app/views/user_blockings/_form.html.erb
<%= form_with(model: user_blocking, local: true) do |form| %>
<% if user_blocking.errors.any? %>
<div id="error_explanation">
<h2><%= pluralize(user_blocking.errors.count, "error") %> prohibited this user_blocking from being saved:</h2>
<ul>
<% user_blocking.errors.full_messages.each do |message| %>
<li><%= message %></li>
<% end %>
</ul>
</div>
<% end %>
<div class="actions">
<%= form.submit %>
</div>
<% end %>