Rails:提交包含多个对象的表单

class Author< ApplicationRecord
  has_many :books
  accepts_nested_attributes_for :books
end

class Book< ApplicationRecord
  belongs_to :author
end

def author_params
  params.require(:author).permit(:name, books_attributes: [:id, :title, :_destroy])
end

<%= form_with(model: author, local: true) do |form| %>
  <%= form.label :name %>
  <%= form.text_field :name %>

  <%= form.fields_for :books do |book_form| %>
    <%= book_form.label :title %>
    <%= book_form.text_field :title %>
  <% end %>

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