app/views/recruitments/_add_agency_to_client.html.erb
<h1>Add agency to client</h1>
<%= form_for(@recruitment, url: company_recruitments_path) do |f| %>
<%= error_messages_for @recruitment %>
<div class='field'>
<%= f.label :agency %><br>
<%= f.text_field :agency_name %>
</div>
<div class='actions'>
<%= f.submit('Add agency') %>
</div>
<% end %>