Ruby on rails 使用一个文本字段和一个类别选择类型字段进行pg_搜索

RubyonRails新手。我正在尝试使用pg_搜索gem，但遇到了一些困难是的，我正在查看文档。我想要一个既有文本字段又有选择字段类别的搜索表单。以下是我目前掌握的代码：

联系_info.rb

class ContactInfo < ActiveRecord::Base
  include PgSearch

 ...
  pg_search_scope :search_by_category, :against => :previous_value
  scope :in_category, lambda { |category_id|
    where(:category_id => category_id)
  }
end

我知道问题出在这方面：

@contact_infos = ContactInfo.search_by_category(params[:query])

但我不确定如何从视图home\index.html.erb中准确传递这两个变量

---

谢谢

好吧-我想出来了。如果它能帮助某人

在模型中，请联系_info.rb

class ContactInfo < ActiveRecord::Base
  include PgSearch

 ...
  pg_search_scope :search_by_category, :against => :previous_value
  scope :in_category, lambda { |category_id|
    where(:category_id => category_id)
  }
end

在控制器home_controller.rb中

class HomeController < ApplicationController
  def index

  if params[:search_by_category].nil?
    @contact_infos = ContactInfo.search(params[:query])
  else
    tmp = params[:search_by_category]
    @contact_infos = ContactInfo.search_by_category(params[:query]).in_category(tmp[:category_id])
    respond_to do |format|
      format.html # index.html.erb
      format.json { render json: @contact_infos }
    end
  end
 end
end

在视图home\index.html.erb中

...
    <%= form_for :search_by_category, :url => {:controller => 'home', :action => 'index'}, :html => {:method => 'get'} do |f| %>
    <%= text_field_tag :query %>
    <%= f.label :category_id, "Category" %>
    <%= f.collection_select :category_id, Category.all,
                            :id, :name,
                            {:prompt => 'All'} %>
    <br/>
    <%= f.submit "Search" %>
<% end %>
...

---

好吧，我知道了。如果它能帮助某人

在模型中，请联系_info.rb

class ContactInfo < ActiveRecord::Base
  include PgSearch

 ...
  pg_search_scope :search_by_category, :against => :previous_value
  scope :in_category, lambda { |category_id|
    where(:category_id => category_id)
  }
end

在控制器home_controller.rb中

class HomeController < ApplicationController
  def index

  if params[:search_by_category].nil?
    @contact_infos = ContactInfo.search(params[:query])
  else
    tmp = params[:search_by_category]
    @contact_infos = ContactInfo.search_by_category(params[:query]).in_category(tmp[:category_id])
    respond_to do |format|
      format.html # index.html.erb
      format.json { render json: @contact_infos }
    end
  end
 end
end

在视图home\index.html.erb中

...
    <%= form_for :search_by_category, :url => {:controller => 'home', :action => 'index'}, :html => {:method => 'get'} do |f| %>
    <%= text_field_tag :query %>
    <%= f.label :category_id, "Category" %>
    <%= f.collection_select :category_id, Category.all,
                            :id, :name,
                            {:prompt => 'All'} %>
    <br/>
    <%= f.submit "Search" %>
<% end %>
...