school-platform/app/views/users/_form.html.erb

<%= bootstrap_form_for(@user) do |f| %>
  <%= render 'shared/error_messages', object: f.object %>

  <% if current_user.is_administrator_at?(@user.school) %>
    <%= f.text_field :name %>
    <%= f.select :gender, User.genders.keys, {} %>
    <%= f.date_field :birth_date %>
  <% end %>
  <%= f.text_field :login %>
  <%= f.email_field :email %>
  <%= f.phone_field :phone %>
  <%= f.password_field :password %>
  <%= f.password_field :password_confirmation %>

  <%= f.submit yield(:button_text), class: "btn btn-primary" %>
<% end %>