除非在Rails表单中另有说明，否则如何使所有字段都是必填字段？

class User < ApplicationRecord
  validates :name, presence: true
  validates :email, presence: true
  validates :password, presence: true
  # 添加其他字段的验证...
end

<%= form_with model: @user, local: true do |form| %>
  <%= form.label :name %>
  <%= form.text_field :name, required: true %>

  <%= form.label :email %>
  <%= form.email_field :email, required: true %>

  <%= form.label :password %>
  <%= form.password_field :password, required: true %>

  <!-- 其他字段... -->

  <%= form.submit %>
<% end %>

<%= form_with model: @user, local: true do |form| %>
  <% if @user.errors.any? %>
    <div id="error_explanation">
      <h2><%= pluralize(@user.errors.count, "error") %> prohibited this user from being saved:</h2>
      <ul>
        <% @user.errors.full_messages.each do |message| %>
          <li><%= message %></li>
        <% end %>
      </ul>
    </div>
  <% end %>

  <!-- 表单字段... -->
<% end %>