|u| [ u.name, u.id ] }) %>
<%= f.submit 'Save', class: 'btn btn-primary' %>
<% end %>
</div>
</div>
</div>