app/views/admin/inventory/overviews/edit.html.erb
<h2>Edit Inventory (<%= @product.name %>)</h2>
<%= error_messages_for 'product' %>
<%= form_for @product, :url => admin_inventory_overview_path(@product),
:html => {:class => 'prepend-4'} do |form| %>
<%= render :partial => '/admin/inventory/overviews/form', :locals => {:form => form}%>
</fieldset>
<div class=" generic_submit_button">
<%= form.submit "Update Inventory",
class: "button",
id: "edit_inventory_button" %>
</div>
<% end %>