如何在Ruby on Rails中进行全文搜索？

gem 'pg_search'

class Product< ApplicationRecord
  include PgSearch::Model

  pg_search_scope :search_by_full_text, against: [:name, :description], using: { tsearch: { prefix: true } }
end

class ProductsController< ApplicationController
  def index
    @products = Product.search_by_full_text(params[:query])
  end
end

<h1>Products</h1>

<%= form_with url: products_path, method: :get do |f| %>
  <%= f.label :query, "Search" %>
  <%= f.text_field :query %>
  <%= f.submit "Search" %>
<% end %>

<ul>
  <% @products.each do |product| %>
    <li>
      <%= product.name %>
      <%= product.description %>
    </li>
  <% end %>
</ul>