app/views/groups/invitations/index.html.erb
<div class="container">
<%= render partial: "application/breadcrumbs" %>
<div class="row justify-content-md-center">
<div class="col-md-6 text-center mt-2 mb-2rem">
<h2 class="mt-2 mb-2rem">
Invitations
</h2>
<%= link_to "Invite someone", new_group_invitation_path(@group),
class: "btn btn-lg btn-3d btn-primary mb-2rem px-4" %>
<div class="mt-2">
<%= render partial: "invitation",
collection: @invitations, cached: true %>
</div>
</div>
</div>
</div>