Rails复杂表单 #

class Article < ApplicationRecord
  has_many :comments
  accepts_nested_attributes_for :comments, allow_destroy: true
end

<%= form_with model: @article do |form| %>
  <%= form.text_field :title %>
  
  <%= form.fields_for :comments do |comment_form| %>
    <%= comment_form.text_field :author %>
    <%= comment_form.text_area :body %>
  <% end %>
  
  <%= form.submit %>
<% end %>

<%= link_to_add_association '添加评论', form, :comments %>