在rails中使用ajax保存数据

resources :items do
  post 'save', on: :collection
end

rails generate controller Items

class ItemsController < ApplicationController
  def save
    @item = Item.new(item_params)
    if @item.save
      render json: { success: true }
    else
      render json: { success: false, errors: @item.errors.full_messages }
    end
  end

  private

  def item_params
    params.require(:item).permit(:name, :description)
  end
end

<%= form_for Item.new, remote: true do |f| %>
  <%= f.text_field :name %>
  <%= f.text_area :description %>
  <%= f.submit 'Save' %>
<% end %>

$(document).on('ajax:success', 'form', function(event) {
  var response = event.detail[0];
  if (response.success) {
    alert('保存成功！');
  } else {
    alert('保存失败：' + response.errors.join(', '));
  }
});