app/views/json/enumeration/users.erb
"users": {
<% unless @users.empty? -%>
<% last_index = @users.size - 1 -%>
<% @users.each_with_index do |user, index| -%>
<%= user.username.to_json %>: {
"id": <%= user.id.to_json %>,
<%= render('@finding', item: user) -%>
}<% unless index == last_index -%>,<% end -%>
<% end -%>
<% end -%>
},